一、widget:桌面小控件
1 写一个类extends AppWidgetProvider
2 在清单文件件中注册：
<receiver android:name=".ExampleAppWidgetProvider" > <intent-filter> <action android:name="android.appwidget.action.APPWIDGET_UPDATE" /> intent-filter> <meta-data android:name="android.appwidget.provider" android:resource="@xml/example_appwidget_info" /> receiver>
3 在res/xml创建example_appwidget_info.xml
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android" android:minWidth="294dp" android:minHeight="72dp" android:initialLayout="@layout/example_appwidget"> appwidget-provider>
4 指定布局 example_appwidget.xml
生命周期：
1 添加到桌面：
onEnabled() --> onUpdate() //经过测试，4.0以后的版本添加到桌面时不会执行onEnabled()了
2 删除
onDeleted()----> onDisabled() //经过测试，4.0以后的版本删除时不会执行onDisabled()了
如果桌面已经有一个了widget的实例存在，再次添加onUpdate()
删除之后，如果桌面上还有widget的实例存在，只会调用onDeleted().
更成时间的显示：
1 使用一个Servic来执行时间的更新
Timer TimerTask
练习：查看API文档可以根据文档里面的例子来做
package com.shellway.widget; import android.support.v7.app.ActionBarActivity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; public class MainActivity extends ActionBarActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } }
package com.shellway.widget; import java.text.SimpleDateFormat; import android.app.PendingIntent; import android.appwidget.AppWidgetManager; import android.appwidget.AppWidgetProvider; import android.content.Context; import android.content.Intent; import android.sax.StartElementListener; import android.util.Log; import android.widget.RemoteViews; public class ExampleAppWidgetProvider extends AppWidgetProvider { @Override public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) { // TODO Auto-generated method stub super.onUpdate(context, appWidgetManager, appWidgetIds); //开启一个实时计时的服务 Intent intent = new Intent(context,MyService.class); context.startService(intent); /*RemoteViews view = new RemoteViews(context.getPackageName(), R.layout.wedget); long date = java.lang.System.currentTimeMillis(); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); String time = sdf.format(date); //给view设置时间 view.setTextViewText(R.id.tv_timer, time); //点击它，要跳转到一个新的界面 Intent intent = new Intent(context,MainActivity.class); PendingIntent pintent = PendingIntent.getActivity(context, 100, intent, 0); view.setOnClickPendingIntent(R.id.tv_timer, pintent); //更新widget,要放在最后 appWidgetManager.updateAppWidget(appWidgetIds, view);*/ } @Override public void onDeleted(Context context, int[] appWidgetIds) { // TODO Auto-generated method stub super.onDeleted(context, appWidgetIds); Log.i("i", " onDeleted "); //在用户删除掉的时候把服务也停止 Intent intent = new Intent(context,MyService.class); context.stopService(intent); } }
package com.shellway.widget; import java.text.SimpleDateFormat; import java.util.Timer; import java.util.TimerTask; import android.app.PendingIntent; import android.app.Service; import android.appwidget.AppWidgetHostView; import android.appwidget.AppWidgetManager; import android.content.ComponentName; import android.content.Intent; import android.os.IBinder; import android.widget.RemoteViews; public class MyService extends Service { private Timer timer; private TimerTask task = new TimerTask(){ @Override public void run() { // TODO Auto-generated method stub AppWidgetManager appWidgetManager = AppWidgetManager .getInstance(getApplicationContext()); RemoteViews view = new RemoteViews(getPackageName(), R.layout.wedget); long date = java.lang.System.currentTimeMillis(); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); String time = sdf.format(date); //给view设置时间 view.setTextViewText(R.id.tv_timer, time); //点击它，要跳转到一个新的界面 Intent intent = new Intent(getApplicationContext(),MainActivity.class); PendingIntent pintent = PendingIntent.getActivity(getApplicationContext(), 100, intent, 0); view.setOnClickPendingIntent(R.id.tv_timer, pintent); ComponentName provider = new ComponentName(getApplicationContext(), ExampleAppWidgetProvider.class); appWidgetManager.updateAppWidget(provider, view); } }; @Override public void onCreate() { // TODO Auto-generated method stub super.onCreate(); //新建一个计时器 timer = new Timer(); //用计时器开启一个任务，计时器产生1秒后开始，每隔一秒更新一次（即：每秒执行一次run方法） timer.schedule(task, 1000, 1000); } @Override public void onDestroy() { // TODO Auto-generated method stub super.onDestroy(); //取消计时器 timer.cancel(); task = null; } @Override public IBinder onBind(Intent intent) { // TODO Auto-generated method stub return null; } }
xml version="1.0" encoding="utf-8"?>
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
android:minWidth="294dp"
android:minHeight="40dp"
android:initialLayout="@layout/wedget"
>
appwidget-provider>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.shellway.widget.MainActivity" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="这是一个widget" /> RelativeLayout>
xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@android:color/white"
>
<TextView
android:id="@+id/tv_timer"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:textColor="#f00"
android:text="我是widget"
/>
LinearLayout>
xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.shellway.widget"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
intent-filter>
activity>
<receiver android:name=".ExampleAppWidgetProvider" >
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
intent-filter>
<meta-data
android:name="android.appwidget.provider"
android:resource="@xml/example_appwidget" />
receiver>
<service android:name=".MyService">service>
application>
manifest>
运行结果截图：
二、网页实现界面：webview
1 数据：应该来自于手机本身。
网页资源若放在本地asset目录中则会自动产生一个：file:///android_asset/目录
webview 可以把一个java对象传递给网页，再让javascript去调用这个对象里面的方法
1 onload() javascript 代码调用java代码 java再调用javascript
package com.shellway.htmlui; import java.util.List; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import com.shellway.domain.Contact; import com.shellway.service.ContactService; import android.support.v7.app.ActionBarActivity; import android.annotation.SuppressLint; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.Window; import android.webkit.WebView; public class MainActivity extends ActionBarActivity { private WebView webview; private ContactService service; @SuppressLint({ "JavascriptInterface", "SetJavaScriptEnabled" }) @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // requestWindowFeature(Window.FEATURE_NO_TITLE); 设置无标题 setContentView(R.layout.activity_main); webview = (WebView) findViewById(R.id.webview); service = new ContactService(); //给webview传递一个对象 webview.addJavascriptInterface(new ContactPulgin(), "contact"); //设置webview可以执行JavaScript代码 webview.getSettings().setJavaScriptEnabled(true); //加载网页 webview.loadUrl("file:///android_asset/index.html"); } private class ContactPulgin { //网页一加载就会执行οnlοad="javascript:contact.showcontacts()"，写方法 public void showcontacts(){ try { Listcontacts = service.getContact(); JSONArray jsonArray = new JSONArray(); for (int i = 0; i < contacts.size(); i++) { JSONObject jsonObject = new JSONObject(); Contact info = contacts.get(i); jsonObject.put("name", info.getName()); jsonObject.put("amount", info.getAmount()); jsonObject.put("phone", info.getPhone()); jsonArray.put(jsonObject); } String json = jsonArray.toString(); //给javascript返回一个json数据 webview.loadUrl("javascript:show("+ json +")"); } catch (JSONException e) { e.printStackTrace(); } } //实现点击电话号码打电话功能 public void call(String phone){ Intent intent = new Intent(Intent.ACTION_CALL,Uri.parse("tel:"+phone)); startActivity(intent); } } }
package com.shellway.service; import java.util.ArrayList; import java.util.List; import com.shellway.domain.Contact; public class ContactService { //模拟数据 public ListgetContact(){ List contacts = new ArrayList (); contacts.add(new Contact("李斯", 12000, "13128783361")); contacts.add(new Contact("赵高", 10000, "13128783362")); contacts.add(new Contact("张良", 15000, "13128783363")); contacts.add(new Contact("刘邦", 13000, "13128783364")); contacts.add(new Contact("项羽", 17000, "13128783365")); return contacts; } }
package com.shellway.domain; public class Contact { private String name; private long amount; private String phone; public Contact(String name, long amount, String phone) { super(); this.name = name; this.amount = amount; this.phone = phone; } public String getName() { return name; } public void setName(String name) { this.name = name; } public long getAmount() { return amount; } public void setAmount(long amount) { this.amount = amount; } public String getPhone() { return phone; } public void setPhone(String phone) { this.phone = phone; } @Override public String toString() { return "Contact [name=" + name + ", amount=" + amount + ", phone=" + phone + "]"; } }
DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title heretitle>
<script type="text/javascript">
function show(jsondata){// [{name:"xxx",amount:600,phone:"13988888"},{name:"bb",amount:200,phone:"1398788"}]
var jsonobjs = eval(jsondata);
var table = document.getElementById("personTable");
for(var y=0; y<jsonobjs.length; y++){
var tr = table.insertRow(table.rows.length); //添加一行
//添加三列
var td1 = tr.insertCell(0);
var td2 = tr.insertCell(1);
td2.align = "center";
var td3 = tr.insertCell(2);
td3.align = "center";
//设置列内容和属性
td1.innerHTML = jsonobjs[y].name;
td2.innerHTML = jsonobjs[y].amount;
td3.innerHTML = ""+ jsonobjs[y].phone+ "";
}
}
script>
head>
<body onload="javascript:contact.showcontacts()">
<table border="0" width="100%" id="personTable" cellspacing="0">
<tr>
<td width="35%">姓名td><td width="30%" align="center">存款td><td align="center">电话td>
tr>
table>
<a href="javascript:window.location.reload()">刷新a>
body>
html>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.shellway.htmlui.MainActivity" > <WebView android:id="@+id/webview" android:layout_width="fill_parent" android:layout_height="fill_parent" /> RelativeLayout>
xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.shellway.htmlui"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<uses-permission android:name="android.permission.CALL_PHONE"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
intent-filter>
activity>
application>
manifest>
运行结果截图：
三、安装和卸载应用：apk的minetype为：application/vnd.android.package-archive
package com.shellway.install; import java.io.File; import android.support.v7.app.ActionBarActivity; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.os.Environment; import android.view.Menu; import android.view.MenuItem; import android.view.View; public class MainActivity extends ActionBarActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } public void install(View view){ //因为在系统中已经存在安装模块的实现，我们只需激活它就可以了 Intent intent = new Intent(); intent.setAction(Intent.ACTION_VIEW); File file = new File(Environment.getExternalStorageDirectory(),"htmlui.apk"); //文件类型一般可以在tomcat的web.xml配置文件中查找 intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive"); startActivity(intent); } public void uninstall(View view){ Intent intent = new Intent(); intent.setAction(Intent.ACTION_DELETE); //卸载应用只需要包名 intent.setData(Uri.parse("package:com.shellway.htmlui")); startActivity(intent); } }
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="install" android:text="安装" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="uninstall" android:text="卸载" /> LinearLayout>
xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.shellway.install"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
intent-filter>
activity>
application>
manifest>
运行结果截图：
四、metadata元数据
package com.shellway.metadata; import android.support.v7.app.ActionBarActivity; import android.content.ComponentName; import android.content.pm.ActivityInfo; import android.content.pm.PackageManager; import android.content.pm.PackageManager.NameNotFoundException; import android.os.Bundle; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import android.view.View; public class MainActivity extends ActionBarActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } public void get(View view){ try { //得到包管理器,它可以获取四大组件的元数据信息 PackageManager pm = getPackageManager(); ComponentName component = new ComponentName(this, MainActivity.class); ActivityInfo info = pm.getActivityInfo(component, PackageManager.GET_META_DATA); Bundle bundle = info.metaData; String name = bundle.getString("name"); int number = bundle.getInt("number"); String first = bundle.getString("first"); String two = getString(bundle.getInt("two")); Log.i("i", name); Log.i("i", number+""); Log.i("i", first); Log.i("i", two); } catch (NameNotFoundException e) { e.printStackTrace(); } } }
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" > <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="get" android:text="得到数据" /> LinearLayout>
xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.shellway.metadata"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
intent-filter>
<meta-data android:name="name" android:value="骄阳08的博客" />
<meta-data android:name="number" android:value="08" />
<meta-data android:name="first" android:value="@string/first" />
<meta-data android:name="two" android:resource="@string/two" />
activity>
application>
manifest>
运行结果截图：
五、drawble:有一个可以把图片处理成.9.png类型的工具在android-sdk\tools下的draw9patch.bat
1、Layer List:叠代列表，比如相框和相片的关系
2、State List:状态列表，比如不点击是一个状态，点击了又是一个状态
3、Level List:打分效果，比如信号强弱
4、Transition Drawable:移动动画，即从一个动画到什么样的一个动画
5、Inset Drawable:插入图片，比如可以在一张图片周围空余的地方插入另一张图片
6、Clip Drawable:裁剪图片，比如进度条
7、Scale Drawable:拉伸和缩放图片
8、Shape Drawable:通过编码XML文件绘制一张图形，经常用到
package com.shellway.drawable; import android.support.v7.app.ActionBarActivity; import android.graphics.drawable.LayerDrawable; import android.graphics.drawable.LevelListDrawable; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.ImageView; public class MainActivity extends ActionBarActivity { private ImageView iv; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); iv = (ImageView) findViewById(R.id.iv); } public void reset(View view){ //得到我们自定义的layerlist对象 // LayerDrawable layerDrawable = (LayerDrawable) getResources() // .getDrawable(R.drawable.layerlist); //把layerlist对象里面的R.id.user图片替换成我们想要的图片ic_launcher // layerDrawable.setDrawableByLayerId(R.id.user, getResources() // .getDrawable(R.drawable.ic_launcher)); //替换后再设置回给ImageView // iv.setImageDrawable(layerDrawable); LevelListDrawable levelList = (LevelListDrawable) iv.getDrawable(); levelList.setLevel(20); iv.setImageDrawable(levelList); } }
xml version="1.0" encoding="utf-8"?>
<layer-list
xmlns:android="http://schemas.android.com/apk/res/android" >
<item
android:drawable="@drawable/faceback"
/>
<item
android:drawable="@drawable/user"
android:id="@+id/user"
android:top="68dp"
android:right="18dp"
android:bottom="22dp"
android:left="18dp" />
layer-list>
xml version="1.0" encoding="utf-8"?>
<level-list
xmlns:android="http://schemas.android.com/apk/res/android" >
<item
android:drawable="@drawable/faceback"
android:maxLevel="10"
android:minLevel="0" />
<item
android:drawable="@drawable/user"
android:maxLevel="20"
android:minLevel="10" />
level-list>
xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:state_pressed="true" android:drawable="@drawable/bg_selected">item>
<item android:drawable="@drawable/bg_normal">item>
selector>
xml version="1.0" encoding="utf-8"?>
<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners
android:radius="3dp"
/>
<gradient
android:startColor="#D0F4F9"
android:centerColor="#4BED23"
android:endColor="#5FF2FA"
/>
<padding
android:left="2dp"
android:top="2dp"
android:right="2dp"
android:bottom="2dp" />
<stroke
android:width="1dp"
android:color="#00f"
android:dashWidth="10dp"
android:dashGap="2dp" />
shape>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <ImageView android:id="@+id/iv" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/levellist" /> <Button android:id="@+id/bt" android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="reset" android:text=" 下 一 张 " android:background="@drawable/shapelist" /> LinearLayout>
xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.shellway.drawable"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
intent-filter>
activity>
application>
manifest>
运行结果截图：
六、泡泡窗口：popupwindow
package com.shellway.popupwindow; import android.support.v7.app.ActionBarActivity; import android.graphics.ColorFilter; import android.graphics.drawable.BitmapDrawable; import android.graphics.drawable.Drawable; import android.os.Bundle; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.view.ViewGroup.LayoutParams; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.BaseAdapter; import android.widget.GridView; import android.widget.ImageView; import android.widget.PopupWindow; import android.widget.TextView; public class MainActivity extends ActionBarActivity { private LayoutInflater inflater; private PopupWindow mpPopupWindow; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); inflater = LayoutInflater.from(this); } public void show(View view){ View contentView = inflater.inflate(R.layout.popupwindow, null); GridView gv = (GridView) contentView.findViewById(R.id.gridview); gv.setAdapter(new MyAdapter()); gv.setOnItemClickListener(new MyOnItemClickListener()); mpPopupWindow = new PopupWindow(contentView, LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT); //如果需要点击其他的地方popupwindow自动消失： 1 popupwindow必须指定背景 2 poupwindow必须获取焦点 mpPopupWindow.setBackgroundDrawable(new BitmapDrawable()); mpPopupWindow.setFocusable(true); //把它显示在view下面即所点击的按钮下面 mpPopupWindow.showAsDropDown(view); } private class MyOnItemClickListener implements OnItemClickListener{ @Override public void onItemClick(AdapterView parent, View view, int position, long id) { // TODO Auto-generated method stub mpPopupWindow.dismiss(); } } private class MyAdapter extends BaseAdapter{ private int[] images = new int[]{R.drawable.i1,R.drawable.i2,R.drawable.i3 ,R.drawable.i4,R.drawable.i5,R.drawable.i6,R.drawable.i7,R.drawable.i8}; private String[] names = new String[]{"搜索", "文件管理", "下载管理", "全屏" , "网址", "书签", "加入书签", "分享页面"}; @Override public int getCount() { // TODO Auto-generated method stub return images.length; } @Override public Object getItem(int position) { // TODO Auto-generated method stub return names[position]; } @Override public long getItemId(int position) { // TODO Auto-generated method stub return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { View view = inflater.inflate(R.layout.item, null); ImageView iv = (ImageView) view.findViewById(R.id.iv); TextView tv = (TextView) view.findViewById(R.id.tv); iv.setImageResource(images[position]); tv.setText(names[position]); return view; } } }
xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<gradient
android:startColor="#5FF2FA"
android:endColor="#4BED23"/>
shape>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="show" android:text="显示" /> LinearLayout>
xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@drawable/bg">
<GridView
android:id="@+id/gridview"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:numColumns="4"
android:horizontalSpacing="2dp"
android:verticalSpacing="2dp"
>GridView>
LinearLayout>
xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageView
android:id="@+id/iv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
/>
<TextView
android:id="@+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
/>
LinearLayout>
xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.shellway.popupwindow"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
intent-filter>
activity>
application>
manifest>
运行结果截图：
七、tabhost标签页、自定义标签页
package com.shellway.tabhost; import android.support.v7.app.ActionBarActivity; import android.os.Bundle; import android.util.Log; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.ImageView; import android.widget.TabHost; import android.widget.TabHost.TabSpec; import android.widget.TextView; public class MainActivity extends ActionBarActivity { private TabHost tb; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); tb = (TabHost) findViewById(R.id.tabhost); tb.setup();//找到tabwidget 、 FrameLayout TabSpec tab1 = tb.newTabSpec("tab1"); //指定标签 // tab1.setIndicator("首页", getResources().getDrawable(R.drawable.i1)); tab1.setIndicator(createView("首页", R.drawable.i1));//指定标签 tab1.setContent(R.id.line1);//指定标签页的内容 tb.addTab(tab1); TabSpec tab2 = tb.newTabSpec("tab2"); //指定标签 // tab2.setIndicator("第二页", getResources().getDrawable(R.drawable.i2)); tab2.setIndicator(createView("第二页", R.drawable.i2));//指定标签 tab2.setContent(R.id.line2);//指定标签页的内容 tb.addTab(tab2); TabSpec tab3 = tb.newTabSpec("tab3"); //指定标签 // tab3.setIndicator("第三页", getResources().getDrawable(R.drawable.i7)); tab3.setIndicator(createView("第三页", R.drawable.i7));//指定标签 tab3.setContent(R.id.line3);//指定标签页的内容 tb.addTab(tab3); } //创建一个View返回 public View createView(String name,int image){ View view = View.inflate(this, R.layout.tab, null); ImageView iv_title = (ImageView) view.findViewById(R.id.iv_tile); TextView tv_title = (TextView) view.findViewById(R.id.tv_title); iv_title.setImageResource(image); tv_title.setText(name); return view; } }
xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:state_selected="true" android:drawable="@drawable/bg_selected">item>
<item android:drawable="@drawable/bg_normal">item>
selector>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/tabhost" android:orientation="vertical" > <LinearLayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <TabWidget android:id="@android:id/tabs" android:layout_width="fill_parent" android:layout_height="wrap_content" /> <FrameLayout android:id="@android:id/tabcontent" android:layout_width="fill_parent" android:layout_height="0dp" android:layout_weight="1" > <LinearLayout android:id="@+id/line1" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@android:color/darker_gray" > <TextView android:layout_width="fill_parent" android:layout_height="fill_parent" android:text="首页" /> LinearLayout> <LinearLayout android:id="@+id/line2" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@android:color/darker_gray" > <TextView android:layout_width="fill_parent" android:layout_height="fill_parent" android:text="第二页" /> LinearLayout> <LinearLayout android:id="@+id/line3" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@android:color/darker_gray" > <TextView android:layout_width="fill_parent" android:layout_height="fill_parent" android:text="第三页" /> LinearLayout> FrameLayout> LinearLayout> TabHost>
xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@drawable/selector">
<ImageView
android:id="@+id/iv_tile"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="@drawable/i1"
/>
<TextView
android:id="@+id/tv_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="首页"
/>
LinearLayout>
xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.shellway.tabhost"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
intent-filter>
activity>
application>
manifest>
运行结果截图：
八、数据量多：分页加载数据
package com.shellway.pageloaddata; import java.util.ArrayList; import java.util.List; import com.shellway.service.DataService; import android.support.v7.app.ActionBarActivity; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.os.SystemClock; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.AbsListView; import android.widget.AbsListView.OnScrollListener; import android.widget.ArrayAdapter; import android.widget.ListView; public class MainActivity extends ActionBarActivity { private static final int FINISH_GET_DATA = 0; private ListView lv_data; private Listdata;//加载的总数据 private DataService service; private ArrayAdapter adapter; private View footer; private boolean finish = true;//是否加载完成的标志 Handler handler = new Handler(){ public void handleMessage(android.os.Message msg) { switch (msg.what) { case FINISH_GET_DATA: ArrayList result = (ArrayList ) msg.obj; data.addAll(result); adapter.notifyDataSetChanged();//让listview自动刷新 finish = true; if (lv_data.getFooterViewsCount()>0) { lv_data.removeFooterView(footer); } break; default: break; } }; }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); lv_data = (ListView) findViewById(R.id.lv_data); service = new DataService(); data = new ArrayList (); List result = service.getData(1, 20); data.addAll(result); adapter = new ArrayAdapter (this, R.layout.item, R.id.tv_data, data); footer = View.inflate(this, R.layout.footer, null); //在这里先给适配器声明说我要添加页脚，然后为了不让一开始就有添加的页脚存在我们先除去页脚 lv_data.addFooterView(footer); lv_data.setAdapter(adapter); lv_data.removeFooterView(footer); //给listview设置滑动事件 lv_data.setOnScrollListener(new MyOnScrollListener()); } private class MyOnScrollListener implements OnScrollListener{ int totalPage = 5;//设定加载的总页数 final int pageSize = 20;//设定每页加载20条数据 //scrollState:表示滑动状态 1表示开始滑动、2表示正在滑动、0表示停止滑动 public void onScrollStateChanged(AbsListView view, int scrollState) { // TODO Auto-generated method stub } /** * firstVisibleItem:表示当前可见页面的起始数据(即最上面一条) * visibleItemCount：表示当前手机窗口可以显示的总共数据条数 * totalItemCount：表示已经加载的总共数据条数 */ public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { //已经滑动完的总共条数 final int totalCount = firstVisibleItem + visibleItemCount; int currentPage = totalCount/pageSize;//当时是第几页 int nextPage = currentPage + 1;//下一页的页数 //判断是否已经移动到了listview的最后 if (totalCount == totalItemCount&&nextPage <= totalPage&&finish) { finish = false; //添加页脚 lv_data.addFooterView(footer); new Thread(){ @Override public void run() { SystemClock.sleep(3000);//模拟网络延迟，睡3秒 List data = service.getData(totalCount+1, pageSize); Message msg = new Message(); msg.what = FINISH_GET_DATA; msg.obj = data; handler.sendMessage(msg); } }.start(); } } } }
package com.shellway.service; import java.util.ArrayList; import java.util.List; public class DataService { //加载数据 public ListgetData(int startData,int pageSize){ int length = startData + pageSize; List list = new ArrayList (); for (int i = startData; i < length; i++) { String data = new String("分页加载的数据：数据"+i); list.add(data); } return list; } }
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@color/abc_search_url_text_normal" android:orientation="vertical" > <ListView android:id="@+id/lv_data" android:layout_width="match_parent" android:layout_height="match_parent" >ListView> LinearLayout>
xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<ProgressBar
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:textSize="20dp"
android:text="数据正在加载中。。。。"
/>
LinearLayout>
xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/tv_data"
android:layout_width="match_parent"
android:layout_height="26dp"
android:layout_marginLeft="5dp"
android:textSize="20dp"
/>
LinearLayout>
xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.shellway.pageloaddata"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
intent-filter>
activity>
application>
manifest>
运行结果截图：
九、快捷图标的创建和删除
可以参考Android源码中的apps\Launcher2\AndroidManifest.xml文件，它对应的数据库表为：launcher.db
package com.shellway.shortcut; import android.support.v7.app.ActionBarActivity; import android.app.PendingIntent; import android.content.ComponentName; import android.content.Intent; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.os.Parcelable; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Toast; public class MainActivity extends ActionBarActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } public void create(View view){ if (isExist()) { Toast.makeText(this, "快捷方式已经存在", 1).show(); }else{ Intent intent = new Intent(); intent.setAction("com.android.launcher.action.INSTALL_SHORTCUT"); //设置快捷方式的名称 intent.putExtra(Intent.EXTRA_SHORTCUT_NAME, "快捷方式"); //设置快捷方式的图标 Parcelable icon = Intent.ShortcutIconResource.fromContext(this, R.drawable.main_icon); intent.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, icon); //设置快捷方式要要激活的应用 Intent i = new Intent(); i.setAction(Intent.ACTION_MAIN); i.addCategory(Intent.CATEGORY_LAUNCHER); i.setComponent(new ComponentName(this, MainActivity.class)); intent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, i); //发出广播 sendBroadcast(intent); } } //检查快捷方式是否已经存在 public boolean isExist(){ Uri uri = null; //添加兼容性 if (getSDKVersion()<8) {//8代表2.2以下版本，而在2.2版本以前是launcher，之后才是launcher2 uri = Uri.parse("content://com.android.launcher.settings/favorites"); }else{ uri = Uri.parse("content://com.android.launcher2.settings/favorites"); } boolean flag = false; Cursor c = getContentResolver().query(uri, null, "title=?", new String[]{"快捷方式"}, null); if (c.moveToNext()) { flag = true; } c.close(); return flag; } //得到SDK版本信息 public int getSDKVersion(){ return android.os.Build.VERSION.SDK_INT; } //删除快捷方式 public void delete(View view){ Intent intent = new Intent(); intent.setAction("com.android.launcher.action.UNINSTALL_SHORTCUT"); //设置快捷方式的名称 intent.putExtra(Intent.EXTRA_SHORTCUT_NAME, "快捷方式"); //设置快捷方式的图标 Parcelable icon = Intent.ShortcutIconResource.fromContext(this, R.drawable.main_icon); intent.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, icon); //设置快捷方式要要激活的应用 Intent i = new Intent(); i.setAction(Intent.ACTION_MAIN); i.addCategory(Intent.CATEGORY_LAUNCHER); i.setComponent(new ComponentName(this, MainActivity.class)); intent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, i); //发出广播 sendBroadcast(intent); } }
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="create" android:text="创建快捷图标" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="delete" android:text="删除快捷图标" /> LinearLayout>
xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.shellway.shortcut"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<uses-permission android:name="com.android.launcher.permission.INSTALL_SHORTCUT"/>
<uses-permission android:name="com.android.launcher.permission.READ_SETTINGS"/>
<uses-permission android:name="com.android.launcher.permission.UNINSTALL_SHORTCUT"/>
<uses-permission android:name="com.android.launcher.permission.WRITE_SETTINGS"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
intent-filter>
activity>
application>
manifest>
运行结果截图：
十、菜单的创建和上下文菜单
1、普通菜单：布局文件实现和代码实现两种方式
package com.shellway.menu; import android.support.v7.app.ActionBarActivity; import android.os.Bundle; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.SubMenu; import android.widget.Toast; public class MainActivity extends ActionBarActivity { private static final int MENU_NEW = 0; private static final int MENU_DELETE = 1; private static final int SUBMENU = 3; private static final int SUBMENU1 = 4; private static final int SUBMENU2 = 5; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } @Override public boolean onCreateOptionsMenu(Menu menu) { //编码方式创建菜单 /* menu.add(0, MENU_NEW, 0, "新建"); menu.add(0, MENU_DELETE, 0, "删除"); SubMenu subMenu = menu.addSubMenu("子菜单"); SubMenu subMenu1 = subMenu.addSubMenu(0, SUBMENU1, 0, "子菜单1"); SubMenu subMenu2 = subMenu.addSubMenu(0, SUBMENU2, 0, "子菜单2");*/ //这里使用布局文件创建菜单代替编码方式 MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.main, menu); return super.onCreateOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { //给菜单添加点击事件 int id = item.getItemId(); switch (id) { case MENU_NEW: Toast.makeText(this, item.getTitle(), Toast.LENGTH_SHORT).show(); break; case MENU_DELETE: Toast.makeText(this, item.getTitle(), Toast.LENGTH_SHORT).show(); break; case SUBMENU1: Toast.makeText(this, item.getTitle(), Toast.LENGTH_SHORT).show(); break; case SUBMENU2: Toast.makeText(this, item.getTitle(), Toast.LENGTH_SHORT).show(); break; default: Toast.makeText(this, item.getTitle(), Toast.LENGTH_SHORT).show(); break; } return super.onOptionsItemSelected(item); } }
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.shellway.menu.MainActivity" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/hello_world" /> RelativeLayout>
<menu xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" tools:context="com.shellway.menu.MainActivity" > <item android:id="@+id/menu_new" android:title="新建立" /> <item android:id="@+id/menu_delete" android:title="删除" /> <item android:id="@+id/submenu" android:title="子菜单" > <menu> <item android:id="@+id/submenu1" android:title="子菜单1" /> <item android:id="@+id/submenu2" android:title="子菜单2" /> menu> item> menu>
xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.shellway.menu"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
intent-filter>
activity>
application>
manifest>
运行结果截图：
2、上下文菜单：实现复制号码到拨号盘、发送短信、复制电话号码到剪切板
package com.shellway.contextmenu; import android.support.v7.app.ActionBarActivity; import android.annotation.SuppressLint; import android.content.ClipData; import android.content.ClipboardManager; import android.content.Context; import android.content.Intent; import android.database.Cursor; import android.graphics.Color; import android.net.Uri; import android.os.Bundle; import android.provider.CallLog.Calls; import android.view.ContextMenu; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.view.ContextMenu.ContextMenuInfo; import android.widget.AdapterView.AdapterContextMenuInfo; import android.widget.CursorAdapter; import android.widget.ListView; import android.widget.TextView; public class MainActivity extends ActionBarActivity { private static final int COPY_NUMBERTO_ID = 0; private static final int SEND_SMS_ID = 1; private static final int COPY_NUMBER_ID = 2; private ListView listview; private CursorAdapter adapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); listview = (ListView) findViewById(R.id.listview); //查询联系人表获得联系人电话号码 Cursor c = getContentResolver().query(Calls.CONTENT_URI, new String[]{Calls._ID,Calls.NUMBER} , null, null, null); adapter = new MyCursorAdapter(this, c); //如果数据是来自于手机本省的数据库，就使用CursorAdpater的子类 listview.setAdapter(adapter); //注册上下文菜单 registerForContextMenu(listview); } //创建一个上下文菜单 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { // TODO Auto-generated method stub menu.add(0, COPY_NUMBERTO_ID, 0, "复制电话号码到拨号盘"); menu.add(0, SEND_SMS_ID, 0, "发送短信"); menu.add(0, COPY_NUMBER_ID, 0, "复制电话号码"); super.onCreateContextMenu(menu, v, menuInfo); } //给上下文菜单添加点击事件 @SuppressLint("NewApi") public boolean onContextItemSelected(MenuItem item) { // TODO Auto-generated method stub int id = item.getItemId(); AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo(); int position = info.position; Cursor c = (Cursor) adapter.getItem(position); String number = null; if (c.moveToNext()) { number = c.getString(c.getColumnIndex(Calls.NUMBER)); } Intent intent = null; switch (id) { case COPY_NUMBERTO_ID: intent = new Intent(); intent.setAction(Intent.ACTION_DIAL); intent.setData(Uri.parse("tel:" + number)); startActivity(intent); break; case SEND_SMS_ID: intent = new Intent(); intent.setAction(Intent.ACTION_SENDTO); intent.setData(Uri.parse("smsto:" + number)); startActivity(intent); break; case COPY_NUMBER_ID: //得到剪贴板服务 ClipboardManager cm = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE); cm.setPrimaryClip(ClipData.newPlainText("number", number)); break; default: break; } return super.onContextItemSelected(item); } private class MyCursorAdapter extends CursorAdapter{ public MyCursorAdapter(Context context, Cursor c) { super(context, c); // TODO Auto-generated constructor stub } //创建item的布局 public View newView(Context context, Cursor cursor, ViewGroup parent) { // TODO Auto-generated method stub TextView tv = new TextView(context); tv.setTextSize(22); //tv.setBackgroundColor(getResources().getColor(R.color.color)); tv.setBackgroundColor(Color.LTGRAY); tv.setTextColor(Color.BLACK); return tv; } //把数据与控件绑定 public void bindView(View view, Context context, Cursor cursor) { // TODO Auto-generated method stub String number = cursor.getString(cursor.getColumnIndex(Calls.NUMBER)); TextView tv = (TextView) view; tv.setText(number); } } }
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" > <ListView android:id="@+id/listview" android:layout_width="fill_parent" android:layout_height="fill_parent" >ListView> LinearLayout>
xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.shellway.contextmenu"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<uses-permission android:name="android.permission.READ_CONTACTS"/>
<uses-permission android:name="android.permission.WRITE_CALL_LOG"/>
<uses-permission android:name="android.permission.READ_CALL_LOG"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
intent-filter>
activity>
application>
manifest>
运行结果截图：
上下文菜单一般是针对ListView（多条数据的操作）
十一、反编译
反编译的步骤：
1 apktool1.4.1.tar.bz2 apktool-install-windows-r04-brut1.tar.bz2 dex2jar-0.0.7.11-SNAPSHOT.zip jd-gui.cfg 工具
2 解压上面的工具
3 把apktool1.4.1.tar.bz2解压出来的apktool.jar复制到apktool-install-windows-r04-brut1.tar.bz2目录
4 放置一个xxx.apk到apktool-install-windows-r04-brut1目录
cd /d C:\tools\apktool-install-windows-r04-brut1
apktool.bat d -s taskman_2.apk 生成一个taskman_2的文件夹
5 把classes.dex复制到C:\tools\dex2jar-0.0.7.11-SNAPSHOT\dex2jar-0.0.7.11-SNAPSHOT
cd /d C:\tools\dex2jar-0.0.7.11-SNAPSHOT\dex2jar-0.0.7.11-SNAPSHOT
dex2jar.bat classes.dex 生成 classes_dex2jar.jar
6 通过jd-gui.cfg工具查看classes_dex2jar.jar