由于TabActivity在Android4.0以后已经被完全弃用,那么我就不再浪费口水继续讲解它了,取而代之的是Fragment。Fragment是Android3.0新增的概念,Fragment翻译成中文是碎片的意思,不过却和Activity十分的相似,这一篇我花大量的篇幅来详细的讲解Fragment的介绍和使用方法。
一、Fragment的基础知识介绍
1.1概述
1.1.1 特性
Fragment是activity的界面中的一部分或一种行为。可以把多个Fragment组合到一个activity中来创建一个多界面
并且可以在多个activity中重用一个Fragment。可以把Fragment任务模块化的一段activity,它具有自己的生命周期,
接收它自己的事件,并可以在activity运行时被添加或删除。
Fragment不能独立存在,它必须嵌入到activity中,而且Fragment的生命周期直接受所在的activity的影响。例
如:当activity暂停时,他拥有的所有的Fragment都暂停了,当activity销毁时,他拥有的所有Fragment都被销毁。然
而,当activity运行时(在onResume()之后,onPause()之前),可以单独地操作每个Fragment,比如添加或删除它
们。当中执行上述针对Fragment的事务时,可以将事务添加到一个栈中,这个栈被activity管理,栈中的每一条都是一
个Fragment的一次事务。有了这个栈,就可以反向执行Fragment的事务,这样就可以在Fragment级支持“返回”键
(向后导航)。
当向activity中添加一个Fragment时,它须置于ViewGroup控件中,并且需定义Fragment自己的界面。可以在
layout.xml布局文件中声明Fragment,元素为:<fragment>;也可以在代码中创建Fragment,然后把它加入到
ViewGroup控件中。然而,Fragment不一定非要放在activity的界面中,它可以隐藏在后台为activity工作。
1.1.2 生命周期
onCreate():
当创建fragment时系统调用此方法。在其中必须初始化fragment的基础组件们。可参考activity的说明;
onCreateView():
系统在fragment要画自己的界面时调用(在真正显示之前)此方法,这个方法必须返回fragment的layout的根控
件,如果这个fragment不提供界面,那它应返回null;
onPause():
大多数程序应最少对fragment实现这三个方法,当然还有其它几个回调方法可应该按情况实现之,所有的声明周期
回调函数在“操控fragment的生命周期”一节中有详细讨论。
下图为fragment的生命周期(它所在的activity处于运行状态)
Activity和Fragment生命周期对比图如下:
两个的生命周期很类似,也息息相关。
1.1.3 派生类
DialogFragment
显示一个浮动的对话框。使用这个类创建对话框是替代activity创建对话框的最佳选择。因为可以把fragmentdialog
放入到activity的返回栈中,使用户能再返回到这个对话框。
ListFragment
显示一个列表控件,就像ListActivity类,它提供了很多管理列表的方法,比如onListItemClick()方法响应click事件。
PreferenceFragment
显示一个由Preference对象组成的列表,与PreferenceActivity相同。它用于为程序创建“设置”activity。
1.2 范例
写一个读新闻的程序,可以用一个fragment显示标题列表,另一个fragment显示选中标题的内容,这两个fragment
都在一个activity上,并排显示。那么这两个fragment都有自己的生命周期并响应自己感兴趣的事件。于是,不需要再
像手机上那样用一个activity显示标题列表,用另一个activity显示新闻内容;现在可以把两者放在一个activity上同时显
示出来。如下图:
Fragment必须被写成可重用的模块。因为fragment有自己的layout,自己进行事件响应,拥有自己的生命周期和
行为,所以可以在多个activity中包含同一个Fragment的不同实例。这对于让世界在不同的屏幕尺寸下都能给用户完美
的体验尤其重要。比如可以在程序运行于大屏幕中时启动包含很多fragment的activity,而在运行小屏幕时启动一个包
含少量fragment的activity。
刚才读新闻的程序,当检测到程序运行于大屏幕时,启动activityA,将标题列表和新闻内容这两个fragment都放
在activityA中;当检测到程序运行于小屏幕时,还是启动activityA,但此时A中只有标题列表fragment,当选中一个标
题时,activityA启动activityB,B中含有新闻内容fragment。
1.3 创建Fragment
要创建fragment,必须从Fragment或Fragment的派生类派生出一个类。Fragment的代码写起来有些像activity。
它具有跟activity一样的回调方法,比如onCreate(),onStart(),onPause()和onStop()。实际上,如果想把老的程序改为
使用fragment,基本上只需要把activity的回调方法的代码移到fragment中对应的方法即可。
1.3.1添加有界面的Fragment
Fragment一般作为activity的用户界面的一部分,把它自己layout嵌入到activity的layout中。一个要为fragment提
供layout,必须实现onCreateView()回调方法,然后在这个方法中返回一个View对象,这个对象时fragment的layout的
根。
注意:如果fragment是从ListFragment中派生的,就不需要实现onCreateView()方法了,因为默认的实现已经返
回了ListView控件对象。
要从onCreateView()方法中返回layout对象,可以从layout.xml布局文件中生成layout对象。为了帮助这样做,
onCreateView()提供了一个layoutInflater对象。举例:以下代码展示了一个Fragment的子类如何从layout.xml布局文件
example_fragment.xml中生成对象。
public static ExampleFragment extends Fragment { @Override publicView onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { returninflater.inflate(R.layout.example_fragment, container, false); } }
方法一:在activity的layout.xml文件中声明fragment
<?xmlversionxmlversion="1.0" encoding="utf-8" ?> <LinearLayoutxmlns:androidLinearLayoutxmlns:android=" http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="match_parent" > <fragmentandroid:namefragmentandroid:name="com.android.cwj.ArticleListFragment" android:id="@+id/list" android:layout_weight="1" android:layout_width="0dp" android:layout_height="match_parent" /> <fragmentandroid:namefragmentandroid:name="com.android.cwj.ArticleReaderFragment" android:id="@+id/viewer" android:layout_weight="2" android:layout_width="0dp" android:layout_height="match_parent" /> </LinearLayout>
FragmentManager fragmentManager = getFragmentManager(); FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
FragmentManager fragmentManager = getFragmentManager(); FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
//创建一个fragment Fragment newFragment = new ExampleFragment(); //实例化fragment事务管理器 FragmentTransaction transaction = getFragmentManager().beginTransaction(); //用新创建的fragment来代替fragment_container transaction.replace(R.id.fragment_container,newFragment); //添加进栈中 transaction.addToBackStack(null); //提交事务 transaction.commit();
<?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:layout_width="wrap_content" android:layout_height="wrap_content" android:text="无线和网络" android:textSize="30sp" /> <TextView android:layout_width="match_parent" android:layout_height="1px" android:background="@color/lineColor" /> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:layout_marginLeft="10dp" android:orientation="horizontal" > <TextView android:id="@+id/wifi" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:text="WI-Fi" android:textSize="30sp" /> <ToggleButton android:id="@+id/toggleButton" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:layout_marginLeft="20dp" android:text="开" /> </LinearLayout> <TextView android:layout_width="match_parent" android:layout_height="1px" android:background="@color/lineColor" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="设备" android:textSize="30sp" /> <TextView android:layout_width="match_parent" android:layout_height="1px" android:background="@color/lineColor" /> <TextView android:id="@+id/saveBut" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:text="存储" android:textSize="35sp" /> </LinearLayout>
<span style="font-size:12px;"><?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:background="@color/right" android:orientation="vertical" > <RelativeLayout android:id="@+id/save" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_margin="10dp" android:visibility="gone" > <include layout="@layout/save" /> </RelativeLayout> <RelativeLayout android:id="@+id/wifi" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_margin="10dp" android:visibility="gone" > <include layout="@layout/wifi" /> </RelativeLayout> </LinearLayout></span>
<LinearLayout 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:orientation="horizontal" tools:context=".AndroidFragmentActivity" > <!-- 主頁面 --> <!-- 左边页面 --> <fragment android:id="@+id/frag_list" android:name="co.cm.fragement.FragementList" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="2" /> <!-- 右面页面 --> <fragment android:id="@+id/frag_detail" android:name="co.cm.fragement.FragementDetails" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="1" /> </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:background="@color/left" android:orientation="horizontal" > <ImageView android:id="@+id/img" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <TextView android:id="@+id/txt_title" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Large Text" android:textAppearance="?android:attr/textAppearanceLarge" /> </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:layout_width="match_parent" android:layout_height="1px" android:background="@color/lineColor" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:text="内部存储空间" android:textSize="30sp" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginBottom="5dp" android:layout_marginLeft="10dp" android:layout_marginTop="5dp" android:text="1GB/1.98GB" android:textSize="20sp" /> <TextView android:layout_width="match_parent" android:layout_height="1px" android:background="@color/lineColor" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="20dp" android:text="总容量" android:textSize="30sp" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginBottom="5dp" android:layout_marginLeft="20dp" android:layout_marginTop="5dp" android:text="1.98GB" android:textSize="20sp" /> <TextView android:layout_width="match_parent" android:layout_height="1px" android:background="@color/lineColor" /> </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/wifi_name" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="qinjin_tp_2" /> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="信号强度 :" /> <TextView android:id="@+id/wifi_name_state" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="还没有连接" /> </LinearLayout> </LinearLayout>
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <LinearLayout android:id="@+id/wifiLinear" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" > <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="MAC地址 :" android:textSize="@dimen/textsize" /> <TextView android:id="@+id/mac_address" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="MAC地址 " android:textSize="@dimen/textsize" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="接入点的BSSID :" android:textSize="@dimen/textsize" /> <TextView android:id="@+id/bssid" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="接入点的BSSID " android:textSize="@dimen/textsize" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="IP地址: " android:textSize="@dimen/textsize" /> <TextView android:id="@+id/ip_address" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="IP地址 " android:textSize="@dimen/textsize" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="id " android:textSize="@dimen/textsize" /> <TextView android:id="@+id/id" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="id " android:textSize="@dimen/textsize" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text=" WifiInfo的所有信息包 " android:textSize="@dimen/textsize" /> <TextView android:id="@+id/info" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="WifiInfo的所有信息包 " android:textSize="@dimen/textsize" /> </LinearLayout> <ListView android:id="@+id/listview" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_marginBottom="2dp" > </ListView> </LinearLayout> <TextView android:id="@+id/wifiText" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:text="要查看可用的网络,请打开wifi" android:textSize="@dimen/textsize" /> </RelativeLayout>
package co.cm.fragement; import co.cm.fragement.R; import android.app.Activity; import android.content.Context; import android.os.Bundle; public class AndroidFragmentActivity extends Activity { // 主activity @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); WifiAdmin.getWifiAdmin().setmContext(AndroidFragmentActivity.this); WifiAdmin.getWifiAdmin().getWifiMeathod(); } }
package co.cm.fragement; import co.cm.fragement.R; import android.app.Fragment; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.CompoundButton; import android.widget.CompoundButton.OnCheckedChangeListener; import android.widget.LinearLayout; import android.widget.TextView; import android.widget.ToggleButton; /** * @author yuyang * 功能描述:左面fragment界面类,该类提供了选项操作 */ public class FragementList extends Fragment { //点击切换到wifi存储界面 private TextView wifi; //点击切换到save存储界面 private TextView saveBut; //定义右面fragment实例 private FragementDetails frag_detail; //打开关闭wifi按钮 private ToggleButton toggleButton; //toggleButton按钮是否被点击 private boolean isChecked = false; //监听button状态线程标志位 private boolean butIsRunning = false; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) { // 在这里初始化fragment的页面 return inflater.inflate(R.layout.frag_list, container, false); } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); // 由于fragment不是activity,不是oncreated,而是onActivityCreated setView(); setListener(); startThread();// 启动控制button的线程,当wifi状态不是在1或者3的时候,不可点击, // if (frag != null && frag.isInLayout()) { // switch (arg2) { // case 0: // frag.setText("0000"); } /** * 给按钮设置监听 */ public void setListener() { saveBut.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { frag_detail.setSaveShow(); } }); wifi.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { frag_detail.setWifiShow(); Log.i("111", WifiAdmin.getWifiAdmin().checkState() + "===-=-"); checktoggleButton();// 当点回到wifi界面时,刷新button的状态 } }); toggleButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Log.i("111", isChecked + "/" + WifiAdmin.getWifiAdmin().checkState()); if (isChecked) { WifiAdmin.getWifiAdmin().OpenWifi(); frag_detail.setWifiShow(); // toggleButton.setText("关闭"); toggleButton.setChecked(false); isChecked = false; } else { WifiAdmin.getWifiAdmin().CloseWife(); frag_detail.setWifiShow(); // toggleButton.setText("打开"); toggleButton.setChecked(true); isChecked = true; } toggleButton.setClickable(false); } }); } // public void checktoggleButton() { if (WifiAdmin.getWifiAdmin().checkState() == 1) { toggleButton.setChecked(true); isChecked = true; } if (WifiAdmin.getWifiAdmin().checkState() == 3) { toggleButton.setChecked(false); isChecked = false; } } public void setView() { wifi = (TextView) getView().findViewById(R.id.wifi); toggleButton = (ToggleButton) getView().findViewById(R.id.toggleButton); saveBut = (TextView) getView().findViewById(R.id.saveBut); // 实例化右面界面,以便操纵里面的方法F frag_detail = (FragementDetails) getFragmentManager().findFragmentById(R.id.frag_detail); // 初始化button的装态 if (WifiAdmin.getWifiAdmin().checkState() == 3) { toggleButton.setChecked(false); isChecked = false; } if (WifiAdmin.getWifiAdmin().checkState() == 1) { toggleButton.setChecked(true); isChecked = true; } toggleButton.setClickable(true); } @Override public void onDestroy() { frag_detail.stopWifiThread(); butIsRunning = false; super.onDestroy(); } private void startThread() { butIsRunning = true; new Thread(new Runnable() { @Override public void run() { while (butIsRunning) { //只有wifi状态改变变化完毕之后才能允许点击按钮 if (WifiAdmin.getWifiAdmin().checkState() == 3) { if (!isChecked) { toggleButton.setClickable(true); } } else if (WifiAdmin.getWifiAdmin().checkState() == 1) { if (isChecked) { toggleButton.setClickable(true); } } } } }).start(); } }
package co.cm.fragement; import java.util.ArrayList; import java.util.List; import co.cm.fragement.R; import android.app.Fragment; import android.net.wifi.ScanResult; import android.net.wifi.WifiConfiguration; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.RelativeLayout; import android.widget.TextView; /** * @author yangyu * 功能描述:右面fragment界面类,该类实现了右面显示的操作 */ public class FragementDetails extends Fragment { private TextView mac_address, bssid, ip_address, id, info, wifiText; private ListView listView; private LinearLayout wifiLinear; private RelativeLayout save, wifi; private boolean ThreadFlag = false; //wifi数据适配器 private WifiAdapter wifiAdapter; // 扫描出的网络连接列表 private List<ScanResult> mWifiList = new ArrayList<ScanResult>(); // 网络连接列表 private List<WifiConfiguration> mWifiConfiguration = null; private int nowWifiState = 0; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) { return inflater.inflate(R.layout.frag_detail, container, false); } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); setView(); // setListener(); setWifiShow(); } /** * 显示wifi界面 */ public void setWifiShow() { //通过隐藏显示来达到不同页面内容的切换 save.setVisibility(View.GONE); wifi.setVisibility(View.VISIBLE); stopWifiThread(); refreshWifi(); } /** * 显示保存界面 */ public void setSaveShow() { stopWifiThread(); save.setVisibility(View.VISIBLE); wifi.setVisibility(View.GONE); } /** * 初始化组件 */ public void setView() { // -----------------wifi----------------- wifiText = (TextView) getView().findViewById(R.id.wifiText); mac_address = (TextView) getView().findViewById(R.id.mac_address); bssid = (TextView) getView().findViewById(R.id.bssid); ip_address = (TextView) getView().findViewById(R.id.ip_address); id = (TextView) getView().findViewById(R.id.id); info = (TextView) getView().findViewById(R.id.info); listView = (ListView) getView().findViewById(R.id.listview); wifiLinear = (LinearLayout) getView().findViewById(R.id.wifiLinear); save = (RelativeLayout) getView().findViewById(R.id.save); wifi = (RelativeLayout) getView().findViewById(R.id.wifi); wifiAdapter = new WifiAdapter(); listView.setAdapter(wifiAdapter); } private Handler handler = new Handler() { @Override public void handleMessage(Message msg) { nowWifiState = WifiAdmin.getWifiAdmin().checkState(); // 当wifi打开时,刷新wifi列表的内容 if (nowWifiState == 3) { mWifiList = WifiAdmin.getWifiAdmin().GetWifiList(); // 如果刚开始检测的wifi列表为空,则创建一个实例化的wifi而不是null,负责会在adpter里面报错 if (mWifiList != null) { // 如果wifi列表发生改变,则更新,else不更新 if (!mWifiList.toString().equals( WifiAdmin.getWifiAdmin().getLastWifiList().toString())) { WifiAdmin.getWifiAdmin().setLastWifiList(mWifiList); wifiAdapter.notifyDate(); } } else { mWifiList = new ArrayList<ScanResult>(); } } refreshMeathod(); super.handleMessage(msg); } }; /** * 刷新wifi的状态 */ public void refreshWifi() { new Thread(new Runnable() { @Override public void run() { ThreadFlag = true; while (ThreadFlag) { // Log.i("111", WifiAdmin.getWifiAdmin().checkState() + // "!!!"); Message msg = handler.obtainMessage(); handler.sendMessage(msg); try { Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } } } }).start(); } public void refreshMeathod() { // 此处可用switch if (nowWifiState == 3) { wifiLinear.setVisibility(View.VISIBLE); wifiText.setVisibility(View.INVISIBLE); mac_address.setText(WifiAdmin.getWifiAdmin().GetMacAddress() + ""); bssid.setText(WifiAdmin.getWifiAdmin().GetBSSID() + ""); ip_address.setText(WifiAdmin.getWifiAdmin().GetIPAddress() + ""); id.setText(WifiAdmin.getWifiAdmin().GetNetworkId() + ""); info.setText(WifiAdmin.getWifiAdmin().GetWifiInfo() + ""); } else if (nowWifiState == 1) { wifiText.setVisibility(View.VISIBLE); wifiLinear.setVisibility(View.INVISIBLE); wifiText.setText("要查看可用的网络,请打开wifi"); } else if (nowWifiState == 2) { wifiText.setVisibility(View.VISIBLE); wifiLinear.setVisibility(View.INVISIBLE); wifiText.setText("wifi正在打开"); } else if (nowWifiState == 4) { wifiText.setVisibility(View.VISIBLE); wifiLinear.setVisibility(View.INVISIBLE); wifiText.setText("wifi正在关闭"); } else { wifiText.setVisibility(View.VISIBLE); wifiLinear.setVisibility(View.INVISIBLE); wifiText.setText("我不知道wifi正在做什么"); } } public void stopWifiThread() { ThreadFlag = false; } public class WifiAdapter extends BaseAdapter { @Override public int getCount() { return mWifiList.size(); } @Override public Object getItem(int position) { return mWifiList.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { View view = convertView; final ChatViewHolder vh; if (convertView == null) { vh = new ChatViewHolder(); view = View.inflate(WifiAdmin.getWifiAdmin().getmContext(), R.layout.wifi_list, null); vh.wifi_name = (TextView) view.findViewById(R.id.wifi_name); vh.wifi_name_state = (TextView) view .findViewById(R.id.wifi_name_state); view.setTag(vh); } else { vh = (ChatViewHolder) view.getTag(); } vh.wifi_name.setText(mWifiList.get(position).SSID.toString());// 网络的名字,唯一区别WIFI网络的名字 vh.wifi_name_state.setText(mWifiList.get(position).level + ""); return view; } public void notifyDate() { notifyDataSetChanged(); } } public class ChatViewHolder { TextView wifi_name;// 网络的名字,唯一区别WIFI网络的名字 TextView wifi_name_state;// 所发现的WIFI网络信号强度 } }
package co.cm.fragement; import java.util.ArrayList; import java.util.List; import android.content.Context; import android.net.wifi.ScanResult; import android.net.wifi.WifiConfiguration; import android.net.wifi.WifiInfo; import android.net.wifi.WifiManager; import android.net.wifi.WifiManager.WifiLock; import android.util.Log; /** * @author yangyu * wifiAdmin提供了wifi操作的方法 */ public class WifiAdmin { private static WifiAdmin wifiAdmin; private WifiManager mWifiManager = null; private WifiInfo mWifiInfo = null; // 扫描出的网络连接列表 private List<ScanResult> mWifiList = new ArrayList<ScanResult>(); // 扫描出的网络连接列表 private List<ScanResult> lastWifiList = new ArrayList<ScanResult>(); // 网络连接列表 private List<WifiConfiguration> mWifiConfiguration = null; private WifiLock mWifiLock = null; // 上次网络状态 private int lastWifiState = 0; //定义上下文Context Context mContext; public List<ScanResult> getLastWifiList() { return lastWifiList; } public void setLastWifiList(List<ScanResult> lastWifiList) { this.lastWifiList = lastWifiList; } public int getLastWifiState() { return lastWifiState; } public void setLastWifiState(int lastWifiState) { this.lastWifiState = lastWifiState; } public static WifiAdmin getWifi() { return wifiAdmin; } public Context getmContext() { return mContext; } public void setmContext(Context mContext) { this.mContext = mContext; } public static WifiAdmin getWifiAdmin() { if (wifiAdmin == null) { wifiAdmin = new WifiAdmin(); } return wifiAdmin; } public void getWifiMeathod() { mWifiManager = (WifiManager) mContext .getSystemService(mContext.WIFI_SERVICE); mWifiInfo = mWifiManager.getConnectionInfo(); } /** * 打开wifi */ public void OpenWifi() { if (!mWifiManager.isWifiEnabled()) { mWifiManager.setWifiEnabled(true); } else { Log.i("111", "open 失败"); } } /** * 关闭wifi */ public void CloseWife() { if (mWifiManager.isWifiEnabled()) { mWifiManager.setWifiEnabled(false); } else { Log.i("111", "close 失败"); } } /** * 锁定wifi */ public void lockWifi() { mWifiLock.acquire(); } public void rlockWifi() { if (mWifiLock.isHeld()) { mWifiLock.acquire(); } } // 检查当前wifi状态WIFI网卡的状态是由一系列的整形常量来表示的。 //1.WIFI_STATE_DISABLED : WIFI网卡不可用(1) //2.WIFI_STATE_DISABLING : WIFI网卡正在关闭(0) //3.WIFI_STATE_ENABLED : WIFI网卡可用(3) //4.WIFI_STATE_ENABLING : WIFI网正在打开(2) (WIFI启动需要一段时间) //5.WIFI_STATE_UNKNOWN : 未知网卡状态 public int checkState() { return mWifiManager.getWifiState(); } /** * 创建一个wifilock */ public void Createwifilock() { mWifiLock = mWifiManager.createWifiLock("Testss"); } /** * 得到配置好的网络 * @return */ public List<WifiConfiguration> GetConfinguration() { return mWifiConfiguration; } /** * 连接配置好的指定ID的网络 * @param index */ public void ConnectConfiguration(int index) { if (index > mWifiConfiguration.size()) { return; } mWifiManager.enableNetwork(mWifiConfiguration.get(index).networkId,true); } /** * 开始扫描网络 */ public void StartScan() { mWifiManager.startScan(); // 得到扫描结果 mWifiList = mWifiManager.getScanResults(); // 得到配置好的网络连接 mWifiConfiguration = mWifiManager.getConfiguredNetworks(); } /** * 得到网络列表 * @return */ public List<ScanResult> GetWifiList() { mWifiManager.startScan(); // 得到扫描结果 mWifiList = mWifiManager.getScanResults(); return mWifiList; } public List<WifiConfiguration> getmWifiConfiguration() { return mWifiConfiguration; } /** * 查看扫描结果 */ public StringBuilder LookUpScan() { StringBuilder stringBuilder = new StringBuilder(); for (int i = 0; i < mWifiList.size(); i++) { stringBuilder.append("Index_" + new Integer(i + 1).toString() + ":"); // 将ScanResult信息转换成一个字符串包 // 其中把包括:BSSID、SSID、capabilities、frequency、level stringBuilder.append((mWifiList.get(i)).toString()); stringBuilder.append("\n"); } return stringBuilder; } /** * 得到MAC地址 */ public String GetMacAddress() { return (mWifiInfo == null) ? "NULL" : mWifiInfo.getMacAddress(); } /** * 得到接入点的BSSID */ public String GetBSSID() { return (mWifiInfo == null) ? "NULL" : mWifiInfo.getBSSID(); } /** * 得到IP地址 */ public int GetIPAddress() { return (mWifiInfo == null) ? 0 : mWifiInfo.getIpAddress(); } /** * 得到连接的ID */ public int GetNetworkId() { return (mWifiInfo == null) ? 0 : mWifiInfo.getNetworkId(); } /** * 得到WifiInfo的所有信息包 */ public String GetWifiInfo() { return (mWifiInfo == null) ? "NULL" : mWifiInfo.toString(); } /** * 添加一个网络并连接 */ public void AddNetwork(WifiConfiguration wcg) { int wcgID = mWifiManager.addNetwork(wcg); mWifiManager.enableNetwork(wcgID, true); } /** * 断开指定ID的网络 */ public void DisconnectWifi(int netId) { mWifiManager.disableNetwork(netId); mWifiManager.disconnect(); } }
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="50dip" android:background="@drawable/title_bg" android:orientation="horizontal" > <Button android:id="@+id/left_btn" style="@style/Text.Title_Button" android:layout_width="wrap_content" android:layout_height="35dip" android:layout_gravity="center_vertical" android:background="@drawable/title_btn_back" android:minWidth="60dip" /> <TextView android:id="@+id/title_text" style="@style/Text.Title" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:layout_weight="1" /> <Button android:id="@+id/right_btn" style="@style/Text.Title_Button" android:layout_width="wrap_content" android:layout_height="35dip" android:layout_gravity="center_vertical" android:background="@drawable/title_btn" android:minWidth="70dip" /> </LinearLayout>
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <com.eoe.tampletfragment.view.TitleView android:id="@+id/title" android:layout_width="fill_parent" android:layout_height="wrap_content" /> <TextView android:id="@+id/fragment_home_text" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/fragment_home_text" android:textSize="18sp" /> </LinearLayout>
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@drawable/activity_bg" android:orientation="vertical" > <com.eoe.tampletfragment.view.TitleView android:id="@+id/title" android:layout_width="fill_parent" android:layout_height="wrap_content" /> </LinearLayout>
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@drawable/activity_bg" android:orientation="vertical" > <fragment android:id="@+id/fragment_home" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1" class="com.eoe.tampletfragment.fragment.HomeFragment" /> <fragment android:id="@+id/fragment_search" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1" class="com.eoe.tampletfragment.fragment.SearchFragment" /> <fragment android:id="@+id/fragment_settings" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1" class="com.eoe.tampletfragment.fragment.SettingsFragment" /> <com.eoe.tampletfragment.fragment.FragmentIndicator android:id="@+id/indicator" android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="@drawable/tab_footer_bg" /> </LinearLayout>
package com.eoe.tampletfragment.view; import android.content.Context; import android.util.AttributeSet; import android.view.LayoutInflater; import android.view.View; import android.widget.Button; import android.widget.FrameLayout; import android.widget.TextView; import com.eoe.tampletfragment.R; /** * @author yangyu * 功能描述:自定义顶部工具栏 */ public class TitleView extends FrameLayout implements View.OnClickListener { private Button mLeftBtn; private Button mRightBtn; private TextView mTitle; private OnLeftButtonClickListener mOnLeftButtonClickListener; private OnRightButtonClickListener mOnRightButtonClickListener; public interface OnLeftButtonClickListener { public void onClick(View button); } public interface OnRightButtonClickListener { public void onClick(View button); } public void setLeftButton(String text, OnLeftButtonClickListener listener) { mLeftBtn.setText(text); mLeftBtn.setVisibility(View.VISIBLE); mOnLeftButtonClickListener = listener; } public void setLeftButton(int stringID, OnLeftButtonClickListener listener) { mLeftBtn.setText(stringID); mLeftBtn.setVisibility(View.VISIBLE); mOnLeftButtonClickListener = listener; } public void removeLeftButton() { mLeftBtn.setText(""); mLeftBtn.setVisibility(View.INVISIBLE); mOnLeftButtonClickListener = null; } public void hiddenLeftButton() { mLeftBtn.setVisibility(View.INVISIBLE); } public void showLeftButton() { mLeftBtn.setVisibility(View.VISIBLE); } public void setRightButton(String text, OnRightButtonClickListener listener) { mRightBtn.setText(text); mRightBtn.setVisibility(View.VISIBLE); mOnRightButtonClickListener = listener; } public void setRightButton(int stringID, OnRightButtonClickListener listener) { mRightBtn.setText(stringID); mRightBtn.setVisibility(View.VISIBLE); mOnRightButtonClickListener = listener; } public void removeRightButton() { mRightBtn.setText(""); mRightBtn.setVisibility(View.INVISIBLE); mOnRightButtonClickListener = null; } public void hiddenRightButton() { mRightBtn.setVisibility(View.INVISIBLE); } public void showRightButton() { mRightBtn.setVisibility(View.VISIBLE); } public TitleView(Context context) { this(context, null); } public TitleView(Context context, AttributeSet attrs) { this(context, attrs, 0); } public TitleView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); LayoutInflater inflater = (LayoutInflater) context .getSystemService(Context.LAYOUT_INFLATER_SERVICE); inflater.inflate(R.layout.title_view, this, true); mLeftBtn = (Button) findViewById(R.id.left_btn); mLeftBtn.setVisibility(View.INVISIBLE); mLeftBtn.setOnClickListener(this); mRightBtn = (Button) findViewById(R.id.right_btn); mRightBtn.setVisibility(View.INVISIBLE); mRightBtn.setOnClickListener(this); mTitle = (TextView) findViewById(R.id.title_text); mTitle.setVisibility(View.INVISIBLE); } public void setTitle(String text) { mTitle.setVisibility(View.VISIBLE); mTitle.setText(text); } public void setTitle(int stringID) { mTitle.setVisibility(View.VISIBLE); mTitle.setText(stringID); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.left_btn: if(mOnLeftButtonClickListener != null) mOnLeftButtonClickListener.onClick(v); break; case R.id.right_btn: if(mOnRightButtonClickListener != null) mOnRightButtonClickListener.onClick(v); break; } } }
package com.eoe.tampletfragment.fragment; import android.content.Context; import android.graphics.Color; import android.util.AttributeSet; import android.util.TypedValue; import android.view.Gravity; import android.view.View; import android.view.View.OnClickListener; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.TextView; import com.eoe.tampletfragment.R; /** * @author yangyu * 功能描述:自定义底部工具栏 */ public class FragmentIndicator extends LinearLayout implements OnClickListener { private int mDefaultIndicator = 0; private static int mCurIndicator; private static View[] mIndicators; private OnIndicateListener mOnIndicateListener; private static final String TAG_ICON_0 = "icon_tag_0"; private static final String TAG_ICON_1 = "icon_tag_1"; private static final String TAG_ICON_2 = "icon_tag_2"; private static final String TAG_TEXT_0 = "text_tag_0"; private static final String TAG_TEXT_1 = "text_tag_1"; private static final String TAG_TEXT_2 = "text_tag_2"; private static final int COLOR_UNSELECT = Color.argb(100, 0xff, 0xff, 0xff); private static final int COLOR_SELECT = Color.WHITE; private FragmentIndicator(Context context) { super(context); } public FragmentIndicator(Context context, AttributeSet attrs) { super(context, attrs); mCurIndicator = mDefaultIndicator; setOrientation(LinearLayout.HORIZONTAL); init(); } private View createIndicator(int iconResID, int stringResID, int stringColor, String iconTag, String textTag) { LinearLayout view = new LinearLayout(getContext()); view.setOrientation(LinearLayout.VERTICAL); view.setLayoutParams(new LinearLayout.LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 1)); view.setGravity(Gravity.CENTER_HORIZONTAL); ImageView iconView = new ImageView(getContext()); iconView.setTag(iconTag); iconView.setLayoutParams(new LinearLayout.LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 1)); iconView.setImageResource(iconResID); TextView textView = new TextView(getContext()); textView.setTag(textTag); textView.setLayoutParams(new LinearLayout.LayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 1)); textView.setTextColor(stringColor); textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, 16); textView.setText(stringResID); view.addView(iconView); view.addView(textView); return view; } private void init() { mIndicators = new View[3]; mIndicators[0] = createIndicator(R.drawable.ic_home_focused, R.string.tab_home, COLOR_SELECT, TAG_ICON_0, TAG_TEXT_0); mIndicators[0].setBackgroundResource(R.drawable.indic_select); mIndicators[0].setTag(Integer.valueOf(0)); mIndicators[0].setOnClickListener(this); addView(mIndicators[0]); mIndicators[1] = createIndicator(R.drawable.ic_search_normal, R.string.tab_search, COLOR_UNSELECT, TAG_ICON_1, TAG_TEXT_1); mIndicators[1].setBackgroundColor(Color.alpha(0)); mIndicators[1].setTag(Integer.valueOf(1)); mIndicators[1].setOnClickListener(this); addView(mIndicators[1]); mIndicators[2] = createIndicator(R.drawable.ic_settings_normal, R.string.tab_settings, COLOR_UNSELECT, TAG_ICON_2, TAG_TEXT_2); mIndicators[2].setBackgroundColor(Color.alpha(0)); mIndicators[2].setTag(Integer.valueOf(2)); mIndicators[2].setOnClickListener(this); addView(mIndicators[2]); } public static void setIndicator(int which) { // clear previous status. mIndicators[mCurIndicator].setBackgroundColor(Color.alpha(0)); ImageView prevIcon; TextView prevText; switch(mCurIndicator) { case 0: prevIcon =(ImageView) mIndicators[mCurIndicator].findViewWithTag(TAG_ICON_0); prevIcon.setImageResource(R.drawable.ic_home_normal); prevText = (TextView) mIndicators[mCurIndicator].findViewWithTag(TAG_TEXT_0); prevText.setTextColor(COLOR_UNSELECT); break; case 1: prevIcon =(ImageView) mIndicators[mCurIndicator].findViewWithTag(TAG_ICON_1); prevIcon.setImageResource(R.drawable.ic_search_normal); prevText = (TextView) mIndicators[mCurIndicator].findViewWithTag(TAG_TEXT_1); prevText.setTextColor(COLOR_UNSELECT); break; case 2: prevIcon =(ImageView) mIndicators[mCurIndicator].findViewWithTag(TAG_ICON_2); prevIcon.setImageResource(R.drawable.ic_settings_normal); prevText = (TextView) mIndicators[mCurIndicator].findViewWithTag(TAG_TEXT_2); prevText.setTextColor(COLOR_UNSELECT); break; } // update current status. mIndicators[which].setBackgroundResource(R.drawable.indic_select); ImageView currIcon; TextView currText; switch(which) { case 0: currIcon =(ImageView) mIndicators[which].findViewWithTag(TAG_ICON_0); currIcon.setImageResource(R.drawable.ic_home_focused); currText = (TextView) mIndicators[which].findViewWithTag(TAG_TEXT_0); currText.setTextColor(COLOR_SELECT); break; case 1: currIcon =(ImageView) mIndicators[which].findViewWithTag(TAG_ICON_1); currIcon.setImageResource(R.drawable.ic_search_focused); currText = (TextView) mIndicators[which].findViewWithTag(TAG_TEXT_1); currText.setTextColor(COLOR_SELECT); break; case 2: currIcon =(ImageView) mIndicators[which].findViewWithTag(TAG_ICON_2); currIcon.setImageResource(R.drawable.ic_settings_focused); currText = (TextView) mIndicators[which].findViewWithTag(TAG_TEXT_2); currText.setTextColor(COLOR_SELECT); break; } mCurIndicator = which; } public interface OnIndicateListener { public void onIndicate(View v, int which); } public void setOnIndicateListener(OnIndicateListener listener) { mOnIndicateListener = listener; } @Override public void onClick(View v) { if (mOnIndicateListener != null) { int tag = (Integer) v.getTag(); switch (tag) { case 0: if (mCurIndicator != 0) { mOnIndicateListener.onIndicate(v, 0); setIndicator(0); } break; case 1: if (mCurIndicator != 1) { mOnIndicateListener.onIndicate(v, 1); setIndicator(1); } break; case 2: if (mCurIndicator != 2) { mOnIndicateListener.onIndicate(v, 2); setIndicator(2); } break; default: break; } } } }
package com.eoe.tampletfragment.fragment; import android.content.Intent; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; import com.eoe.tampletfragment.HelpActivity; import com.eoe.tampletfragment.R; import com.eoe.tampletfragment.view.TitleView; import com.eoe.tampletfragment.view.TitleView.OnLeftButtonClickListener; import com.eoe.tampletfragment.view.TitleView.OnRightButtonClickListener; /** * @author yangyu * 功能描述:首页fragment页面 */ public class HomeFragment extends Fragment { private View mParent; private FragmentActivity mActivity; private TitleView mTitle; private TextView mText; /** * Create a new instance of DetailsFragment, initialized to show the text at * 'index'. */ public static HomeFragment newInstance(int index) { HomeFragment f = new HomeFragment(); // Supply index input as an argument. Bundle args = new Bundle(); args.putInt("index", index); f.setArguments(args); return f; } public int getShownIndex() { return getArguments().getInt("index", 0); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_home, container, false); return view; } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); mActivity = getActivity(); mParent = getView(); mTitle = (TitleView) mParent.findViewById(R.id.title); mTitle.setTitle(R.string.title_home); mTitle.setLeftButton(R.string.exit, new OnLeftButtonClickListener(){ @Override public void onClick(View button) { mActivity.finish(); } }); mTitle.setRightButton(R.string.help, new OnRightButtonClickListener() { @Override public void onClick(View button) { goHelpActivity(); } }); mText = (TextView) mParent.findViewById(R.id.fragment_home_text); } private void goHelpActivity() { Intent intent = new Intent(mActivity, HelpActivity.class); startActivity(intent); } @Override public void onHiddenChanged(boolean hidden) { super.onHiddenChanged(hidden); } @Override public void onDestroy() { super.onDestroy(); } }
package com.eoe.tampletfragment; import android.os.Bundle; import android.support.v4.app.FragmentActivity; import android.view.Window; /** * @author yangyu * 功能描述:帮助Activity界面 */ public class HelpActivity extends FragmentActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.activity_help); } }
package com.eoe.tampletfragment; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.view.View; import android.view.Window; import com.eoe.tampletfragment.fragment.FragmentIndicator; import com.eoe.tampletfragment.fragment.FragmentIndicator.OnIndicateListener; /** * @author yangyu * 功能描述:主Activity类,继承自FragmentActivity */ public class MainActivity extends FragmentActivity { public static Fragment[] mFragments; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.activity_main); setFragmentIndicator(0); } /** * 初始化fragment */ private void setFragmentIndicator(int whichIsDefault) { mFragments = new Fragment[3]; mFragments[0] = getSupportFragmentManager().findFragmentById(R.id.fragment_home); mFragments[1] = getSupportFragmentManager().findFragmentById(R.id.fragment_search); mFragments[2] = getSupportFragmentManager().findFragmentById(R.id.fragment_settings); getSupportFragmentManager().beginTransaction().hide(mFragments[0]) .hide(mFragments[1]).hide(mFragments[2]).show(mFragments[whichIsDefault]).commit(); FragmentIndicator mIndicator = (FragmentIndicator) findViewById(R.id.indicator); FragmentIndicator.setIndicator(whichIsDefault); mIndicator.setOnIndicateListener(new OnIndicateListener() { @Override public void onIndicate(View v, int which) { getSupportFragmentManager().beginTransaction() .hide(mFragments[0]).hide(mFragments[1]) .hide(mFragments[2]).show(mFragments[which]).commit(); } }); } @Override protected void onResume() { super.onResume(); } @Override protected void onPause() { super.onPause(); } }