Android Widget桌面组件创建
package com.king.android.speical;
import com.king.android.R;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ComponentName;
import android.content.Context;
import android.content.pm.PackageManager;
import android.widget.RemoteViews;
/**
* 描述：创建widget类
* 作者：Andy.Liu
* 时间： 2012-7-17 上午07:01:39
**/
public class ExampleAppWidgetProvider extends AppWidgetProvider {
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager,int[] appWidgetIds) {
final int N = appWidgetIds.length;
for(int i=0;i<N;i++){
int appWidgetId = appWidgetIds[i];
String titlePrefix = WidgetActivity.loadTitlePref(context, appWidgetId);
updateAppWidget(context, appWidgetManager, appWidgetId, titlePrefix);
}
super.onUpdate(context, appWidgetManager, appWidgetIds);
}
//当桌面组件删除时调用
@Override
public void onDeleted(Context context, int[] appWidgetIds) {
//删除appWidget
final int N = appWidgetIds.length;
for(int i =0;i<N;i++){
WidgetActivity.deleteTitlePref(context, appWidgetIds[i]);
}
}
//当AppWidtgetProvider提供的第一个组件删除时调用
@Override
public void onEnabled(Context context) {
PackageManager pm = context.getPackageManager();
pm.setComponentEnabledSetting(new ComponentName("com.king.android.special", ".ExampleBroadCastReceiver"), PackageManager.COMPONENT_ENABLED_STATE_ENABLED, PackageManager.DONT_KILL_APP);
}
//当AppWidtgetProvider提供的最后一个组件删除时调用
@Override
public void onDisabled(Context context) {
PackageManager pm = context.getPackageManager();
pm.setComponentEnabledSetting(new ComponentName("com.king.android.special", ".ExampleBroadCastReceiver"), PackageManager.COMPONENT_ENABLED_STATE_ENABLED, PackageManager.DONT_KILL_APP);
}
// 更新
static void updateAppWidget(Context context,AppWidgetManager appwidgetManager,int appWidgetId,String titlePrefix){
//构建 RemoteViews 对象对桌面组件进行更新
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.appwidget_provider);
//更新文本内容，指定布局组件
views.setTextViewText(R.id.appwidget_text, titlePrefix);
//将RemoteViews更新传入到AppWidget进行更新
appwidgetManager.updateAppWidget(appWidgetId, views);
}
}
package com.king.android.speical;
import java.util.ArrayList;
import android.appwidget.AppWidgetManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
/**
* 描述：创建广播类来接收的信息
* 作者：Andy.Liu
* 时间： 2012-7-17 上午07:03:30
**/
public class ExampleBroadcastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
//通过BroadCastReceiver来更新AppWidget
String action = intent.getAction();
if(action.equals(Intent.ACTION_TIMEZONE_CHANGED)||action.equals(Intent.ACTION_TIME_CHANGED)){
AppWidgetManager gm = AppWidgetManager.getInstance(context);
ArrayList<Integer> appWidgetIds = new ArrayList<Integer>();
ArrayList<String> texts = new ArrayList<String>();
WidgetActivity.loadAllTitlePrefs(context, appWidgetIds, texts);
// 更新所有AppWidget
final int N = appWidgetIds.size();
for(int i=0;i<N;i++){
ExampleAppWidgetProvider.updateAppWidget(context,gm,appWidgetIds.get(i),texts.get(i));
}
}
}
}
package com.king.android.speical;
import java.util.ArrayList;
import android.app.Activity;
import android.appwidget.AppWidgetManager;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import com.king.android.R;
public class WidgetActivity extends Activity
{
private static final String
PREFS_NAME
= "com.king.android.ExampleAppWidgetProvider";
private static final String
PREF_PREFIX_KEY
= "prefix_";
int
mAppWidgetId
= AppWidgetManager.INVALID_APPWIDGET_ID;
EditText
mAppWidgetPrefix;
public WidgetActivity()
{
super();
}
public void onCreate(Bundle icicle)
{
super.onCreate(icicle);
setResult(RESULT_CANCELED);
setContentView(R.layout.appwidget_configure);
mAppWidgetPrefix = (EditText) findViewById(R.id.appwidget_prefix);
findViewById(R.id.save_button).setOnClickListener(mOnClickListener);
Intent intent = getIntent();
Bundle extras = intent.getExtras();
if (extras != null)
{
mAppWidgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
}
if (mAppWidgetId == AppWidgetManager.INVALID_APPWIDGET_ID)
{
finish();
}
mAppWidgetPrefix.setText(loadTitlePref(WidgetActivity.this, mAppWidgetId));
}
View.OnClickListener
mOnClickListener
= new View.OnClickListener()
{
public void onClick(View v)
{
final Context context = WidgetActivity.this;
String titlePrefix = mAppWidgetPrefix.getText().toString();
saveTitlePref(context, mAppWidgetId, titlePrefix);
//取得AppWidgetManager实例
AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
//更新AppWidget
ExampleAppWidgetProvider.updateAppWidget(context, appWidgetManager, mAppWidgetId, titlePrefix);
Intent resultValue = new Intent();
resultValue.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, mAppWidgetId);
setResult(RESULT_OK, resultValue);
finish();
}
};
static void saveTitlePref(Context context, int appWidgetId, String text)
{
SharedPreferences.Editor prefs = context.getSharedPreferences(PREFS_NAME, 0).edit();
prefs.putString(PREF_PREFIX_KEY + appWidgetId, text);
prefs.commit();
}
static String loadTitlePref(Context context, int appWidgetId)
{
SharedPreferences prefs = context.getSharedPreferences(PREFS_NAME, 0);
String prefix = prefs.getString(PREF_PREFIX_KEY + appWidgetId, null);
if (prefix != null)
{
return prefix;
}
else
{
return "xxxxxxxxxxxxxxxxx";
}
}
static void deleteTitlePref(Context context, int appWidgetId)
{
}
static void loadAllTitlePrefs(Context context, ArrayList<Integer> appWidgetIds, ArrayList<String> texts)
{
}
}
<?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="wrap_content"
android:orientation="vertical"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<EditText
android:id="@+id/appwidget_prefix"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<Button
android:id="@+id/save_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@android:string/ok"
/>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
android:minWidth="100dp"
android:minHeight="50dp"
android:updatePeriodMillis="86400000"
android:initialLayout="@layout/appwidget_provider"/>
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/appwidget_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>