Android(安卓)Widget开发

把AppWidget添加到桌面后，点击AppWidget后AppWidget文本会轮回改变

main.xml布局文件:

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="fill_parent"android:id="@+id/layout" android:layout_height="fill_parent"><Button android:text="@string/login" android:id="@+id/TextView01"android:clickable="true" android:layout_width="wrap_content"android:layout_height="wrap_content"></Button></LinearLayout>

res/xml/widget.xml布局文件:

<?xml version="1.0" encoding="UTF-8"?><!-- AppWidgetProvderInfo: 描述AppWidget的大小、更新频率和初始界面等信息，以XML文件形式存在于应用的res/xml/目录下。 注意：SDK1.5之后此android:updatePeriodMillis就失效了，要自己创建service更新 --><appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"android:minWidth="60dp" android:minHeight="30dp"android:updatePeriodMillis="86400000" android:initialLayout="@layout/main"></appwidget-provider>

AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"package="com.iaiai.activity" android:versionCode="1"android:versionName="1.0"><uses-sdk android:minSdkVersion="8" /><application android:icon="@drawable/icon" android:label="@string/app_name"><!-- <activity android:name="IaiaiActivity" android:theme="@android:style/Theme.NoTitleBar.Fullscreen" 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=".IaiaiWidget" android:label="添加桌面控件"><meta-data android:name="android.appwidget.provider"android:resource="@xml/widget"></meta-data><intent-filter><action android:name="com.iaiai.widget.click"></action><action android:name="android.appwidget.action.APPWIDGET_UPDATE" /></intent-filter></receiver></application></manifest>

变量类UtilTool.java：用来控件文本改变:

package com.iaiai.activity;/** *  * <p> * Title: UtilTool.java * </p> * <p> * E-Mail: [email protected] * </p> * <p> * QQ: 176291935 * </p> * <p> * Http: iaiai.iteye.com * </p> * <p> * Create time: 2011-6-24 * </p> *  * @author 丸子 * @version 0.0.1 */public class UtilTool {public static boolean isChange = true;}

IaiaiWidget.java类:

package com.iaiai.activity;import android.app.PendingIntent;import android.appwidget.AppWidgetManager;import android.appwidget.AppWidgetProvider;import android.content.ComponentName;import android.content.Context;import android.content.Intent;import android.util.Log;import android.widget.RemoteViews;/** *  * <p> * Title: IaiaiWidget.java * </p> * <p> * E-Mail: [email protected] * </p> * <p> * QQ: 176291935 * </p> * <p> * Http: iaiai.iteye.com * </p> * <p> * Create time: 2011-6-24 * </p> *  * @author 丸子 * @version 0.0.1 */public class IaiaiWidget extends AppWidgetProvider {private static final String CLICK_NAME_ACTION = "com.iaiai.widget.click";private static RemoteViews rv;@Overridepublic void onReceive(Context context, Intent intent) {super.onReceive(context, intent);Log.i("**************", "onReceive");if (rv == null) {rv = new RemoteViews(context.getPackageName(), R.layout.main);}if (intent.getAction().equals(CLICK_NAME_ACTION)) {if (UtilTool.isChange) {rv.setTextViewText(R.id.TextView01, "abc");} else {rv.setTextViewText(R.id.TextView01, "123");}UtilTool.isChange = !UtilTool.isChange;AppWidgetManager appWidgetManger = AppWidgetManager.getInstance(context);int[] appIds = appWidgetManger.getAppWidgetIds(new ComponentName(context, IaiaiWidget.class));appWidgetManger.updateAppWidget(appIds, rv);} else {super.onReceive(context, intent);}}@Overridepublic void onUpdate(Context context, AppWidgetManager appWidgetManager,int[] appWidgetIds) {Log.i("**************", "onUpdate");final int N = appWidgetIds.length;for (int i = 0; i < N; i++) {int appWidgetId = appWidgetIds[i];updateAppWidget(context, appWidgetManager, appWidgetId);}}private void updateAppWidget(Context context,AppWidgetManager appWidgeManger, int appWidgetId) {rv = new RemoteViews(context.getPackageName(), R.layout.main);Intent intentClick = new Intent();intentClick.setAction(CLICK_NAME_ACTION);PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0,intentClick, 0);rv.setOnClickPendingIntent(R.id.TextView01, pendingIntent);appWidgeManger.updateAppWidget(appWidgetId, rv);}}

运行结果:

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