Widget中PendingIntent和RemoteViews用法
PendingIntent是指把Intent包装了一层, 并且把PendingIntent放入一个新的进程. 通过触发事件去触发这个PendingIntent.
创建PendingIntent方法.
1. getActivity(Context context, int requestCode, Intent intent, int flags)
2. getBroadcast(Context context, int requestCode, Intent intent, int flags)
3. getService(Context context, int requestCode, Intent intent, int flags)
例子:
在/res/xml中新建一个example_appwidget.xml
<?xml version="1.0" encoding="utf-8"?><appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"android:minWidth="294dp" android:minHeight="72dp"android:updatePeriodMillis="86400000" android:initialLayout="@layout/example_appwidget_info"></appwidget-provider>
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="match_parent"android:layout_height="match_parent"><TextView android:text="firstWidgetText" android:background="#000000"android:id="@+id/widgetTextId" android:layout_width="fill_parent"android:layout_height="wrap_content"></TextView><Button android:layout_width="match_parent" android:id="@+id/button1" android:text="Button" android:layout_height="wrap_content"></Button></LinearLayout>
package com.cn;import android.app.PendingIntent;import android.appwidget.AppWidgetManager;import android.appwidget.AppWidgetProvider;import android.content.Context;import android.content.Intent;import android.widget.RemoteViews;public class ExampleAppWidgetProvider extends AppWidgetProvider {@Overridepublic void onDeleted(Context context, int[] appWidgetIds) {System.out.println("onDeleted");super.onDeleted(context, appWidgetIds);}@Overridepublic void onDisabled(Context context) {System.out.println("onDisabled");super.onDisabled(context);}@Overridepublic void onEnabled(Context context) {System.out.println("onEnabled");super.onEnabled(context);}@Overridepublic void onReceive(Context context, Intent intent) {System.out.println("onReceive");super.onReceive(context, intent);}@Overridepublic void onUpdate(Context context, AppWidgetManager appWidgetManager,int[] appWidgetIds) {System.out.println("onUpdate");for (int i = 0; i < appWidgetIds.length; i++) {System.out.println(appWidgetIds[i]);//创建一个intent对象Intent intent = new Intent(context,TargetActivity.class);//创建一个PendingIntentPendingIntent pending = PendingIntent.getActivity(context, 0, intent, 0);RemoteViews remoteViews = new RemoteViews(context.getPackageName(),R.layout.example_widget);//第一个参数用来指定绑定事件的id//第二个参数指定事件发生时, 哪个pendingIntent会被执行remoteViews.setOnClickPendingIntent(R.id.button1, pending);//第一个参数是更新哪个appwidget的id//第二个是传remoteViewappWidgetManager.updateAppWidget(appWidgetIds[i], remoteViews);}super.onUpdate(context, appWidgetManager, appWidgetIds);}}<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.cn" android:versionCode="1" android:versionName="1.0"> <uses-sdk android:minSdkVersion="10" /> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".Appwidget2Activity" 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"> <!-- 指定广播接收 --> <intent-filter> <action android:name="android.appwidget.action.APPWIDGET_UPDATE"></action> </intent-filter> <!-- appwidget的源文件 --> <meta-data android:name="android.appwidget.provider" android:resource="@xml/example_appwidget_info"></meta-data> </receiver><activity android:name="TargetActivity"></activity> </application></manifest>
package com.cn;import android.app.Activity;import android.os.Bundle;public class TargetActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);}}