AppWidget使用方法

手机桌面小组件

public class AppWidget extends AppWidgetProvider {
    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
        Log.d("MyAppWidgetProvider", "调用了onUpdate方法");
        Intent intent = new Intent(context, MainActivity.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
        RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.remoteview);
        remoteViews.setImageViewResource(R.id.image, R.drawable.ic2);
        remoteViews.setTextViewText(R.id.text, "我是桌面小组件");
        remoteViews.setOnClickPendingIntent(R.id.image, pendingIntent);
        appWidgetManager.updateAppWidget(appWidgetIds, remoteViews);//用updateAppWidget来更新remoteViews的状态
    }

}

定义一个类继承AppWidgetProvider重写onupdate方法

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
    android:orientation="vertical"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/image"
        android:layout_width="match_parent"
        android:layout_height="200dp" />
    <TextView
        android:id="@+id/text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

自定义布局文件remoteView

<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
    android:initialLayout="@layout/remoteview"
    android:minWidth="100dp"
    android:minHeight="100dp"
    android:updatePeriodMillis="86400000">

</appwidget-provider>

xml文件appwidget

  <receiver android:name=".AppWidget">
            <meta-data
                android:name="android.appwidget.provider"
                android:resource="@xml/appwidget"/>
            <!--name的值是固定的，只能是android.appwidget.provider-->
            <intent-filter>
                <action android:name="android.appwidget.action.APPWIDGET_UPDATE"/><!--必须得有这个action-->
            </intent-filter>
        </receiver>

配置文件声明appwidget,运行后手机添加桌面小组件,点击图片会进入Pendingintent的activity