单击小部件时如何执行某些功能？

Question

我想在单击时更改一个布尔变量值和小部件的背景？ 这是小部件 xml 文件

    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#f15"
android:padding="@dimen/widget_margin"
android:id="@+id/appwidget_layout">


<TextView
    android:id="@+id/appwidget_text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_centerVertical="true"
    android:layout_margin="8dp"
    android:textColor="#ffffff"
    android:textSize="24sp"
    android:textStyle="bold|italic" />


<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/appwidget_button"/>

这里是小部件 java 活动

@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
    for (int appWidgetId : appWidgetIds) {

    RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.example_app_widget_provider);

        Intent intent = new Intent(context, ExampleAppWidgetProvider.class);
        intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);


        PendingIntent buttonPendingIntent = PendingIntent.getBroadcast(context, 0, intent, 0);
        views.setOnClickPendingIntent(R.id.appwidget_button, buttonPendingIntent);


        appWidgetManager.updateAppWidget(appWidgetId, views);
    }
}

public boolean buttonState = false;

@Override
public void onReceive(Context context, Intent intent) {

    RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.example_app_widget_provider);

    if (intent.getAction()!= null) {

        Bundle extras = intent.getExtras();

        if (buttonState) {
            buttonState = false;
            views.setInt(R.id.appwidget_layout, "setBackgroundColor", Color.GREEN);
            views.setInt(R.id.appwidget_text, "setBackgroundColor", Color.GREEN);
            Toast.makeText(context, "Clicked!!", Toast.LENGTH_SHORT).show();
        } else {
            buttonState = true;
            views.setInt(R.id.appwidget_layout, "setBackgroundColor", Color.RED);
            views.setInt(R.id.appwidget_text, "setBackgroundColor", Color.RED);
            Toast.makeText(context, "Clicked!!", Toast.LENGTH_SHORT).show();
        }


        AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
        appWidgetManager.updateAppWidget(new ComponentName(context, ExampleAppWidgetProvider.class),
                views);
    }
}

}

代码运行时，onRecieve方法中的部分没有被执行。我想知道如何接收来自发送意图的同一个小部件的点击，以便我可以修改它。
提前致谢

Answer 1

在您的Widget 类之上，创建一个静态变量，这将是您的onClick：

private static final String MyOnClick = "myOnClickTag";

定义一个辅助方法来自动创建每个PendingIntent：

protected PendingIntent getPendingSelfIntent(Context context, String action) {
    Intent intent = new Intent(context, getClass());
    intent.setAction(action);
    return PendingIntent.getBroadcast(context, 0, intent, 0);
}

将此onClick 标记设置为您的视图，如下所示：

remoteViews.setOnClickPendingIntent(R.id.button, 
getPendingSelfIntent(context, MyOnClick));

在您的 Widget 类中创建一个 onReceive 方法并在其中设置此 onClick 事件：

public void onReceive(Context context, Intent intent) {

    if (MyOnClick.equals(intent.getAction())){

    Bundle extras = intent.getExtras();

    if (buttonState) {
        buttonState = false;
        views.setInt(R.id.appwidget_layout, "setBackgroundColor", Color.GREEN);
        views.setInt(R.id.appwidget_text, "setBackgroundColor", Color.GREEN);
        Toast.makeText(context, "Clicked!!", Toast.LENGTH_SHORT).show();
    } else {
        buttonState = true;
        views.setInt(R.id.appwidget_layout, "setBackgroundColor", Color.RED);
        views.setInt(R.id.appwidget_text, "setBackgroundColor", Color.RED);
        Toast.makeText(context, "Clicked!!", Toast.LENGTH_SHORT).show();
    }

    AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
    appWidgetManager.updateAppWidget(new ComponentName(context, ExampleAppWidgetProvider.class),
            views);
    }
};

每当您设置标签的视图被按下时，onReceive 就会捕捉到它，并将执行与我们日常的标准 onClick 事件相同的操作

至于你的onUpdate：

public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds)    
{
    for (int appWidgetId : appWidgetIds) {

    RemoteViews remoteViews = new RemoteViews(context.getPackageName(),R.layout.widget_det);
    thisWidget = new ComponentName(context, MyWidgetProvider.class);    
    remoteViews.setOnClickPendingIntent(R.id.widget_button_stayarm, getPendingSelfIntent(context, MyOnClick1));
    remoteViews.setOnClickPendingIntent(R.id.widget_button_awayarm, getPendingSelfIntent(context, MyOnClick2));
    remoteViews.setOnClickPendingIntent(R.id.widget_button_dissarm, getPendingSelfIntent(context, MyOnClick3));
    remoteViews.setTextViewText(R.id.widget_textview_gpscoords, "gps cords");
    appWidgetManager.updateAppWidget(thisWidget, remoteViews);
 }
 }