Question

我要更改布尔变量值以及单击它时小部件的背景吗？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"/>

这是小部件java的用法

@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);
    }
}

布尔布尔公共按钮状态= 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，不会执行onRecieve方法中的部分。我想知道如何从发送该意图的同一小部件接收点击，以便我可以对其进行修改。
预先感谢

Answer 1

在您的Widget类的顶部，创建一个静态变量，它将是您的onClick：

private static final String MyOnClick = "myOnClickTag";

定义一个帮助程序方法以自动创建每个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onReceive类中创建一个Widget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);
    }
};

每当按下设置标签的视图时，onReceive都会捕获该标签，并执行与我们日常的标准onClick事件相同的操作

关于您的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);
 }
 }

如何在点击小部件时执行某些功能？

1 个答案: