我想为我的应用程序创建一个小部件。从我阅读的一篇安卓开发者网站上得知,所有的onclick监听器都需要有Intent。但是如果我只想让我的按钮在小部件本身中更新数据,而不想启动一个新活动呢?
以下是一些安卓演示代码:
Intent intent = new Intent(context, ExampleActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);
// Get the layout for the App Widget and attach an on-click listener
// to the button
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.appwidget_provider_layout);
views.setOnClickPendingIntent(R.id.button, pendingIntent);
我想要一个按钮,当我点击它时会进行一次http网络调用,然后将结果显示在小部件中。如果我必须使用意图,我该如何做?而且我需要能够区分哪个按钮被点击了。
为什么小部件使用意图而不是正常的onclick监听器,在那里调用类似于活动的函数?
编辑
我的小部件提供程序:
public class MyWidgetProvider extends AppWidgetProvider {
private static final String MyOnClick1 = "myOnClickTag1";
private static final String MyOnClick2 = "myOnClickTag2";
private static final String MyOnClick3 = "myOnClickTag3";
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
// Get all ids
ComponentName thisWidget = new ComponentName(context, MyWidgetProvider.class);
int[] allWidgetIds = appWidgetManager.getAppWidgetIds(thisWidget);
for (int widgetId : allWidgetIds) {
RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.widget_layout);
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(widgetId, remoteViews);
}
}
protected PendingIntent getPendingSelfIntent(Context context, String action) {
Intent intent = new Intent(context, getClass());
intent.setAction(action);
return PendingIntent.getBroadcast(context, 0, intent, 0);
}
@Override
public void onReceive(Context context, Intent intent) {
if (MyOnClick1.equals(intent.getAction())) {
// your onClick action is here
Toast.makeText(context, "Button1", Toast.LENGTH_SHORT).show();
Log.w("Widget", "Clicked button1");
} else if (MyOnClick2.equals(intent.getAction())) {
Toast.makeText(context, "Button2", Toast.LENGTH_SHORT).show();
Log.w("Widget", "Clicked button2");
} else if (MyOnClick3.equals(intent.getAction())) {
Toast.makeText(context, "Button3", Toast.LENGTH_SHORT).show();
Log.w("Widget", "Clicked button3");
}
};
}
我的Android清单文件:
<receiver
android:name="widget.MyWidgetProvider"
android:icon="@drawable/fsk"
android:label="FSK Widget" >
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
</intent-filter>
<meta-data
android:name="android.appwidget.provider"
android:resource="@xml/example_appwidget_info" />
</receiver>
getPendingSelfIntent(context, MyOnClick)
为什么在我的代码中被标记成红色下划线了? - Zapnologica