【发布时间】:2011-05-12 12:27:13
【问题描述】:
我正在尝试制作一个 Android 小部件,以显示我的应用中的一些信息。
我已经成功地展示了一些信息,但我知道我的应用程序中有什么功能可以“切换页面”。这意味着按下一个按钮,就会显示新信息。但我该怎么做?我尝试了不同的方法,最终得到以下代码:
public class HelloWidget extends AppWidgetProvider {
RemoteViews remoteViews;
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
Toast.makeText(context, "onUpdate", Toast.LENGTH_SHORT).show();
RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.widget_layout);
Intent intent = new Intent();
intent.setAction(TestReceiver.TEST_INTENT);
intent.setClassName(TestReceiver.class.getPackage().getName(), TestReceiver.class.getName());
PendingIntent pendingIntent = PendingIntent.getBroadcast(context.getApplicationContext(), 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
remoteViews.setOnClickPendingIntent(R.id.bbutton1, pendingIntent);
remoteViews.setTextViewText(R.id.widgetTxt, "The textview");
appWidgetManager.updateAppWidget(appWidgetIds[0], remoteViews);
super.onUpdate(context, appWidgetManager, appWidgetIds);
}
public class TestReceiver extends BroadcastReceiver {
public static final String TEST_INTENT = "MyTestIntent";
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "You reached the TestReceiver", Toast.LENGTH_SHORT).show();
if (intent.getAction() == TEST_INTENT) {
remoteViews.setTextViewText(R.id.widgetTxt, "Is changed");
}
}
}
@Override
public void onReceive(Context context, Intent intent) {
final String action = intent.getAction();
if (AppWidgetManager.ACTION_APPWIDGET_DELETED.equals(action)) {
final int appWidgetId = intent.getExtras().getInt(
AppWidgetManager.EXTRA_APPWIDGET_ID,
AppWidgetManager.INVALID_APPWIDGET_ID);
if (appWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID) {
this.onDeleted(context, new int[] { appWidgetId });
}
} else {
super.onReceive(context, intent);
}
}
@Override
public void onDeleted(Context context, int[] appWidgetIds) {
Toast.makeText(context, "onDelete", Toast.LENGTH_SHORT).show();
super.onDeleted(context, appWidgetIds);
}
}
Toast 显示“onUpdate”,然后我在“onDeleted”将其删除。文本视图在 onUpdate 中也发生了变化,但是当我按下按钮时没有任何反应。
我的清单如下所示:
<receiver android:name=".HelloWidget" android:label="@string/app_name">
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
</intent-filter>
<meta-data android:name="android.appwidget.provider"
android:resource="@xml/hello_widget_provider" />
</receiver>
<receiver android:name=".TestReceiver" android:label="@string/app_name">
<intent-filter>
<action android:name="MyTestIntent">
</action>
</intent-filter>
</receiver>
我做错了什么?
谢谢
【问题讨论】:
标签: android android-widget android-intent