[英]Cant change ImageView resource on RemoteView Android
我正在嘗試使用可點擊的圖片制作一個簡單的小部件,該圖片在點擊時會發生變化。 我不明白為什么它不起作用
public class AppWidget extends AppWidgetProvider {
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction()==null) {
context.startService(new Intent(context,
ToggleService.class));
} else {
super.onReceive(context, intent);
}
}
@Override
public void onUpdate(Context context, AppWidgetManager
appWidgetManager, int[] appWidgetIds) {
context.startService(new Intent(context,
ToggleService.class));
}
public static class ToggleService extends IntentService {
public ToggleService() {
super("AppWidget$ToggleService");
}
@Override
protected void onHandleIntent(Intent intent) {
ComponentName me=new ComponentName(this, AppWidget.class);
AppWidgetManager mgr=AppWidgetManager.getInstance(this);
mgr.updateAppWidget(me, buildUpdate(this));
}
private RemoteViews buildUpdate(Context context) {
RemoteViews updateViews=new
RemoteViews(context.getPackageName(),R.layout.widget);
int a = 1;
if(a ==
1) {
updateViews.setImageViewResource(R.id.phoneState,
R.drawable.dual_off);
} else {
updateViews.setImageViewResource(R.id.phoneState,
R.drawable.dual_on);
}
Intent i=new Intent(this, AppWidget.class);
PendingIntent pi = PendingIntent.getBroadcast(context, 0, i,0);
updateViews.setOnClickPendingIntent(R.id.phoneState,pi);
return updateViews;
}
}
}
我已經嘗試過for循環中的所有操作,但它不會改變圖像。 我已經從有關android開發的書中做到了這一點,這是java和android的新手。
更改remoteview的源代碼after
,您將通過AppWidgetManager更新小部件。 after
此代碼段中,我嘗試更改其小部件的布局,其名稱為AppWidgetProvider,名稱為DictionWidgetProvider :
private void hideWidgetInstances() {
hideViews = new RemoteViews(App.getContext().getPackageName(),
R.layout.hide);
AppWidgetManager mManager = AppWidgetManager.getInstance(App
.getContext());
ComponentName cn = new ComponentName(App.getContext(),
DictionWidgetProvider.class);
mManager.updateAppWidget(cn, hideViews);
}
App是擴展Application的類。您可以使用Application Context到達ComponentName 。
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