我有一个名为updateWidget的方法.当窗口小部件首次放置在主屏幕中时,窗口小部件配置活动会调用此方法.当用户将数据输入到该活动时,当它从我的一个活动接收数据时,onReceive方法也会调用此方法.

这是我的问题：小部件放在主屏幕中,所有数据都在正确的位置.但是当我的活动发送数据onReceive(使用意图和额外)时,数据不会通过.我只是在extras.getString上得到一个空字符串.

我之前使用过Intent来在活动之间发送数据,当我将数据发送到widget提供类时,是否需要做一些不同的事情？或者我只是愚蠢而且缺少明显的东西？

我附上了(我认为是)相关的代码.如果您需要任何澄清或更多代码,请与我们联系.

感谢您花时间阅读本文以及您可以提供的任何帮助,

干杯罗刹克

widget配置类中的onListItemClick.

@Override
    protected void onListItemClick(ListView l,View v,int position,long id) {
        super.onListItemClick(l,v,position,id);

        Cursor note = mDbHelper.fetchNote(id);
        startManagingCursor(note);
        String title = note.getString(note.getColumnIndexOrThrow(NotesDbAdapter.KEY_TITLE));
        String text = note.getString(note.getColumnIndexOrThrow(NotesDbAdapter.KEY_BODY));
        loadData(title);


        Intent resultValue = new Intent();
        resultValue.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,mAppWidgetId);            
        setResult(RESULT_OK,resultValue);   
        finish();
 }



 void loadData(String title) {

    AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(this); 

    SingleNote.updateWidget(this,appWidgetManager,mAppWidgetId,title);

}

将数据发送到onReceive的意图(这是我的一个活动类)

private void updateWidget() { 
    Intent i = new Intent(this,SingleNote.class); 
    i.setAction(SingleNote.UPDATE_ACTION); 
    Toast.makeText(getApplicationContext(),mTitleText.getText()+"from the activity",Toast.LENGTH_SHORT).show();//This works just fine
    i.putExtra("title",mTitleText.getText());
    sendBroadcast(i);

}

我的小部件提供课程

public class SingleNote extends AppWidgetProvider {

public static String UPDATE_ACTION = "ActionUpdateSinglenoteWidget";
private static NotesDbAdapter mDbHelper;



public void onUpdate(Context context,AppWidgetManager appWidgetManager,int[] appWidgetIds) {
    final int N = appWidgetIds.length;

    // Perform this loop procedure for each App Widget that belongs to this provider
    for (int i=0; i<N; i++) {
        int appWidgetId = appWidgetIds[i];



     // Tell the AppWidgetManager to perform an update on the current app widget
        RemoteViews views = new RemoteViews(context.getPackageName(),R.layout.singlenote_widget);
        appWidgetManager.updateAppWidget(appWidgetId,views);




    }
}

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

        String action = intent.getAction(); 
        Bundle extras = intent.getExtras(); 
        String title1 = extras.getString("title");//this value does not come through
        Toast.makeText(context,title1,Toast.LENGTH_LONG).show();//this gives an empty space

        if (action != null && action.equals(UPDATE_ACTION)) { 
                final AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context); 
                ComponentName name = new ComponentName(context,SingleNote.class);
                int[] appWidgetId = AppWidgetManager.getInstance(context).getAppWidgetIds(name);
                final int N = appWidgetId.length;
                if (N < 1)
                {
                    return ;
                }
                else {
                    int id = appWidgetId[N-1];
                    updateWidget(context,id,title1);
                }
        } 

        else { 
                super.onReceive(context,intent); 
        } 
} 



static void updateWidget(Context context,int appWidgetId,String title){

    RemoteViews views = new RemoteViews(context.getPackageName(),R.layout.singlenote_widget);
    views.setTextViewText(R.id.single_note_title,title);
    appWidgetManager.updateAppWidget(appWidgetId,views);



}