Question

我在这里看到了很多答案，但没有一个有效......我只想在我点击旁边的按钮后立即更新textview。我试图打印一个toast消息，它正常显示，但更新视图是问题。

我的代码

public class FollowersWidget extends AppWidgetProvider {

  public static String REFRESH_ACTION = "android.appwidget.action.APPWIDGET_UPDATE";

  int x = 0;

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

    if (intent.getAction().equals(REFRESH_ACTION)) {
      AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
      final RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.followers_widget);

      x++;
      views.setTextViewText(R.id.textv_count, x + "");

      int[] appWidgetId = AppWidgetManager.getInstance(context).getAppWidgetIds(new ComponentName(context, FollowersWidget.class));
      appWidgetManager.updateAppWidget(appWidgetId, views); 
    }

  }

  static void updateAppWidget(Context context, AppWidgetManager appWidgetManager,
      int appWidgetId) {

    RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.followers_widget);

    try {

      String count = MyConfigureActivity.getNumCount(context, appWidgetId);
      views.setTextViewText(R.id.textv_count, count );

      views.setOnClickPendingIntent(R.id.refreshButton,getRefreshPendingIntent(context, appWidgetId));

    } catch (Exception e) {
      e.printStackTrace();
    }

    appWidgetManager.updateAppWidget(appWidgetId, views);
  }

  public static PendingIntent getRefreshPendingIntent(Context context, int appWidgetId) {
    Intent intent = new Intent(REFRESH_ACTION);
    intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
    return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
  }

// other widget methods..
..
.
}

我的清单

  <receiver android:name=".FollowersWidget">
      <intent-filter>
        <action android:name="android.appwidget.action.APPWIDGET_UPDATE"/>
      </intent-filter>

      <meta-data
        android:name="android.appwidget.provider"
        android:resource="@xml/followers_info"/>
    </receiver>

Answer 1

请查看以下代码：

public class WidgetExample extends AppWidgetProvider {

public static final String REFRESH_ACTION = "YOUR_REFRESH_ACTION";
public static final String VALUE_KEY = "VALUE_KEY";
public static final String PREFERENCE_FILE_KEY = "PREFERENCE_FILE_KEY";

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

    if (intent != null) {
        if (intent.getAction() != null) {
            if (intent.getAction().equals(REFRESH_ACTION)) {
                int value = readValue(context) + 1;
                saveValue(context , value);
                AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
                int[] appWidgetIds = appWidgetManager.getAppWidgetIds(new ComponentName(context, WidgetExample.class));
                for (int id : appWidgetIds) {
                    final RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.followers_widget);
                    views.setTextViewText(R.id.textv_count, String.valueOf(value));
                    views.setOnClickPendingIntent(R.id.button_refresh, getRefreshPendingIntent(context));
                    appWidgetManager.updateAppWidget(id, views);
                }
            }
        }
    }
}


@Override
public void onEnabled(Context context) {
    int value = readValue(context);
    AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
    int[] appWidgetIds = appWidgetManager.getAppWidgetIds(new ComponentName(context, WidgetExample.class));
    for (int id : appWidgetIds) {

        final RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.followers_widget);
        views.setTextViewText(R.id.textv_count, String.valueOf(value));
        views.setOnClickPendingIntent(R.id.button_refresh, getRefreshPendingIntent(context));
        appWidgetManager.updateAppWidget(id, views);
    }
}

private void saveValue(Context context, int value) {
    SharedPreferences sharedPref = context.getSharedPreferences(PREFERENCE_FILE_KEY, Context.MODE_PRIVATE);
    SharedPreferences.Editor editor = sharedPref.edit();
    editor.putInt(VALUE_KEY, value);
    editor.apply();
}

private int readValue(Context context) {
    SharedPreferences sharedPref = context.getSharedPreferences(PREFERENCE_FILE_KEY, Context.MODE_PRIVATE);
    return sharedPref.getInt(VALUE_KEY, 0);
}

public static PendingIntent getRefreshPendingIntent(Context context) {
    Intent intent = new Intent(REFRESH_ACTION);
    return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
  }
}

Answer 2

我终于明白了，我已经看到很多方法来处理onClick on小部件，但这种方式对我来说很有效，并且它会在视觉上更新。

<强>代码

public class TestWidget extends AppWidgetProvider {

  public static String REFRESH_ACTION = "android.appwidget.action.APPWIDGET_UPDATE";
  static private RemoteViews views;
  private int x = 0;

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

    if (intent.getAction().equalsIgnoreCase(REFRESH_ACTION)) {
      views = new RemoteViews(context.getPackageName(), R.layout.test_widget);
      AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
      int[] appWidgetIds = appWidgetManager.getAppWidgetIds(new ComponentName(context, TestWidget.class));
      x++;
      views.setTextViewText(R.id.textv_count, x + "");
      appWidgetManager.updateAppWidget(appWidgetIds, views);
    }
  }

   static void updateAppWidget(Context context, AppWidgetManager appWidgetManager, int appWidgetId) {

    views = new RemoteViews(context.getPackageName(), R.layout.test_widget); 
    views.setTextViewText(R.id.textv_count, x + "");
    views.setOnClickPendingIntent(R.id.button, getPenIntent(context));
    appWidgetManager.updateAppWidget(appWidgetId, views);
  }



    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
     for (int appWidgetId : appWidgetIds) {
      appWidgetManager.updateAppWidget(appWidgetId, views);
    }
  }

    static private PendingIntent getPenIntent(Context context) {
    Intent intent = new Intent(context, TestWidget.class);
    intent.setAction(REFRESH_ACTION);
    return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
  }

}

如何在单击按钮时立即更新窗口小部件视图

2 个答案: