java - 如何在 Android 中从 Broadcast ONRECEIVE 更新 UI？

Question

我读了很多教程，但我不知道该怎么做:(

我有以下代码:

@Override
public void onUpdate(Context context, SlookCocktailManager cocktailBarManager, int[] cocktailIds) {        

    // create RemoteViews
    RemoteViews rv = new RemoteViews(context.getPackageName(), R.layout.feeds_panel_layout);

    rv.setRemoteAdapter(R.id.btn_camera, intent);
    rv.setEmptyView(R.id.widgetlist, R.id.emptylist);

    Intent itemClickIntent = new Intent(context, CocktailFeedsProvider.class);
    itemClickIntent.setAction(Constants.COCKTAIL_LIST_ADAPTER_CLICK_ACTION);

    rv.setOnClickPendingIntent(R.id.btn_internet, getPendingSelfIntent(context, MyOnClick1, cocktailBarManager));
    rv.setOnClickPendingIntent(R.id.btn_camera, getPendingSelfIntent(context, MyOnClick2, cocktailBarManager));
    rv.setOnClickPendingIntent(R.id.btn_phone, getPendingSelfIntent(context, MyOnClick3, cocktailBarManager));
            // update cocktail
    for (int i = 0; i < cocktailIds.length; i++) {
        cocktailBarManager.updateCocktail(cocktailIds[i], rv);
    }
}

protected PendingIntent getPendingSelfIntent(Context context, String action, SlookCocktailManager cocktailBarManager) {
    Intent intent = new Intent(context, getClass());
    intent.setAction(action);

    return PendingIntent.getBroadcast(context, 0, intent, 0);
}


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

    if (MyOnClick1.equals(intent.getAction())) {
        // your onClick action is here
        Toast.makeText(context, "Button1", Toast.LENGTH_SHORT).show();
        Log.d("vuta", "Clicked button1");
        SharedPreferences prefs = context.getSharedPreferences("myPrefs", Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = prefs.edit();

            if (prefs.getBoolean("istorch", false)) {
                context.stopService(new Intent(context, Flashlight.class));
                Log.d("vuta", "Flashlight is running= stop");
                editor.putBoolean("istorch", false).commit();
            } else {
                context.startService(new Intent(context, Flashlight.class));
                Log.d("vuta", "flashlight is no running = start");
                editor.putBoolean("istorch", true).commit();
            }

    } else if (MyOnClick2.equals(intent.getAction())) {
        Toast.makeText(context, "Button2", Toast.LENGTH_SHORT).show();
        Log.d("vuta", "Clicked button2");

        WifiManager wifi = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
        if(wifi.isWifiEnabled()) {

            //rv.setImageViewResource(R.id.btn_camera, R.drawable.wifi_inactive);
            wifi.setWifiEnabled(false);
            Log.d("vuta", "wifi is enabled");
        } else {
            Log.d("vuta", "wifi is disabled");
           // rv.setImageViewResource(R.id.btn_camera, R.drawable.wifi_active);
            wifi.setWifiEnabled(true);
        }

    } else if (MyOnClick3.equals(intent.getAction())) {
        Toast.makeText(context, "Button3", Toast.LENGTH_SHORT).show();
        Log.d("vuta", "Clicked button3");
    }

在 onReceive 上，我可以跟踪每个项目的每次点击。但是，我想在单击时更改按钮图像(启用/禁用)

我知道我可以通过 onUpdate 方法更新我的 View ，但在 onReceive 上我不能。

我不明白如何实现 onUpdate 的 Intent 来实现这一点。

我需要帮助:(我认为逻辑不好:(

Answer 1

告诉我这两个方法是用什么类类型编写的？

同时，您可以尝试一下

尝试获取按钮所在 Activity 的实例。假设它是mActivty。现在在 onUpdate() 方法中使用这个变量

mActivity.runOnUiThread(new Runnable() {
        @Override
        public void run() {
            // update you button here
        }
    });