耳机按钮双击在安卓 [英] Headset button double click in android

问题描述

我用这个code在我的广播接收器检测单，双点击耳机按钮：

I used this code for detecting single and double click for headset button in my broadcast receiver:

int d = 0;
@Override
public void onReceive(Context context, Intent intent) {
    String intentAction = intent.getAction();
    if (!Intent.ACTION_MEDIA_BUTTON.equals(intentAction)) {
        return;
    }
    KeyEvent event = (KeyEvent) intent
            .getParcelableExtra(Intent.EXTRA_KEY_EVENT);
    if (event == null) {
        return;
    }
    int action = event.getAction();
    switch (event.getKeyCode()) {
        case KeyEvent.KEYCODE_HEADSETHOOK:
            if (action == KeyEvent.ACTION_DOWN) {
                d++;
                Handler handler = new Handler();
                Runnable r = new Runnable() {                   
                    @Override
                    public void run() {
                        Toast.makeText(context, "single click!", Toast.LENGTH_SHORT).show();
                        d = 0;
                    }
                };
                if (d == 1) {
                    handler.postDelayed(r, 500);
                } else if (d == 2) {
                    d = 0;
                    Toast.makeText(context, "double click!", Toast.LENGTH_SHORT).show();
                }
            }break;
    }
    abortBroadcast();

}

但它只是检测到单一的点击。两个单一的点击，而不是双击。哪里的问题？

but it just detects single click. Two single click instead of double click. Where's the problem?

推荐答案

正确的解决方法：

static int d = 0;
@Override
public void onReceive(Context context, Intent intent) {
    String intentAction = intent.getAction();
    if (!Intent.ACTION_MEDIA_BUTTON.equals(intentAction)) {
    return;
    }
    KeyEvent event = (KeyEvent) intent
        .getParcelableExtra(Intent.EXTRA_KEY_EVENT);
    if (event == null) {
    return;
    }
    int action = event.getAction();
    switch (event.getKeyCode()) {
    case KeyEvent.KEYCODE_HEADSETHOOK:
        if (action == KeyEvent.ACTION_DOWN) {
            d++;
            Handler handler = new Handler();
            Runnable r = new Runnable() {

            @Override
            public void run() {
                    // single click *******************************
                    if (n_click == 1) {
                                Toast.makeText(context, "single click!", Toast.LENGTH_SHORT).show();
                    }
                    // double click *********************************
                    if (n_click == 2) {
                        Toast.makeText(context, "Double click!!", Toast.LENGTH_SHORT).show();
                    }
                    d = 0;
            }
            };
            if (d == 1) {
                    handler.postDelayed(r, 500);
            }
        }break;
   }
   abortBroadcast();
}

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