在安卓中双击java耳机按钮

Question

我使用此代码检测广播接收器中耳机按钮的单点和双击：

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();

}

但它只检测到一次点击。两次单击，而不是双击。问题出在哪里

Answer 1

正确的解决方案：

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