我使用此代码来检测广播接收器中耳机按钮的单击和双击：
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();
}
但它只检测到单击。两次单击而不是双击。问题出在哪里？
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();
}
本文内容由网友自发贡献，版权归原作者所有，本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容，请联系:hwhale#tublm.com(使用前将#替换为@)
