1. The return and menu keys can directly override the onKeyDown(int keyCode, KeyEvent event) method to monitor:
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) { // 监控/拦截/屏蔽返回键
//do something
} else if (keyCode == KeyEvent.KEYCODE_MENU) {
//do something
} else if (keyCode == KeyEvent.KEYCODE_HOME) {
//This operation does not return a result
}
return super.onKeyDown(keyCode, event);
}
In do something, if it returns false, the time will not continue to pass, that is, the corresponding subsequent events will not be triggered
2. If it is a Home event, according to the online statement, it is the bottom layer that intercepts this event, but a broadcast will be issued after the interception. So register a broadcast to receive the HOME button event.
/**
* Home键监听封装
*
*
*/
public class HomeListener {
static final String TAG = "HomeListener";
private Context mContext;
private IntentFilter mFilter;
private OnHomePressedListener mListener;
private InnerRecevier mRecevier;
// 回调接口
public interface OnHomePressedListener {
public void onHomePressed();
public void onHomeLongPressed();
}
public HomeListener(Context context) {
mContext = context;
mFilter = new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
}
/**
* 设置监听
*
* @param listener
*/
public void setOnHomePressedListener(OnHomePressedListener listener) {
mListener = listener;
mRecevier = new InnerRecevier();
}
/**
* Start listening, register broadcast
*/
public void startWatch() {
if (mRecevier != null) {
mContext.registerReceiver(mRecevier, mFilter);
}
}
/**
* Stop listening and cancel broadcasting
*/
public void stopWatch() {
if (mRecevier != null) {
mContext.unregisterReceiver(mRecevier);
}
}
/**
* broadcast receiver
*/
class InnerRecevier extends BroadcastReceiver {
final String SYSTEM_DIALOG_REASON_KEY = "reason";
final String SYSTEM_DIALOG_REASON_GLOBAL_ACTIONS = "globalactions";
final String SYSTEM_DIALOG_REASON_RECENT_APPS = "recentapps";
final String SYSTEM_DIALOG_REASON_HOME_KEY = "homekey";
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (action.equals(Intent.ACTION_CLOSE_SYSTEM_DIALOGS)) {
String reason = intent.getStringExtra(SYSTEM_DIALOG_REASON_KEY);
if (reason != null) {
// Log.e(TAG, "action:" + action + ",reason:" + reason);
if (mListener != null) {
if (reason.equals(SYSTEM_DIALOG_REASON_HOME_KEY)) {
// 短按home键
mListener.onHomePressed();
} else if (reason
.equals(SYSTEM_DIALOG_REASON_RECENT_APPS)) {
// 长按home键
mListener.onHomeLongPressed();
}
}
}
}
}
}
}
When using:
private HomeListener mHomeWatcher;
在oncreate()中：
mHomeWatcher = new HomeListener(this);
mHomeWatcher.setOnHomePressedListener(new OnHomePressedListener() {
@Override
public void onHomePressed() {
}
@Override
public void onHomeLongPressed() {
}
});
mHomeWatcher.startWatch();
在onpause（）方法中：
mHomeWatcher.stopWatch();