Android监听Home、电源键

Android监听Home、电源键

一、Home键监听

先禁止Home键，再在onKeyDown里处理按键值，点击Home键的时候就把程序关闭(此方法在4.0及以上版本中不可用)

<uses-permission android:name="android.permission.DISABLE_KEYGUARD"></uses-permission

@Override

publicbooleanonKeyDown(intkeyCode, KeyEvent event)

{//TODO Auto-generated method stub

if(KeyEvent.KEYCODE_HOME==keyCode)

android.os.Process.killProcess(android.os.Process.myPid());

returnsuper.onKeyDown(keyCode, event);

}

@Override

publicvoidonAttachedToWindow()

{//TODO Auto-generated method stub

this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);

super.onAttachedToWindow();

}

二、电源键监听

首先，我们是要获取系统权限

<uses-permission android:name="android.permission.WAKE_LOCK" />

通过监听系统的两个action:

Intent.ACTION_SCREEN_OFF

Intent.ACTION_SCREEN_ON

private final BroadcastReceiver mBatInfoReceiver = new BroadcastReceiver() {

@Override

public void onReceive(final Context context, final Intent intent) {

final String action = intent.getAction();

if (Intent.ACTION_SCREEN_OFF.equals(action)) {

//退出程序...

}

};

onCreate()方法中注册

IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_OFF);

registerReceiver(mBatInfoReceiver, filter);

onDestory()方法中解除注册

if(mBatInfoReceiver != null){

try {

unregisterReceiver(mBatInfoReceiver);

} catch (Exception e) {

Log.e(TAG, "unregisterReceiver mBatInfoReceiver failure :"+e.getCause());

}

以上简单介绍使用方法，下面实现自定义Home\电源键监听(支持4.0及以上或以下)

/**
* Home键监听
* @author zhouchaoxin
*
*/
public class HomeKeyListener {

static final String TAG = "HomeKeyListener";
private Context mContext;
private IntentFilter mFilter;
private OnHomePressedListener mListener;
private InnerRecevier mRecevier;
/**
* Home键监听构造初始化
* @param context
*/
public HomeKeyListener(Context context) {
mContext = context;
mFilter = new IntentFilter();
mFilter.addAction(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
mFilter.addAction(Intent.ACTION_SCREEN_OFF);
mFilter.addAction(Intent.ACTION_SCREEN_ON);

}

/**
* 回调接口
* @author zhouchaoxin
*
*/
public interface OnHomePressedListener {

/**
* Home键短按
*/
public void onHomePressed();
/**
* Home键长按
*/
public void onHomeLongPressed();
/**
* 监听电源键/开
*/
public void onScreenPressed();
/**
* 监听电源键/关
*/
public void offScreenPressed();
}

/**
* 设置监听
* @param listener
*/
public void setOnHomePressedListener(OnHomePressedListener listener) {
mListener = listener;
mRecevier = new InnerRecevier();
}

/**
* 开始监听,注册广播
*/
public void startHomeListener() {
if (mRecevier != null) {
mContext.registerReceiver(mRecevier, mFilter);
}
}

/**
* 停止监听，注销广播
*/
public void stopHomeListener() {
if (mRecevier != null) {
mContext.unregisterReceiver(mRecevier);
}
}
/**
* 广播接收
* @author zhouchaoxin
*
*/
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();
}
}
}
}//监听电源键开
if (action.equals(Intent.ACTION_SCREEN_OFF)) {

mListener.offScreenPressed();

}else if (action.equals(Intent.ACTION_SCREEN_ON)) {

mListener.onScreenPressed();
}
}
}
}

在Activity中的使用

public class MainActivity extends Activity {
private static final String TAG = "MainActivity";
private HomeKeyListener homeKeyListener;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

homeKeyListener = new HomeKeyListener(this);
homeKeyStart(); //处理方法

homeKeyListener.startHomeListener(); //开启监听
}

/**
* Home键开始监听
*/
private void homeKeyStart(){

homeKeyListener.setOnHomePressedListener(new OnHomePressedListener() {

@Override
public void onHomePressed() {

// 这里获取到home键按下事件
Log.i("lock", "onHomePressed ========================================");

}

@Override
public void onHomeLongPressed() {

Log.i("lock", "onHomeLongPressed ========================================");

}

@Override
public void onScreenPressed() {
// TODO Auto-generated method stub

}

@Override
public void offScreenPressed() {
// TODO Auto-generated method stub
}
});
}
@Override
protected void onDestroy() {
super.onPause();
if(homeKeyListener != null){

homeKeyListener.stopHomeListener(); //关闭监听

}

}
}

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