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
public boolean onKeyDown(int keyCode, KeyEvent event)
{ // TODO Auto-generated method stub
if(KeyEvent.KEYCODE_HOME==keyCode)
android.os.Process.killProcess(android.os.Process.myPid());
return super.onKeyDown(keyCode, event);
}
@Override
public void onAttachedToWindow()
{ // 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
}
}
}