Android监听Home键的完美解决方案

相信有不少朋友在开发过程中需要监听HOME键的需求，现本人将代码奉上，希望对大家有所帮助！

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;

public class HomeWatcher
{
private static final String TAG = "HomeWatcher";
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 HomeWatcher(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();
}

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

/**
* 停止监听，注销广播
*/
public void stopWatch()
{
if (mRecevier != null)
{
mContext.unregisterReceiver(mRecevier);
}
}

/**
* 广播接收者
*/
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.i(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();
}
}
}
}
}
}
}

调用时注意：
在初始化调用（如onCreate）时添加如下代码：
HomeWatcher mHomeWatcher = new HomeWatcher(this);
mHomeWatcher.setOnHomePressedListener(new OnHomePressedListener()
{
@Override
public void onHomePressed()
{
//按了HOME键
}

@Override
public void onHomeLongPressed()
{
//长按HOME键
}
});
mHomeWatcher.startWatch();

在程序销毁时（如：onDestroy）时添加如下代码：
if(mHomeWatcher != null)
mHomeWatcher.stopWatch();// 在销毁时停止监听，不然会报错的。

附件：http://down.51cto.com/data/2365114