Android监听Home键

package com.lenovo.styluspen.utils;

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

public class HomeWatcherUtils{

    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) {
                    LogUtils.i("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。