监听home键+模拟home键

一、监听home键首先定义一个广播接受者

HomeKeyReceiver

package com.kale.floattest;

import com.kale.floattest.service.DrawService;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

public class HomeKeyReceiver extends BroadcastReceiver{

    static final String SYSTEM_REASON = "reason";
    static final String SYSTEM_HOME_KEY = "homekey";// home key
    static final String SYSTEM_RECENT_APPS = "recentapps";// long home key

    @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_REASON);
            if (reason != null) {
                if (reason.equals(SYSTEM_HOME_KEY)) {
                    Log.e("homekey", "home键被点击");
                    context.stopService(new Intent(context,DrawService.class));
                } else if (reason.equals(SYSTEM_RECENT_APPS)) {
                     Log.e("homekey", "长按home键");
                }
            }
        }
    }
}

这里的事件我写了关闭一个服务，当然大家可以自由发挥。下面是在服务中注册

    // 监听HOME键
    HomeKeyReceiver receiver;

@Override
    public void onCreate() {
        super.onCreate();
        // 注册监听home键广播
        receiver = new HomeKeyReceiver();
        registerReceiver(receiver, new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS));
}
@Override
    public void onDestroy() {
        super.onDestroy();
        //取消监听home键
            unregisterReceiver(receiver);

    }            

二、模拟home键（执行代码后就等于点击了home键）

    protected void virtualHome() {
        //模拟HOME键
        Intent i= new Intent(Intent.ACTION_MAIN);
        i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); //如果是服务里调用，必须加入new task标识
        i.addCategory(Intent.CATEGORY_HOME);
        startActivity(i);
    }