监听android home键的实现方式

1.首先是创建一个广播接受者

private BroadcastReceiver mHomeKeyEventReceiver = new BroadcastReceiver() {
		String SYSTEM_REASON = "reason";
		String SYSTEM_HOME_KEY = "homekey";
		String SYSTEM_HOME_KEY_LONG = "recentapps";
		 
		@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 (TextUtils.equals(reason, SYSTEM_HOME_KEY)) {
					 //表示按了home键,程序到了后台
					Toast.makeText(getApplicationContext(), "home", Toast.LENGTH_LONG).show();
				}else if(TextUtils.equals(reason, SYSTEM_HOME_KEY_LONG)){
					//表示长按home键,显示最近使用的程序列表
				}
			} 
		}
	};

2.注册监听

可以在Activity里注册，也可以在Service,Application里面

//注册广播
registerReceiver(mHomeKeyEventReceiver, new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS));

完整的代码如下：

import android.app.Application;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.text.TextUtils;
import android.widget.Toast;

public class MainApplication extends Application {

    /**
     * 监听是否点击了home键将客户端推到后台
     */
    private BroadcastReceiver mHomeKeyEventReceiver = new BroadcastReceiver() {
        String SYSTEM_REASON = "reason";
        String SYSTEM_HOME_KEY = "homekey";
        String SYSTEM_HOME_KEY_LONG = "recentapps";

        @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 (TextUtils.equals(reason, SYSTEM_HOME_KEY)) {
                    //表示按了home键,程序到了后台
                    Toast.makeText(getApplicationContext(), "home", Toast.LENGTH_LONG).show();
                }else if(TextUtils.equals(reason, SYSTEM_HOME_KEY_LONG)){
                    //表示长按home键,显示最近使用的程序列表
                }
            }
        }
    };

    @Override
    public void onCreate() {
        super.onCreate();
        //注册广播
        registerReceiver(mHomeKeyEventReceiver, new IntentFilter(
                Intent.ACTION_CLOSE_SYSTEM_DIALOGS));
    }

    @Override
    public void onTerminate() {
        unregisterReceiver(mHomeKeyEventReceiver);
        super.onTerminate();
    }
}

参考链接：监听android home键的实现方式