拦截返回键，HOME键，继承BaseActivity即可

import android.app.Activity;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.os.Bundle;import android.util.Log;import android.view.KeyEvent;import android.widget.Toast;/** * 所有Activity继承该类， * 该类监测到home键的点击时的事件进行自己的处理 * 拦截返回键 * @author RongGuang *  */public class BaseActivity extends Activity {    // 监听HOME键    HomeKeyEventBroadCastReceiver receiver;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        // 监听home键广播        receiver = new HomeKeyEventBroadCastReceiver();        registerReceiver(receiver, new IntentFilter(                Intent.ACTION_CLOSE_SYSTEM_DIALOGS));    }    //拦截其他键    @Override    public boolean onKeyDown(int keyCode,KeyEvent event){        switch(keyCode){            case KeyEvent.KEYCODE_HOME:return true;            case KeyEvent.KEYCODE_BACK:return true;            case KeyEvent.KEYCODE_CALL:return true;            case KeyEvent.KEYCODE_SYM: return true;            case KeyEvent.KEYCODE_VOLUME_DOWN: return true;            case KeyEvent.KEYCODE_VOLUME_UP: return true;            case KeyEvent.KEYCODE_STAR: return true;        }        return super.onKeyDown(keyCode, event);    }    @Override    protected void onDestroy() {        unregisterReceiver(receiver);        super.onDestroy();    }    class HomeKeyEventBroadCastReceiver 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)) {                        // home key处理点                        Log.e("homekey", "home键被点击");                        Toast.makeText(BaseActivity.this, "Home键被点击", Toast.LENGTH_SHORT).show();                    } else if (reason.equals(SYSTEM_RECENT_APPS)) {                        // long homekey处理点                         Log.e("homekey", "长按home键");                         Toast.makeText(BaseActivity.this, "Home键长按", Toast.LENGTH_SHORT).show();                    }                }            }        }    }}