随时随地退出程序

如何在一个app中随时退出所有活动，不用一直按back

新建一个BaseActivity类

1. 新建一个BaseActivity类, 继承自AppCompatActivity
2. 重写onCreat()
3. 所有的activity继承自自BaseActivity
   java
public class BaseActivity extends AppCompatActivity{
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d("BaseActivity", getClass().getSimpleName()); // 获取活动名称
}


新建ActivityCollector 类作为活动管理器

1. 通过一个List来暂存活动
2. 提供一个addActivity()方法向List添加一个活动
3. 提供一个removeActivity()方法来移除List中活动
4. 提供finishAll()方法来销毁所有List中活动

public class ActivityCollector {    public static List<Activity> activities = new ArrayList<>();    public static void addActivity(Activity activity){        activities.add(activity);    }    public static void removeActivity(Activity activity) {        activities.remove(activity);    }    public static void finishyAll(){        for(Activity activity:activities){  // 遍历            if(!activity.isFinishing()){                activity.finish();            }        }        activities.clear();    }}

修改BaseActivity

public class BaseActivity extends AppCompatActivity{    @Override    protected void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        Log.d("BaseActivity", getClass().getSimpleName());        ActivityCollector.addActivity(this);    }    @Override    protected void onDestroy() {        super.onDestroy();        ActivityCollector.removeActivity(this);    }}

活动中添加鼠标监听

protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        Log.d("ThirdAcitivity", "Task id is "+getTaskId());        setContentView(R.layout.thrid_activity);        Button button3 = (Button) findViewById(R.id.button_3);        button3.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                ActivityCollector.finishyAll();            }        });    }

这是我学习Android的笔记,参考书<<第一行代码-第二版>>,感谢郭霖大神
如有不足之处,可以一起讨论
附上郭霖的blog http://blog.csdn.net/guolin_blog