BaseActivity

public class BaseAcitivty extends Activity {        @Override    protected void onCreate(Bundle savedInstanceState){        super.onCreate(savedInstanceState);        //无标题        requestWindowFeature(Window.FEATURE_NO_TITLE);         //全屏        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,                WindowManager.LayoutParams.FLAG_FULLSCREEN);                               //添加Activity到堆栈        BaseApplication.getInstance().addActivity(this);    }     @Override    protected void onDestroy(){        super.onDestroy();        //结束Activity&从栈中移除该Activity        BaseApplication.getInstance().finishActivity(this);    }            //    HOME    @Override       public void onAttachedToWindow() {           this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);            super.onAttachedToWindow();       }          // 下拉    @Override    public void onWindowFocusChanged(boolean hasFocus) {          super.onWindowFocusChanged(hasFocus);          try {              Object service = getSystemService("statusbar");              Class
       statusbarManager = Class.forName("android.app.StatusBarManager");              Method test = statusbarManager.getMethod("collapse");              test.invoke(service);          } catch (Exception ex) {              ex.printStackTrace();          }      }     }

BaseApplication

public class BaseApplication extends Application {        private static Stack
      
        activityStack;    private static BaseApplication singleton;    @Override    public void onCreate()    {        super.onCreate();        singleton=this;    }    public static BaseApplication getInstance() {        return singleton;    }    /**     * add Activity 添加Activity到栈     */    public void addActivity(Activity activity){        if(activityStack ==null){            activityStack =new Stack
       
        ();        }        activityStack.add(activity);    }    /**     * get current Activity 获取当前Activity（栈中最后一个压入的）     */    public Activity currentActivity() {        Activity activity = activityStack.lastElement();        return activity;    }    /**     * 结束当前Activity（栈中最后一个压入的）     */    public void finishActivity() {        Activity activity = activityStack.lastElement();        finishActivity(activity);    }    /**     * 结束指定的Activity     */    public void finishActivity(Activity activity) {        if (activity != null) {            activityStack.remove(activity);            activity.finish();            activity = null;        }    }    /**     * 结束指定类名的Activity     */    public void finishActivity(Class
         cls) {        for (Activity activity : activityStack) {            if (activity.getClass().equals(cls)) {                finishActivity(activity);            }        }    }    /**     * 结束所有Activity     */    public void finishAllActivity() {        for (int i = 0, size = activityStack.size(); i < size; i++) {            if (null != activityStack.get(i)) {                activityStack.get(i).finish();            }        }        activityStack.clear();    }    /**     * 退出应用程序     */    public void AppExit() {        try {            finishAllActivity();        } catch (Exception e) {        }    }}
       
      

AndroidMainifest.xml

      
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MainAcitvity

public void exitApp{      BaseApplication.getInstance().AppExit();}