关于 android 一键退出的实现

1.编写一个class继承Application
public class AppClose extends Application {

    private List<Activity> mainActivity = new ArrayList<Activity>();
    public List<Activity> MainActivity() {
            return mainActivity;
    }
    public void addActivity(Activity act) {
            mainActivity.add(act);
    }
    public void finishAll() {
            for (Activity act : mainActivity) {
                    if (!act.isFinishing()) {
                            act.finish();
                    }
            }
            mainActivity = null;
    }
}


2.在Activity 中的oncreate方法中添加
    AppClose appState = (AppClose)this.getApplication();
        appState.addActivity(this);
       // setContentView(R.layout.main);

3.//设定点击事件
button.setonclick....(){

AppClose appState = (AppClose)getApplicationContext();
                 appState.finishAll();
}

4.在注册清单文件中
给application添加属性  android:name=".AppClose"