Android学习之销毁所有的Activity

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

@Override
protected void onDestroy() {
super.onDestroy();
ActivityCollector.removeActivity(this);
}
}

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 finishAll(){
for (Activity activity : activities){
if (!activity.isFinishing()){
activity.finish();
}
}
}
}

类BaseActivity作为父类工程里所有的Activity都要继承它，需要退出程序时直接调用finishAll()方法。