Android 完全退出 App，Activity管理者 （Exit）

Android 完全退出 App，Activity管理者 （Exit）

转载请标明出处：
http://blog.csdn.net/changs_roid/article/details/52848552

今天还看到有人对app退出感到苦恼，因此分享下自己的经验。我在项目中会建立一个activity的管理者ActControl,管理所有activity栈中的act。

结束时你可以遍历这个act集合。全部finish掉就行了。

用法：
在BaseActivity中

public abstract class BaseActivity extends AppCompatActivity {
    @Override
    protected void onResume() {
        super.onResume();
        ActControl.onResume(this);
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        ActControl.onDestroy(this);
    }
    //other...
 }

     /**
     * 获取最顶层的act实例
     * @return act实例
     */
    public static BaseActivity getTop();
    /**
     * 查找某个act是否任务栈
     * @param cls 要查找的act的class
     * @return 满足的act实例
     */
    public BaseActivity findExistInner(Class cls);

public class ActControl {
    private static final String TAG = "ActControl";

    private List> list;

    private ActControl() {
        this.list = new ArrayList<>();
    }

    private void resume(BaseActivity activity) {
        int size = list.size();
        for (int i = 0; i < size; i++) {
            SoftReference softReference = list.get(i);
            BaseActivity act = softReference.get();
            if (act == null) {
                list.remove(softReference);
                i--;
                size--;
            } else if (act == activity) {
                if (i != size - 1) {
                    Collections.swap(list, i, size - 1);
                }
                return;
            }
        }
        list.add(new SoftReference<>(activity));
    }


    private void destroy(BaseActivity activity) {
        int size = list.size();
        for (int i = 0; i < size; i++) {
            SoftReference softReference = list.get(i);
            BaseActivity act = softReference.get();
            if (act != null && act == activity) {
                list.remove(softReference);
                return;
            }
        }
    }

    private BaseActivity top() {
        int index = list.size() - 1;
        while (index >= 0) {
            SoftReference softReference = list.get(index);
            if (softReference.get() != null) {
                return softReference.get();
            } else {
                index--;
            }
        }
        MyLog.e(TAG, "error,top is null");
        return null;
    }

    private List> getList() {
        return list;
    }

    private static ActControl CONTROL = new ActControl();

    public static void onResume(BaseActivity activity) {
        CONTROL.resume(activity);
        MyLog.d(TAG, "onResume size = " + CONTROL.getList().size());
    }

    public static void onDestroy(BaseActivity activity) {
        CONTROL.destroy(activity);
        MyLog.d(TAG, "onDestroy size = " + CONTROL.getList().size());
    }

    public static BaseActivity findExist(Class cls) {
        return CONTROL.findExistInner(cls);
    }

    public static BaseActivity getTop() {
        return CONTROL.top();
    }

    public BaseActivity findExistInner(Class cls) {
        for (SoftReference ref : list) {
            final BaseActivity activity = ref.get();
            if (activity != null && activity.getClass() == cls)
                return activity;
        }
        return null;
    }
}