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<SoftReference<BaseActivity>> list;    private ActControl() {        this.list = new ArrayList<>();    }    private void resume(BaseActivity activity) {        int size = list.size();        for (int i = 0; i < size; i++) {            SoftReference<BaseActivity> 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<BaseActivity> 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<BaseActivity> softReference = list.get(index);            if (softReference.get() != null) {                return softReference.get();            } else {                index--;            }        }        MyLog.e(TAG, "error,top is null");        return null;    }    private List<SoftReference<BaseActivity>> 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<BaseActivity> ref : list) {            final BaseActivity activity = ref.get();            if (activity != null && activity.getClass() == cls)                return activity;        }        return null;    }}