[移动开发]Android ActivityLifecycle生命周期管理

Android ActivityLifecycle生命周期管理

全局的所有Activity生命周期监听管理类

public class RegisterActivityListener implements Application.ActivityLifecycleCallbacks {
    private final ActivityManager activityManager;

    public RegisterActivityListener() {
        activityManager = ActivityManager.getInstance();
    }

    @Override
    public void onActivityCreated(Activity activity, Bundle savedInstanceState) {
        activityManager.addActivity(activity);
    }

    @Override
    public void onActivityStarted(Activity activity) {

    }

    @Override
    public void onActivityResumed(Activity activity) {

    }

    @Override
    public void onActivityPaused(Activity activity) {

    }

    @Override
    public void onActivityStopped(Activity activity) {

    }

    @Override
    public void onActivitySaveInstanceState(Activity activity, Bundle outState) {

    }

    @Override
    public void onActivityDestroyed(Activity activity) {
        activityManager.removeActivity(activity);
    }
}

Activity栈管理工具类

public class ActivityManager {
    public static final String TAG = "ActivityManager";
    private Stack<WeakReference<Activity>> mActivityStack;
    private static volatile ActivityManager mInstance = new ActivityManager();

    private ActivityManager() {

    }

    public static ActivityManager getInstance() {
        if (mInstance == null) {
            synchronized (ActivityManager.class) {
                if (mInstance == null) {
                    mInstance = new ActivityManager();
                }
            }
        }
        return mInstance;
    }

    /**
     * 入栈
     * @param activity activity实例
     */
    public void addActivity(Activity activity) {
        if (mActivityStack == null) {
            mActivityStack = new Stack<>();
        }
        mActivityStack.add(new WeakReference<>(activity));
        TLog.i(TAG, "add new activity to stack");
    }

    /**
     * 出栈
     * @param activity
     */
    public void removeActivity(Activity activity) {
        if (mActivityStack != null) {
            mActivityStack.remove(new WeakReference<>(activity));
            TLog.i(TAG, "remove activity by stack");
        }
    }

    /**
     * 获取当前Activity
     * @return 当前（栈顶）activity
     */
    public Activity currentActivity() {
        if (mActivityStack != null && !mActivityStack.isEmpty()) {
            return mActivityStack.lastElement().get();
        }
        return null;
    }
}

自定义MainApplication注册监听

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
            registerActivityLifecycleCallbacks(new RegisterActivityListener());
        }

注：以上代码皆来源于与网络，若有侵权请联系删除。