Android项目实战（三十七）：Activity管理及BaseActivity的实现

public class AppManager {
    private static Stack<Activity> activityStack;   // Activity栈  ， 先进后出
    private static AppManager instance;

    /**
     * 单例模式实例
     */
    public static AppManager getAppManager() {
        if (instance == null) {
            instance = new AppManager();
        }
        return instance;
    }
}

    /**
     * 添加Activity到堆栈
     */
    public void addActivity(Activity activity) {
        if (activityStack == null) {
            activityStack = new Stack<Activity>();
        }
        activityStack.add(activity);
    }

    /**
     * 结束当前Activity（堆栈中最后一个压入的）
     */
    public void finishActivity() {
        Activity activity = activityStack.lastElement();
        if (activity != null) {
            activity.finish();
            activity = null;
        }
    }

    /**
     * 获取当前Activity（堆栈中最后一个压入的）
     */
    public Activity currentActivity() {
        Activity activity = activityStack.lastElement();
        return activity;
    }

    /**
     * 结束指定的Activity
     */
    public void finishActivity(Activity activity) {
        if (activity != null) {
            activityStack.remove(activity);
            activity.finish();
            activity = null;
        }
    }

    /**
     * 结束指定类名的Activity
     */
    public void finishActivity(Class<?> cls) {
        for (Activity activity : activityStack) {
            if (activity.getClass().equals(cls)) {
                finishActivity(activity);
            }
        }
    }

   /**
     * 结束所有Activity
     */
    public void finishAllActivity() {
        for (int i = 0, size = activityStack.size(); i < size; i++) {
            if (null != activityStack.get(i)) {
                activityStack.get(i).finish();
            }
        }
        activityStack.clear();
    }

    /**
     * 退出应用程序
     */
    public void AppExit(Context context) {
        try {
            finishAllActivity();
            ActivityManager activityMgr = (ActivityManager) context
                    .getSystemService(Context.ACTIVITY_SERVICE);
            activityMgr.restartPackage(context.getPackageName());
            System.exit(0);
        } catch (Exception e) {
        }
    }

/**
* @author xqx
* @email djlxqx@163.com
* blog:http://www.cnblogs.com/xqxacm/
* createAt 2017/06/13
* description: 基础类， 对Activity 的管理
*/

public class BaseActivity extends Activity{
    /**
     * activity堆栈管理
     */
    protected AppManager appManager = AppManager.getAppManager();

    private String contextString ; // 类名

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // 添加activity 到栈
        appManager.addActivity(this);

    }

    protected void onPause() {
        super.onPause();
        // 可以在此添加一些友盟的统计代码等
    }

    protected void onResume() {
        super.onResume();
        // 可以在此添加一些友盟的统计代码等
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        // 从栈中移除activity
        appManager.finishActivity(this);
    }

}

public class BaseFragmentActivity extends FragmentActivity {
    /**
     * activity堆栈管理
     */
    protected AppManager appManager = AppManager.getAppManager();

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // 添加activity 到栈
        appManager.addActivity(this);

    }

    protected void onPause() {
        super.onPause();
        // 可以在此添加一些友盟的统计代码等
    }

    protected void onResume() {
        super.onResume();
       // 可以在此添加一些友盟的统计代码等
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        // 从栈中移除activity
        appManager.finishActivity(this);
    }
}