Activity管理器 获取启动时间 监控生命周期 MD

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目录

目录
小知识点
应用进入前后台判断
获取自己App中的所有Activity
获取栈顶和栈底的Activity
Activity管理器
ActivityStackManager
registerActivityLifecycleCallbacks
ActivityInfo
一个通用的AppManager

小知识点

应用进入前后台判断

getApplication().registerActivityLifecycleCallbacks(new SampleActivityLifecycleCallbacks() {
    private int mFinalCount;

    @Override
    public void onActivityStarted(Activity activity) {
        super.onActivityStarted(activity);
        mFinalCount++;
        if (mFinalCount == 1){
            //如果mFinalCount ==1，说明是从后台到前台
        }
    }

    @Override
    public void onActivityStopped(Activity activity) {
        super.onActivityStopped(activity);
        mFinalCount--;
        if (mFinalCount == 0){
            //如果mFinalCount ==0，说明是前台到后台
        }
    }
}

获取自己App中的所有Activity

try {
    PackageInfo packageInfo = getPackageManager().getPackageInfo(getPackageName(), PackageManager.GET_ACTIVITIES);
    for (ActivityInfo activity : packageInfo.activities) {
        Log.i("bqt", activity.name); //com.bqt.test.MainActivity
    }
} catch (PackageManager.NameNotFoundException e) {
    e.printStackTrace();
}

获取栈顶和栈底的Activity

ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
List<ActivityManager.RunningTaskInfo> list = manager.getRunningTasks(Integer.MAX_VALUE);
for (ActivityManager.RunningTaskInfo info : list) {
    Log.i("bqt", info.topActivity.getClassName() + "---" + info.baseActivity.getClassName());
}

Activity管理器

ActivityStackManager

定义一个集合（Stack）保存所有还未销毁的 Activity

public class ActivityStackManager {
    private Stack<ActivityInfo> activityStack;

    private static ActivityStackManager instance = new ActivityStackManager();

    private ActivityStackManager() {//构造方法私有
    }

    public static ActivityStackManager getInstance() {
        return instance;
    }

    //入栈
    public void push(Activity activity) {
        if (activityStack == null) activityStack = new Stack<>();

        for (int i = 0; i < activityStack.size(); i++) {
            if (activity == activityStack.get(i).activity) return;
        }
        activityStack.add(ActivityInfo.newBuilder()
                .activity(activity)
                .startTime(System.currentTimeMillis())
                .build());
    }

    //出栈
    public void pop(Activity activity) {
        if (activityStack != null && activityStack.size() > 0 && activity != null) {
            activity.finish();
            activityStack.remove(new ActivityInfo(activity));
        }
    }

    //第一种方式
    public ActivityInfo getActivityInfo(Activity activity) {
        ActivityInfo activityInfo = null;
        if (activityStack != null && activityStack.size() > 0) {
            for (ActivityInfo info : activityStack) {
                if (info.activity == activity) {
                    activityInfo = info;
                    break;
                }
            }
        }
        return activityInfo;
    }

    //第二种方式，不建议采用这种方式，因为在使用中发现可能会报数组越界异常
    //原因可能是当我通过search查找到之后和通过get获取之前这段时间，某个Activity被移除掉了，所以导致数组大小改变，取值时就可能越界了
    public ActivityInfo getActivityInfo2(Activity activity) {
        ActivityInfo activityInfo = null;
        if (activityStack != null && activityStack.size() > 0) {
            int index = activityStack.search(new ActivityInfo(activity));
            if (index >= 0) {
                activityInfo = activityStack.get(index);
            }
        }
        return activityInfo;
    }

    public long getStartTime(Activity activity) {
        ActivityInfo activityInfo = getActivityInfo(activity);
        return activityInfo != null ? activityInfo.startTime : 0;
    }
}

registerActivityLifecycleCallbacks

注册 Activity 生命周期回调

registerActivityLifecycleCallbacks(new ActivityLifecycleCallbacks() {
   @Override
   public void onActivityCreated(Activity activity, Bundle savedInstanceState) {
      ActivityStackManager.getInstance().push(activity);
   }

   @Override
   public void onActivityDestroyed(Activity activity) {
      long time = ActivityStackManager.getInstance().getStartTime(activity);
      String date = new SimpleDateFormat("yyyy.MM.dd HH:mm:ss SSS", Locale.getDefault()).format(new Date(time));
      Log.i("bqt", "【" + activity.getClass().getSimpleName() + "启动时间】" + date);
      ActivityStackManager.getInstance().pop(activity);//必须放在获取消息后面，否则一经清空了就获取不到了
   }

   @Override
   public void onActivityStarted(Activity activity) {
   }

   @Override
   public void onActivityResumed(Activity activity) {
       Log.i("bqt", "当前Activity" + "(" + activity.getClass().getSimpleName()+".java" + ":" +30 + ")");
   }

   @Override
   public void onActivityPaused(Activity activity) {
   }

   @Override
   public void onActivityStopped(Activity activity) {
   }

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

ActivityInfo

保存与Activity相关的一些信息

//用于保存Activity示例以及与Activity相关的一些信息，比如Activity启动时间等
public class ActivityInfo {
    public Activity activity;
    public long startTime;

    public ActivityInfo(Activity activity) {
        this.activity = activity;
    }

    @Override
    public boolean equals(Object obj) {//必须重写equals方法
        return obj instanceof ActivityInfo && ((ActivityInfo) obj).activity.equals(activity);
    }

    //省略Builder代码
}

一个通用的AppManager

/**
 * activity堆栈式管理
 */
public class AppManager {
    private static Stack<Activity> activityStack;
    private static AppManager instance;

    private AppManager() {
    }

    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<>();
        }
        activityStack.add(activity);
    }

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

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

    /**
     * 结束指定的Activity
     */
    public void finishActivity(Activity activity) {
        if (activity != null && !activity.isFinishing()) {
            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);
                break;
            }
        }
    }

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

    /**
     * 获取指定的Activity
     */
    public static Activity getActivity(Class<?> cls) {
        if (activityStack != null)
            for (Activity activity : activityStack) {
                if (activity.getClass().equals(cls)) {
                    return activity;
                }
            }
        return null;
    }

    public static Stack<Activity> getActivitys() {
        return activityStack;
    }

    /**
     * 退出应用程序
     */
    public void AppExit(Context context) {
        try {
            finishAllActivity();
            android.os.Process.killProcess(android.os.Process.myPid());// 杀死该应用进程
            System.exit(0);
        } catch (Exception ignored) {
        }
    }

    /**
     * 返回当前Activity栈中Activity的数量
     */
    public int getActivityCount() {
        int count = activityStack.size();
        return count;
    }

    /**
     * 堆栈中移除Activity
     */
    public void removeActivity(Activity activity) {
        if (activityStack == null) {
            return;
        } else if (activityStack.contains(activity)) {
            activityStack.remove(activity);
        }
        if (activity != null && !activity.isFinishing()) {
            activity.finish();
            activity = null;
        }
    }
}

2018-5-30