使用ActivityLifecycleCallbacks记录

最新推荐文章于 2024-03-27 16:45:25 发布

原创最新推荐文章于 2024-03-27 16:45:25 发布 · 318 阅读

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CC 4.0 BY-SA版权

本文介绍了一种实现app从前台切换到后台，再回到前台时，若超过5分钟则自动刷新数据的方法。通过注册ActivityLifecycleCallbacks监听器，记录app活动状态变化，当满足条件时触发数据更新。

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了解更多的ActivityLifecycleCallbacks相关:https://www.jianshu.com/p/77f754446009

需求:app前台到后台超过5分钟再回来,需要刷新数据.

public class MyApplication extends Application {

@Override
public void onCreate() {
super.onCreate();

//进程前台后台判断(前台到后台再到前台5分钟以上时间刷新数据)
initForeground();
}

private void initForeground() {
registerActivityLifecycleCallbacks(new ActivityLifecycleCallbacks() {

int activityCount;
long stopTime;

@Override
public void onActivityCreated(Activity activity, Bundle savedInstanceState) {

}

@Override
public void onActivityStarted(Activity activity) {
if (activityCount == 0 && stopTime > 0){
long currentTimeMillis = System.currentTimeMillis();
long time = currentTimeMillis - stopTime;
//大于5分钟刷新数据
if (time > 5 * 60 * 1000){
//执行刷新数据的逻辑
}
}
activityCount++;
}

@Override
public void onActivityResumed(Activity activity) {

}

@Override
public void onActivityPaused(Activity activity) {

}

@Override
public void onActivityStopped(Activity activity) {
activityCount--;
if (activityCount == 0){
stopTime = System.currentTimeMillis();
}
}

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

}

@Override
public void onActivityDestroyed(Activity activity) {

}
});
}