原文应用于:http://blog.csdn.net/u012146107/article/details/11833099
http://blog.csdn.net/gouguofei/article/details/7775752
一般思维,把所有的activity继承一个通用的baseActivity,然后再onStop()方法中判断程序是否进入后台
/**
* 文件名:BaseActivity.java
* 版本号:
* 日期:2012-6-20
* 创建人:
* Copyright wadata 版权所有
* 变更:
*/
package com.wadata.mobilefollowup.view.base;
import java.util.List;
import android.app.Activity;
import android.app.ActivityManager;
import android.app.ActivityManager.RunningAppProcessInfo;
import android.content.Context;
/**
* 名称:BaseActivity
* 描述:
* 创建人:
* 日期:2012-6-20 下午5:53:35
* 变更:
*/
public class BaseActivity extends Activity {
@Override
protected void onStop() {
// TODO Auto-generated method stub
super.onStop();
if (!isAppOnForeground()) {
//app 进入后台
//全局变量isActive = false 记录当前已经进入后台
}
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
//if (!isActive) {
//app 从后台唤醒,进入前台
//isActive = true;
//}
}
/**
* 程序是否在前台运行
*
* @return
*/
public boolean isAppOnForeground() {
// Returns a list of application processes that are running on the
// device
ActivityManager activityManager = (ActivityManager) getApplicationContext().getSystemService(Context.ACTIVITY_SERVICE);
String packageName = getApplicationContext().getPackageName();
List
appProcesses = activityManager
.getRunningAppProcesses();
if (appProcesses == null)
return false;
for (RunningAppProcessInfo appProcess : appProcesses) {
// The name of the process that this object is associated with.
if (appProcess.processName.equals(packageName)
&& appProcess.importance == RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
return true;
}
}
return false;
}
}
Android 4.0(API Level 14)新增了一个接口ActivityLifecycleCallbacks,用于监听应用中所有Activity的运行情况,解放了开发者统计分析Activity的困难。
官方文档:http://developer.android.com/reference/android/app/Application.ActivityLifecycleCallbacks.html
使用方法:
在Application 中使用registerActivityLifecycleCallbacks(callback);
注册你的CallBack;
this.registerActivityLifecycleCallbacks(new ActivityLifecycleCallbacks() {
public void onActivityStopped(Activity activity) {
}
public void onActivityStarted(Activity activity) {
}
public void onActivitySaveInstanceState(Activity activity, Bundle outState) {
}
public void onActivityResumed(Activity activity) {
}
public void onActivityPaused(Activity activity) {
}
public void onActivityDestroyed(Activity activity) {
}
public void onActivityCreated(Activity activity, Bundle savedInstanceState) {
}
});
使用unregisterActivityLifecycleCallbacks 取消注册。
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