【移动应用开发技术】Android中怎么判断一个应用是否在运行

【移动应用开发技术】Android中怎么判断一个应用是否在运行

Android中怎么判断一个应用是否在运行，针对这个问题，这篇文章详细介绍了相对应的分析和解答，希望可以帮助更多想解决这个问题的小伙伴找到更简单易行的方法。在一个应用中，或一个Service、Receiver中有时候需要判断一个应用是否正在运行，以便进行一些相关的处理，这个时候我们需要得到一个ActivityManager，这个Manager顾名思意就是管理Activity的，它有一个方法叫getRunningTasks，可以得到当前系统正在运行的Task的列表，代码如下：ActivityManager

am

=

(ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE);

List<RunningTaskInfo>

list

=

am.getRunningTasks(100);

for

(RunningTaskInfo

info

:

list)

{

if

(info.topActivity.getPackageName().equals(MY_PKG_NAME)

&&

info.baseActivity.getPackageName().equals(MY_PKG_NAME))

{

isAppRunning

=

true;

//find

it,

break

break;

}

}100表示取的最大的任务数，info.topActivity表示当前正在运行的Activity，info.baseActivity表系统后台有此进程在运行，具体要做如何判断就看自已的业务需求。这个类还有更多的方法可以取得系统运行的服务、内存使用情况等的方法，请各位自行查找。有一点要注意，如果想正常运行此方法，请在你的AndroidManifest.xml中加入：<uses-permission

android:name="android.permission.GET_TASKS"

/>关于AndroidManifest权限控制详细内容可参考AndroidManifest功能与权限描述大全/**

*

判断应用是否在运行

*

@param

context

*

@return

*/

public

boolean

isRun(Context

context){

ActivityManager

am

=

(ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE);

List<RunningTaskInfo>

list

=

am.getRunningTasks(100);

boolean

isAppRunning

=

false;

String

MY_PKG_NAME

=

"com.ad";

//100表示取的最大的任务数，info.topActivity表示当前正在运行的Activity，info.baseActivity表系统后台有此进程在运行

for

(RunningTaskInfo

info

:

list)

{

if

(info.topActivity.getPackageName().equals(MY_PKG_NAME)

||

info.baseActivity.getPackageName().equals(MY_PKG_NAME))

{

isAppRunning

=

true;

Log.i("ActivityService

isRun()",info.topActivity.getPackageName()

+

"

info.baseActivity.getPackageName()="+info.baseActivity.getPackageName());

break;

}

}

Log.i("ActivityService

isRun()",

"com.ad

程序

...isAppRunning"+isAppRunning);

return

isAppRunning;

}Android系统内部状态信息的相关api：得到ActivityManager：ActivityManager

activityManager

=

(ActivityManager)this.getSystemService(ACTIVITY_SERVICE)

ConfigurationInfo

configurationInfo

=

activityManager.getDeviceConfigurationInfo();获取进程内存状态的信息：Debug.MemoryInfo[]

processMemoryInfo

=

activityManager.getProcessMemoryInfo(processIds)获取当前运行的service信息：List<RunningServiceInfo>

runningServiceInfos

=

activityManager.getRunningServices(MaxValue);获取当前运行的任务信息：List<RunningTaskInfo>

runningTaskInfos

=

activityManager.getRunningTasks(MaxValue);其中runningTaskInfos的topActivity就是当前Task的活跃Activity在getRunningTasks()所返回的Task队列中系统会根据这些Task的活跃度有一个排序，越活跃越是靠前。第一个就是当前活动的Task/**

*

检测某ActivityUpdate是否在当前Task的栈顶

*/

public

boolean

isTopActivy(String

cmdName){

ActivityManager

manager

=

(ActivityManager)

context.getSystemService(ACTIVITY_SERVICE);

List<RunningTaskInfo>

runningTaskInfos

=

manager.getRunningTasks(1);

String

cmpNameTemp

=

null;

if(null

!=

runningTaskInfos){

cmpNameTemp=(runningTaskInfos.get(0).topActivity).toString);

Log.e("cmpname","cmpname:"+cmpName);

}

if(null

==

cmpNameTemp)return

false;

return

cmpNameTemp.equals(cmdName);

}/**get

the

launcher

status

*/

private

boolean

isLauncherRunnig(Context

context)

{

boolean

result

=

false

;

List<String>

names

=

getAllTheLauncher();

ActivityManager

mActivityManager

=

(ActivityManager)

context.getSystemService(Context.ACTIVITY_SERVICE)

;

List<ActivityManager.RunningAppProcessInfo>

appList

=

mActivityManager.getRunningAppProcesses()

;

for

(RunningAppProcessInfo

running

:

appList)

{

if

(running.importance

==

RunningAppProcessInfo.IMPORTANCE_FOREGROUND)

{

for

(int

i

=

0;

i

<

names.size();

i++)

{

if

(names.get(i).equals(cessName))

{

result

=

true

;

break;

}

}

}

}

return

result

;

}/**

*

得到所有的Launcher

*/

private

List<String>

getAllTheLauncher(){

List<String>

names

=

null;

PackageManager

pkgMgt

=

this.getPackageManager();

Intent

it

=

new

Intent(Intent.ACTION_MAIN);

it.addCategory(Intent.CATEGORY_HOME);

List<ResolveInfo>

ra

=pkgMgt.queryIntentActivities(it,0);

if(ra.size()

!=

0){

names

=

new

ArrayList<String>();

}

for(int

i=0;i<

ra.size();i++)

{

String

packageName

=

ra.get(i).activityInfo.packageName;

names.add(packageName);

}

return

names;

}android取当前显示的activity：ActivityManager

am

=

(ActivityManager)

getSystemService(ACTIVITY_SERVICE);

ComponentName

cn

=

am.getRunningTasks(1).get(0).topActivity;

Log.d("",

"pkg:"+cn.getPackageName());

Log.d("",

"cls:"+cn.getClassName());Android如何判断程序是否在前台运行：private

boolean

isTopActivity(){

List<RunningTas