Android5.0以上获取topActivity的包名方法与以下的整合

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最新推荐文章于 2025-07-09 15:01:26 发布

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分类专栏： android 文章标签： android

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本文介绍了一种在Android系统中获取当前处于前台的应用程序包名的方法。此方法适用于Android 5.0及以上版本，通过分析运行进程信息来确定哪个应用处于最顶层。

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/**
* 加入5.0获取当前 topactivity的包名(只能判断应用不再前台) modified by yj.zhang on 2016/10/10
* @param context
* @return
*/
public static String getTopPackgeName(Context context)
{
String packgeName = " ";
if (Build.VERSION.SDK_INT >= 21)
{
LOG.print("--------------------->getTopClassName-- 21--->");
final int PROCESS_STATE_TOP = 2;
ActivityManager.RunningAppProcessInfo currentInfo = null;
Field field = null;
try
{
field = ActivityManager.RunningAppProcessInfo.class.getDeclaredField("processState");
}
catch (Exception ignored)
{
ignored.printStackTrace();
}
ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
List<ActivityManager.RunningAppProcessInfo> appList = am.getRunningAppProcesses();

for (ActivityManager.RunningAppProcessInfo app : appList)
{

if (app.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND && app.importanceReasonCode == ActivityManager.RunningAppProcessInfo.REASON_UNKNOWN)
{
Integer state = null;
try
{
state = field.getInt(app);
}
catch (Exception e)
{
e.printStackTrace();
}

if (state != null && state == PROCESS_STATE_TOP)
{
currentInfo = app;
packgeName = currentInfo.processName;
break;
}
}
}

}else{
ActivityManager mActivityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
if( mActivityManager.getRunningTasks(1).size() > 0 )
{
ComponentName cn = mActivityManager.getRunningTasks(1).get(0).topActivity;
packgeName = cn.getPackageName();
}
}
LOG.print("packgeName=" + packgeName);
return packgeName;
}