get Top App Info Package Name - Android android.content.pm

Android examples for android.content.pm:PackageManager

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  2. Android
  3. android.content.pm
  4. PackageManager

Description

get Top App Info Package Name

Demo Code

import java.lang.reflect.Field;
import java.util.List;

import android.app.ActivityManager;
import android.content.Context;
import android.os.Build;

public class Main {

  public static String getTopAppInfoPackageName(Context context) {
    if (Build.VERSION.SDK_INT < 21) {
      ActivityManager manager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
      List<ActivityManager.RunningTaskInfo> runningTasks = manager.getRunningTasks(1);

      if (runningTasks != null && runningTasks.size() > 0) {
        return runningTasks.get(0).topActivity.getPackageName();
      } else {/*w  ww. j a  va  2  s .c  o  m*/
        return "";
      }
    } else {
      final int PROCESS_STATE_TOP = 2;
      try {
        Field processStateField = ActivityManager.RunningAppProcessInfo.class.getDeclaredField("processState");
        List<ActivityManager.RunningAppProcessInfo> processes = ((ActivityManager) context
            .getSystemService(Context.ACTIVITY_SERVICE)).getRunningAppProcesses();
        for (ActivityManager.RunningAppProcessInfo process : processes) {
          if (process.importance <= ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND
              && process.importanceReasonCode == 0) {
            int state = processStateField.getInt(process);
            if (state == PROCESS_STATE_TOP) {
              String[] packname = process.pkgList;

              return packname[0];
            }
          }
        }
      } catch (Exception e) {
        e.printStackTrace();
      }
      return "";
    }
  }

}

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