clear Memory - Android android.os

Android examples for android.os:Memory

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Description

clear Memory

Demo Code

import java.util.List;

import android.app.ActivityManager;
import android.content.Context;
import android.util.Log;

public class Main {

  private final static String TAG_SYSTEM_UTIL = "SystemUtil";

  public static void clearMemory(Context context) {
    long beforemem = getAvailableMemory(context);

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

    List<ActivityManager.RunningAppProcessInfo> runningAppProcessInfos;
    List<ActivityManager.RunningServiceInfo> runningServiceInfos;
    if (am != null) {
      runningAppProcessInfos = am.getRunningAppProcesses();
      runningServiceInfos = am.getRunningServices(100);

      if (runningAppProcessInfos != null) {
        for (ActivityManager.RunningAppProcessInfo r : runningAppProcessInfos) {
          if (r.importance > ActivityManager.RunningAppProcessInfo.IMPORTANCE_VISIBLE) {
            String[] pkgList = r.pkgList;
            for (String p : pkgList) {
              am.killBackgroundProcesses(p);
            }//from   w w w.jav a 2s .co m
          }
        }
      }

      if (runningServiceInfos != null) {
        for (ActivityManager.RunningServiceInfo r : runningServiceInfos) {

        }
      }
    }

    long aftermem = getAvailableMemory(context);

  }

  public static long getAvailableMemory(Context context) {
    ActivityManager.MemoryInfo memoryInfo = new ActivityManager.MemoryInfo();
    ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    am.getMemoryInfo(memoryInfo);

    Log.d(TAG_SYSTEM_UTIL, "before clear the memory is " + memoryInfo.availMem / (1024 * 1024));

    return memoryInfo.availMem / (1024 * 1024);
  }

}

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