clear Memory and log result - Android Hardware

Android examples for Hardware:Memory

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Description

clear Memory and log result

Demo Code


//package com.java2s;
import android.app.ActivityManager;

import android.content.Context;

import android.util.Log;
import android.widget.Toast;
import java.util.List;

public class Main {
    private final static String TAG_SYSTEM_UTIL = "SystemUtil";

    public static void clearMemory(Context context) {
        long beforemem = getAvailableMemory(context);
        Log.d(TAG_SYSTEM_UTIL, "before memory:" + beforemem);

        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) {
                            Log.e(TAG_SYSTEM_UTIL, "be killed process:" + p);
                            am.killBackgroundProcesses(p);
                        }/*w w w  .  j ava  2s .c  o m*/
                    }
                }
            }

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

                }
            }
        }

        long aftermem = getAvailableMemory(context);

        Toast.makeText(context,  (aftermem - beforemem) + "MB",
                Toast.LENGTH_LONG).show();
    }

    /**
     * get available memory
     *
     * @param context
     * @return available memory?MB?
     */
    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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