Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import android.app.ActivityManager;
import android.app.ActivityManager.MemoryInfo;
import android.content.Context;

public class Main {
    private static ActivityManager am = null;
    private static MemoryInfo outInfo = new MemoryInfo();

    /**
     * get total size of ram. Work for API 16 and above.
     * @return total size in byte
     */
    public static long getTotalRamSize(Context context) {
        if (am == null) {
            am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
        }
        am.getMemoryInfo(outInfo);
        return outInfo.totalMem;
    }

    /**
     * get total size of ram. Work for all API levels.
     * @return total size in byte
     * @deprecated
     */
    public static long getTotalRamSize() {
        StringBuilder sb = new StringBuilder();
        //read this file and pick up numbers
        File file = new File("/proc/meminfo");
        BufferedReader br = null;
        try {
            br = new BufferedReader(new FileReader(file));
            String readLine = br.readLine();
            char[] charArray = readLine.toCharArray();
            for (char c : charArray) {
                if (c >= '0' && c <= '9') {
                    sb.append(c);
                }
            }
            String string = sb.toString();
            long parseLong = Long.parseLong(string);
            return parseLong * 1024;
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (br != null) {
                try {
                    br.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return 0;
    }
}