CPU占用率与内存使用情况

1.内存使用情况，代码如下：

package com.lml.ratetest;

import java.io.BufferedReader;

import java.io.FileReader;

import java.io.IOException;

import android.app.Activity;

import android.app.ActivityManager;

import android.app.ActivityManager.MemoryInfo;

import android.content.Context;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.text.format.Formatter;

import android.util.Log;

import android.widget.TextView;

public class MemoryActivity extends Activity {

TextView tvMemory;

Handler handler;

UpdateThread thread;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.tvactivity);

tvMemory = (TextView) findViewById(R.id.tvRate);

handler = new Handler() {

@Override

public void handleMessage(Message msg) {

if (msg.what == 2) {

tvMemory.setText("RAM一共： " + getTotalMemory() + ", "

+ "可用： " + getAvailMemory()+", 已用："+getUsed());

}

}

};

thread = new UpdateThread();

thread.start();

}

public class UpdateThread extends Thread {

public void run() {

while (!Thread.currentThread().isInterrupted()) {

Message msg = new Message();

msg.what = 2;

handler.sendMessage(msg);

try {

Thread.sleep(1000);

} catch (InterruptedException e) {

Thread.currentThread().interrupt();

}

}

}

}

@Override

protected void onDestroy() {

super.onDestroy();

thread.interrupt();

}

public String getAvailMemory() {

return Formatter.formatFileSize(getBaseContext(), getAvailMemoryByByte());

}

public long getAvailMemoryByByte(){

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

MemoryInfo mi = new MemoryInfo();

am.getMemoryInfo(mi);

return mi.availMem;

}

public long getTotalMemoryByByte(){

String str1 = "/proc/meminfo";// 系统内存信息文件

String str2;

String[] arrayOfString;

long initial_memory = 0;

try {

FileReader localFileReader = new FileReader(str1);

BufferedReader localBufferedReader = new BufferedReader(

localFileReader, 8192);

str2 = localBufferedReader.readLine();// 读取meminfo第一行，系统总内存大小

arrayOfString = str2.split("\\s+");

for (String num : arrayOfString) {

Log.i(str2, num + "\t");

}

initial_memory = Integer.valueOf(arrayOfString[1]).intValue() * 1024;// 获得系统总内存，单位是KB，乘以1024转换为Byte

localBufferedReader.close();

} catch (IOException e) {

return 0;

}

return initial_memory;

}

public String getTotalMemory() {

return Formatter.formatFileSize(getBaseContext(), getTotalMemoryByByte());// Byte转换为KB或者MB，内存大小规格化

}

public long getUsedByByte(){

long used = getTotalMemoryByByte()-getAvailMemoryByByte();

return used;

}

public String getUsed(){

return Formatter.formatFileSize(getBaseContext(), getUsedByByte());

}

}

2.cpu占用率，代码如下：

package com.lml.ratetest;

import java.io.BufferedReader;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStreamReader;

import android.app.Activity;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.widget.TextView;

public class CpuActivity extends Activity {

TextView tvCpu;

long total = 0;

long idle = 0;

double usage = 0;

UpdateThread thread;

Handler handler;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.tvactivity);

tvCpu = (TextView) findViewById(R.id.tvRate);

handler = new Handler() {

@Override

public void handleMessage(Message msg) {

if (msg.what == 3) {

tvCpu.setText("cpu 占用率 : "+Math.round((Double)msg.obj));

}

}

};

thread = new UpdateThread();

thread.start();

}

@Override

protected void onDestroy() {

super.onDestroy();

thread.interrupt();

}

public class UpdateThread extends Thread {

public void run() {

while (!Thread.currentThread().isInterrupted()) {

Message msg = new Message();

msg.what = 3;

msg.obj=readUsage();

handler.sendMessage(msg);

try {

Thread.sleep(1000);

} catch (InterruptedException e) {

Thread.currentThread().interrupt();

}

}

}

}

public double readUsage() {

try {

BufferedReader reader = new BufferedReader(new InputStreamReader(

new FileInputStream("/proc/stat")), 1000);

String load = reader.readLine();

reader.close();

String[] toks = load.split(" ");

long currTotal = Long.parseLong(toks[2]) + Long.parseLong(toks[3])

+ Long.parseLong(toks[4]);

long currIdle = Long.parseLong(toks[5]);

if ((currTotal - total) * 100.0f

/ (currTotal - total + currIdle - idle) >= 0) {

this.usage = (currTotal - total) * 100.0f

/ (currTotal - total + currIdle - idle);

} else {

this.usage = 0;

}

this.total = currTotal;

this.idle = currIdle;

} catch (IOException ex) {

return 0.0;

}

return usage;

}

}