android系统信息，cpu、内存、电池等

http://vaero.blog.51cto.com/4350852/778139
package com.lenovo.cpuusage;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;public class CPUUsage {// top命令public static final String[] CMD = { "top -b -n 1" };public static final String[] TOP = { "/system/bin/top", "-n", "1" };public static final String[] TOP_PC = { "top", "-n", "1" };public static final int count = 0;public static void main(String[] args) { String test = run(CMD, "firefox-bin        "); System.out.println(test);}// 现在执行top -n 1，我们只需要第二行（用第二行求得CPU占用率，精确数据）// 第一行：User 35%, System 13%, IOW 0%, IRQ 0% // CPU占用率// 第二行：User 109 + Nice 0 + Sys 40 + Idle 156 + IOW 0 + IRQ 0 + SIRQ 1 = 306// // CPU使用情况public static synchronized String run(String[] cmd) {String line = "";InputStream is = null;try {Runtime runtime = Runtime.getRuntime();Process proc = runtime.exec("top -n 1");is = proc.getInputStream();// 换成BufferedReaderBufferedReader buf = new BufferedReader(new InputStreamReader(is));do {line = buf.readLine();} while (line != null);do {line = buf.readLine();// 前面有几个空行if (line.startsWith("User")) {// 读到第一行时，我们再读取下一行line = buf.readLine();break;}} while (true);if (is != null) {buf.close();is.close();}} catch (IOException e) {e.printStackTrace();}return line;}// 获取指定应用的top命令获取的信息// PID CPU% S #THR VSS RSS PCY UID Name // 进程属性// 如果当前应用不在运行则返回nullpublic static synchronized String run(String[] cmd, String pkgName) {String line = null;InputStream is = null;try {Runtime runtime = Runtime.getRuntime();Process proc = runtime.exec("top -b -n 1");is = proc.getInputStream();// 换成BufferedReaderBufferedReader buf = new BufferedReader(new InputStreamReader(is));do {line = buf.readLine();// 读取到相应pkgName跳出循环（或者未找到）if (null == line || line.endsWith(pkgName)) {break;}} while (true);if (is != null) {buf.close();is.close();}} catch (IOException e) {e.printStackTrace();}return line;}}
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