Android application to get the CPU occupancy rate

How to get the application CPU usage in the code ?
best to stick out the code and introduce away .
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http://download.csdn.net/detail/zhoujiyu123/4441637

There is a ready-made code
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Thank you for your reply.
you send this link is to obtain the total system CPU usage.
I need to get the CPU usage of the application .
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has been resolved . acquisition system CPU time and application CPU usage time for comparison drawn application CPU usage

paste the following code :

	private static long getTotalCpuTime() { // 获取系统总CPU使用时间
  		String[] cpuInfos = null;
  		try {
  			BufferedReader reader = new BufferedReader(new InputStreamReader(
  					new FileInputStream("/proc/stat")), 1000);
  			String load = reader.readLine();
  			reader.close();
  			cpuInfos = load.split(" ");
  		} catch (IOException ex) {
  			ex.printStackTrace();
  		}
  		long totalCpu = Long.parseLong(cpuInfos[2])
  				+ Long.parseLong(cpuInfos[3]) + Long.parseLong(cpuInfos[4])
  				+ Long.parseLong(cpuInfos[6]) + Long.parseLong(cpuInfos[5])
  				+ Long.parseLong(cpuInfos[7]) + Long.parseLong(cpuInfos[8]);
  		return totalCpu;
  	}
  
  	private static long getAppCpuTime() { // 获取应用占用的CPU时间
  		String[] cpuInfos = null;
  		try {
  			int pid = android.os.Process.myPid();
  			BufferedReader reader = new BufferedReader(new InputStreamReader(
  					new FileInputStream("/proc/" + pid + "/stat")), 1000);
  			String load = reader.readLine();
  			reader.close();
  			cpuInfos = load.split(" ");
  		} catch (IOException ex) {
  			ex.printStackTrace();
  		}
  		long appCpuTime = Long.parseLong(cpuInfos[13])
  				+ Long.parseLong(cpuInfos[14]) + Long.parseLong(cpuInfos[15])
  				+ Long.parseLong(cpuInfos[16]);
  		return appCpuTime;
  	}

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course, you can use the ADB shell command line to see the CPU usage :
1. usb phone connection
2. at the command line adb shell, into the shell .
3 Type the command top-m 100 | grep com *** ***, followed by the name of the application package grep is used to filter the key . word

as shown below:
C: \ Users \ David Ding> adb shell
root @ p940 :/ # top-m 100 | grep com.ding.dingrecorder
top-m 100 | grep com.ding.dingrecorder
24807 1 0% S 11 501096K 45520K fg u0_a68 com.ding.dingrecorder
24807 1 5% S 11 501232K 45676K fg u0_a68 com.ding.dingrecorder < br>