An APP which can monitor the system and inquire hardware information.
(1) RAM usage
public static float getUsedPercentValue(Context context) {
String dir = "/proc/meminfo";
try {
FileReader fr = new FileReader(dir);
BufferedReader br = new BufferedReader(fr, 2048);
String memoryLine = br.readLine();
String subMemoryLine = memoryLine.substring(memoryLine.indexOf("MemTotal:"));
br.close();
long totalMemorySize = Integer.parseInt(subMemoryLine.replaceAll("\\D+", ""));
long availableSize = getAvailableMemory(context) / 1024;
float percent = (float) ((totalMemorySize - availableSize) / (float) totalMemorySize);
return percent;
} catch (IOException e) {
e.printStackTrace();
}
return 0;
}(2) ROM usage
stat = new StatFs(Environment.getExternalStorageDirectory().getPath());
totalBlocks = stat.getBlockCount();
availableBlocks = stat.getAvailableBlocks();
degree4 = (int) ((totalBlocks - availableBlocks) * 100 / totalBlocks);(3) Battery level
private BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
batteryLevel=intent.getIntExtra(BatteryManager.EXTRA_LEVEL,0);
batteryScale=intent.getIntExtra(BatteryManager.EXTRA_SCALE,100);
degree3 = (float) (2.7 * (batteryLevel * 100 / batteryScale));
RotateAnimation animation3 = new RotateAnimation(degree3,
degree3, Animation.RELATIVE_TO_SELF, 0.5f,
Animation.RELATIVE_TO_SELF, 0.5f);
animation3.setDuration(1000);
animation3.setFillAfter(true);
needleView3.startAnimation(animation3);
}
};(4) CPU usage
public void 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]);
this.usage =(currTotal - total) * 100.0f / (currTotal - total + currIdle - idle);
this.total = currTotal;
this.idle = currIdle;
}
catch( IOException ex ){
ex.printStackTrace();
}
}Please read my blog.