get Available IO Schedulers from Shell - Android Android OS

Android examples for Android OS:Shell

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Description

get Available IO Schedulers from Shell

Demo Code


import android.content.Context;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.SystemProperties;
import android.util.Log;
import android.widget.Toast;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Date;

public class Main{
    private static final String TAG = Thread.currentThread().getStackTrace()[1].getClassName();
    public static String[] getAvailableIOSchedulers() {
        String[] schedulers = null;
        String[] aux = readStringArray("/sys/block/mmcblk0/queue/scheduler");
        if (aux != null) {
            schedulers = new String[aux.length];
            for (int i = 0; i < aux.length; i++) {
                schedulers[i] = aux[i].charAt(0) == '['
                        ? aux[i].substring(1, aux[i].length() - 1)
                        : aux[i];/*from w w  w .  j  a v  a 2s  . c  om*/
            }
        }
        return schedulers;
    }
    private static String[] readStringArray(String fname) {
        String line = readOneLine(fname);
        if (line != null) {
            return line.split(" ");
        }
        return null;
    }
    public static String readOneLine(String fname) {
        BufferedReader br = null;
        String line = null;
        try {
            br = new BufferedReader(new FileReader(fname), 1024);
            line = br.readLine();
        } catch (FileNotFoundException ignored) {
            Log.d(TAG, "File was not found! trying via shell...");
            return readFileViaShell(fname, true);
        } catch (IOException e) {
            Log.d(TAG, "IOException while reading system file", e);
            return readFileViaShell(fname, true);
        } finally {
            if (br != null) {
                try {
                    br.close();
                } catch (IOException ignored) {
                    // failed to close reader
                }
            }
        }
        return line;
    }
    public static String readFileViaShell(String filePath, boolean useSu) {
        String command = new String("cat " + filePath);
        return useSu ? CMDProcessorAOKP.runSuCommand(command).getStdout()
                : CMDProcessorAOKP.runShellCommand(command).getStdout();
    }
}

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