Android Open Source - rfcx-guardian-android File Utils

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Back to project page rfcx-guardian-android.

License

The source code is released under:

Apache License

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Java Source Code

package org.rfcx.guardian.utility;
/*from   w  w  w.j a v a2s  .c  o  m*/
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import android.text.TextUtils;
import android.util.Log;

public class FileUtils {
  
  private static final String TAG = FileUtils.class.getSimpleName();
  private static final String NULL_EXC = "Exception thrown, but exception itself is null.";

  
  public String sha1Hash(String filePath) {
    try {
      MessageDigest messageDigest = MessageDigest.getInstance("SHA1");
        FileInputStream fileInputStream = new FileInputStream(filePath);
      byte[] dataBytes = new byte[1024];
        int nread = 0;
        while ((nread = fileInputStream.read(dataBytes)) != -1) {
          messageDigest.update(dataBytes, 0, nread);
        };
        fileInputStream.close();
        byte[] mdbytes = messageDigest.digest();
        StringBuffer stringBuilder = new StringBuffer("");
        for (int i = 0; i < mdbytes.length; i++) {
          stringBuilder.append(Integer.toString((mdbytes[i] & 0xff) + 0x100, 16).substring(1));
        }
      return stringBuilder.toString();
    } catch (NoSuchAlgorithmException e) {
      Log.e(TAG,(e!=null) ? (e.getMessage() +" ||| "+ TextUtils.join(" | ", e.getStackTrace())) : NULL_EXC);
    } catch (FileNotFoundException e) {
      Log.e(TAG,(e!=null) ? (e.getMessage() +" ||| "+ TextUtils.join(" | ", e.getStackTrace())) : NULL_EXC);
    } catch (IOException e) {
      Log.e(TAG,(e!=null) ? (e.getMessage() +" ||| "+ TextUtils.join(" | ", e.getStackTrace())) : NULL_EXC);
    }
    return null;
  }
  
  
  
  public int chmod(File file, int mode) {
    try {
      Class fileUtils = Class.forName("android.os.FileUtils");
      Method setPermissions = fileUtils.getMethod("setPermissions", String.class, int.class, int.class, int.class);
      return (Integer) setPermissions.invoke(null, file.getAbsolutePath(), mode, -1, -1);
    } catch (ClassNotFoundException e) {
      Log.e(TAG,(e!=null) ? (e.getMessage() +" ||| "+ TextUtils.join(" | ", e.getStackTrace())) : NULL_EXC);
    } catch (SecurityException e) {
      Log.e(TAG,(e!=null) ? (e.getMessage() +" ||| "+ TextUtils.join(" | ", e.getStackTrace())) : NULL_EXC);
    } catch (NoSuchMethodException e) {
      Log.e(TAG,(e!=null) ? (e.getMessage() +" ||| "+ TextUtils.join(" | ", e.getStackTrace())) : NULL_EXC);
    } catch (IllegalArgumentException e) {
      Log.e(TAG,(e!=null) ? (e.getMessage() +" ||| "+ TextUtils.join(" | ", e.getStackTrace())) : NULL_EXC);
    } catch (IllegalAccessException e) {
      Log.e(TAG,(e!=null) ? (e.getMessage() +" ||| "+ TextUtils.join(" | ", e.getStackTrace())) : NULL_EXC);
    } catch (InvocationTargetException e) {
      Log.e(TAG,(e!=null) ? (e.getMessage() +" ||| "+ TextUtils.join(" | ", e.getStackTrace())) : NULL_EXC);
    }
    return 0;
  }
  
}

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