get Byte Array From External Storage - Android java.io

Android examples for java.io:FileInputStream

  1. HOME
  2. Android
  3. java.io
  4. FileInputStream

Description

get Byte Array From External Storage

Demo Code

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.res.AssetManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.Drawable;
import android.lemon.assist.Check;
import android.lemon.config.BaseConfig;
import android.os.Environment;
import android.os.StatFs;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.nio.channels.FileChannel;
import java.text.DecimalFormat;
import java.util.Comparator;

public class Main{

    public static byte[] getByteArrayFromSD(String path) {
        byte[] bytes = null;
        ByteArrayOutputStream out = null;
        try {//from ww  w.  j a v a  2s  .  co m
            File file = new File(path);

            if (!file.exists()) {
                return null;
            }

            long fileSize = file.length();
            if (fileSize > Integer.MAX_VALUE) {
                return null;
            }

            FileInputStream in = new FileInputStream(path);
            out = new ByteArrayOutputStream(1024);
            byte[] buffer = new byte[1024];
            int size = 0;
            while ((size = in.read(buffer)) != -1) {
                out.write(buffer, 0, size);
            }
            in.close();
            bytes = out.toByteArray();

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (out != null) {
                try {
                    out.close();
                } catch (Exception e) {
                }
            }
        }
        return bytes;
    }

}

Related Tutorials