read Asset File and return Byte array - Android App

Android examples for App:Assets File

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Description

read Asset File and return Byte array

Demo Code

/*//from   w  w w  .  j  a va  2s  .co m
 * Copyright (C) 2011 Markus Junginger, greenrobot (http://greenrobot.de)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
//package com.java2s;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import android.content.Context;

public class Main {
    public static byte[] readAsset(Context context, String filename)
            throws IOException {
        InputStream in = context.getResources().getAssets().open(filename);
        try {
            return readAllBytes(in);
        } finally {
            in.close();
        }
    }

    public static byte[] readAllBytes(InputStream in) throws IOException {
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        copyAllBytes(in, out);
        return out.toByteArray();
    }

    /**
     * Copies all available data from in to out without closing any stream.
     * 
     * @return number of bytes copied
     */
    public static int copyAllBytes(InputStream in, OutputStream out)
            throws IOException {
        int byteCount = 0;
        byte[] buffer = new byte[4096];
        while (true) {
            int read = in.read(buffer);
            if (read == -1) {
                break;
            }
            out.write(buffer, 0, read);
            byteCount += read;
        }
        return byteCount;
    }
}

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