Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright 2015 OpenMarket Ltd
 *
 * 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.
 */

import android.content.Context;

import android.os.Environment;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;

public class Main {
    /**
     * Copy a file into a dstPath directory.
     * The output filename can be provided.
     * The output file is not overriden if it is already exist.
     * @param context the context
     * @param sourceFile the file source path
     * @param dstDirPath the dst path
     * @param outputFilename optional the output filename
     * @return the downloads file path if the file exists or has been properly saved
     */
    public static String saveFileInto(Context context, File sourceFile, String dstDirPath, String outputFilename) {
        // sanity check
        if ((null == sourceFile) || (null == dstDirPath)) {
            return null;
        }

        // defines another name for the external media
        String dstFileName;

        // build a filename is not provided
        if (null == outputFilename) {
            // extract the file extension from the uri
            int dotPos = sourceFile.getName().lastIndexOf(".");

            String fileExt = "";
            if (dotPos > 0) {
                fileExt = sourceFile.getName().substring(dotPos);
            }

            dstFileName = "MatrixConsole_" + System.currentTimeMillis() + fileExt;
        } else {
            dstFileName = outputFilename;
        }

        File dstDir = Environment.getExternalStoragePublicDirectory(dstDirPath);
        if (dstDir != null) {
            dstDir.mkdirs();
        }

        File dstFile = new File(dstDir, dstFileName);

        // Copy source file to destination
        FileInputStream inputStream = null;
        FileOutputStream outputStream = null;
        try {
            // create only the
            if (!dstFile.exists()) {
                dstFile.createNewFile();

                inputStream = new FileInputStream(sourceFile);
                outputStream = new FileOutputStream(dstFile);

                byte[] buffer = new byte[1024 * 10];
                int len;
                while ((len = inputStream.read(buffer)) != -1) {
                    outputStream.write(buffer, 0, len);
                }
            }
        } catch (Exception e) {
            dstFile = null;
        } finally {
            // Close resources
            try {
                if (inputStream != null)
                    inputStream.close();
                if (outputStream != null)
                    outputStream.close();
            } catch (Exception e) {
            }
        }

        if (null != dstFile) {
            return dstFile.getAbsolutePath();
        } else {
            return null;
        }
    }
}