Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import android.content.Context;

import android.net.Uri;

public class Main {
    /**
     * Copy all the files from a folder to another.
     * @param srcFolder Source folder.
     * @param dstFolder Destination folder.
     * @param cleanDstFolder Tell if destination folder has to be cleared before the copy starts.
     * @return {@code true} if all the files where copied, {@code false} otherwise.
     */
    public static boolean copyFiles(File srcFolder, File dstFolder, boolean cleanDstFolder) {
        boolean retVal = true;
        File[] files;

        //Clean destination folder
        if (cleanDstFolder) {
            files = dstFolder.listFiles();
            if (files != null) {
                for (File file : files) {
                    file.delete();
                }
            }
        }

        //Copy files
        files = srcFolder.listFiles();
        if (files != null) {
            for (File file : files) {
                boolean copied = copyFile(file, new File(dstFolder, file.getName()));
                retVal = retVal && copied;
            }
        }

        return retVal;
    }

    /**
     * Copy a file.
     * @param src Source file.
     * @param dst Destination file.
     * @return {@code true} if the copy succeeded, {@code false} otherwise.
     */
    public static boolean copyFile(File src, File dst) {
        boolean retVal = false;
        try {
            InputStream inStream = new FileInputStream(src);
            try {
                OutputStream outStream = new FileOutputStream(dst);
                try {
                    copyFile(inStream, outStream);
                    retVal = true;
                } finally {
                    outStream.close();
                }
            } finally {
                inStream.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return retVal;
    }

    /**
     * Copy a file from an Uri.
     * @param ctx Context.
     * @param src Source file.
     * @param dst Destination file.
     * @return {@code true} if the copy succeeded, {@code false} otherwise.
     */
    public static boolean copyFile(Context ctx, Uri srcUri, File dst) {
        boolean retVal = false;
        try {
            InputStream inStream = ctx.getContentResolver().openInputStream(srcUri);
            try {
                OutputStream outStream = new FileOutputStream(dst);
                try {
                    copyFile(inStream, outStream);
                    retVal = true;
                } finally {
                    outStream.close();
                }
            } finally {
                inStream.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return retVal;
    }

    protected static void copyFile(InputStream inStream, OutputStream outStream) throws IOException {
        byte[] buf = new byte[2048];
        int len;
        while ((len = inStream.read(buf)) > 0) {
            outStream.write(buf, 0, len);
        }
    }
}