Hello Developers, in this blog I will discuss with you about Storage Utill which is working for all Android Versions. This is a java code class which you can add to your projects and access File Manager easily. Make sure user have allow storage permission before using it. It means You must have to add storage permission before using it. Thank You
FileUtil
import android.content.ContentResolver;
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.graphics.LightingColorFilter;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.media.ExifInterface;
import android.net.Uri;
import android.os.Environment;
import android.provider.DocumentsContract;
import android.provider.MediaStore;
import android.text.TextUtils;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.net.URLDecoder;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
public class FileUtil {
private static void createNewFile(String path) {
int lastSep = path.lastIndexOf(File.separator);
if (lastSep > 0) {
String dirPath = path.substring(0, lastSep);
makeDir(dirPath);
}
File file = new File(path);
try {
if (!file.exists()) file.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
public static String readFile(String path) {
createNewFile(path);
StringBuilder sb = new StringBuilder();
FileReader fr = null;
try {
fr = new FileReader(new File(path));
char[] buff = new char[1024];
int length = 0;
while ((length = fr.read(buff)) > 0) {
sb.append(new String(buff, 0, length));
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (fr != null) {
try {
fr.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
return sb.toString();
}
public static void writeFile(String path, String str) {
createNewFile(path);
FileWriter fileWriter = null;
try {
fileWriter = new FileWriter(new File(path), false);
fileWriter.write(str);
fileWriter.flush();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (fileWriter != null)
fileWriter.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public static void copyFile(String sourcePath, String destPath) {
if (!isExistFile(sourcePath)) return;
createNewFile(destPath);
FileInputStream fis = null;
FileOutputStream fos = null;
try {
fis = new FileInputStream(sourcePath);
fos = new FileOutputStream(destPath, false);
byte[] buff = new byte[1024];
int length = 0;
while ((length = fis.read(buff)) > 0) {
fos.write(buff, 0, length);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (fis != null) {
try {
fis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (fos != null) {
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
public static void copyDir(String oldPath, String newPath) {
File oldFile = new File(oldPath);
File[] files = oldFile.listFiles();
File newFile = new File(newPath);
if (!newFile.exists()) {
newFile.mkdirs();
}
for (File file : files) {
if (file.isFile()) {
copyFile(file.getPath(), newPath + "/" + file.getName());
} else if (file.isDirectory()) {
copyDir(file.getPath(), newPath + "/" + file.getName());
}
}
}
public static void moveFile(String sourcePath, String destPath) {
copyFile(sourcePath, destPath);
deleteFile(sourcePath);
}
public static void deleteFile(String path) {
File file = new File(path);
if (!file.exists()) return;
if (file.isFile()) {
file.delete();
return;
}
File[] fileArr = file.listFiles();
if (fileArr != null) {
for (File subFile : fileArr) {
if (subFile.isDirectory()) {
deleteFile(subFile.getAbsolutePath());
}
if (subFile.isFile()) {
subFile.delete();
}
}
}
file.delete();
}
public static boolean isExistFile(String path) {
File file = new File(path);
return file.exists();
}
public static void makeDir(String path) {
if (!isExistFile(path)) {
File file = new File(path);
file.mkdirs();
}
}
public static void listDir(String path, ArrayList<String> list) {
File dir = new File(path);
if (!dir.exists() || dir.isFile()) return;
File[] listFiles = dir.listFiles();
if (listFiles == null || listFiles.length <= 0) return;
if (list == null) return;
list.clear();
for (File file : listFiles) {
list.add(file.getAbsolutePath());
}
}
public static boolean isDirectory(String path) {
if (!isExistFile(path)) return false;
return new File(path).isDirectory();
}
public static boolean isFile(String path) {
if (!isExistFile(path)) return false;
return new File(path).isFile();
}
public static long getFileLength(String path) {
if (!isExistFile(path)) return 0;
return new File(path).length();
}
public static String getExternalStorageDir() {
return Environment.getExternalStorageDirectory().getAbsolutePath();
}
public static String getPackageDataDir(Context context) {
return context.getExternalFilesDir(null).getAbsolutePath();
}
public static String getPublicDir(String type) {
return Environment.getExternalStoragePublicDirectory(type).getAbsolutePath();
}
public static String convertUriToFilePath(final Context context, final Uri uri) {
String path = null;
if (DocumentsContract.isDocumentUri(context, uri)) {
if (isExternalStorageDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
if ("primary".equalsIgnoreCase(type)) {
path = Environment.getExternalStorageDirectory() + "/" + split[1];
}
} else if (isDownloadsDocument(uri)) {
final String id = DocumentsContract.getDocumentId(uri);
if (!TextUtils.isEmpty(id)) {
if (id.startsWith("raw:")) {
return id.replaceFirst("raw:", "");
}
}
final Uri contentUri = ContentUris
.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
path = getDataColumn(context, contentUri, null, null);
} else if (isMediaDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
Uri contentUri = null;
if ("image".equals(type)) {
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else if ("video".equals(type)) {
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
} else if ("audio".equals(type)) {
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
}
final String selection = "_id=?";
final String[] selectionArgs = new String[]{
split[1]
};
path = getDataColumn(context, contentUri, selection, selectionArgs);
}
} else if (ContentResolver.SCHEME_CONTENT.equalsIgnoreCase(uri.getScheme())) {
path = getDataColumn(context, uri, null, null);
} else if (ContentResolver.SCHEME_FILE.equalsIgnoreCase(uri.getScheme())) {
path = uri.getPath();
}
if (path != null) {
try {
return URLDecoder.decode(path, "UTF-8");
} catch(Exception e) {
return null;
}
}
return null;
}
private static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {
final String column = MediaStore.Images.Media.DATA;
final String[] projection = {
column
};
try (Cursor cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null)) {
if (cursor != null && cursor.moveToFirst()) {
final int column_index = cursor.getColumnIndexOrThrow(column);
return cursor.getString(column_index);
}
} catch (Exception e) {
}
return null;
}
private static boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".equals(uri.getAuthority());
}
private static boolean isDownloadsDocument(Uri uri) {
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}
private static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
private static void saveBitmap(Bitmap bitmap, String destPath) {
FileUtil.createNewFile(destPath);
try (FileOutputStream out = new FileOutputStream(new File(destPath))) {
bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
} catch (Exception e) {
e.printStackTrace();
}
}
public static Bitmap getScaledBitmap(String path, int max) {
Bitmap src = BitmapFactory.decodeFile(path);
int width = src.getWidth();
int height = src.getHeight();
float rate = 0.0f;
if (width > height) {
rate = max / (float) width;
height = (int) (height * rate);
width = max;
} else {
rate = max / (float) height;
width = (int) (width * rate);
height = max;
}
return Bitmap.createScaledBitmap(src, width, height, true);
}
public static int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {
final int width = options.outWidth;
final int height = options.outHeight;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
final int halfHeight = height / 2;
final int halfWidth = width / 2;
while ((halfHeight / inSampleSize) >= reqHeight && (halfWidth / inSampleSize) >= reqWidth) {
inSampleSize *= 2;
}
}
return inSampleSize;
}
public static Bitmap decodeSampleBitmapFromPath(String path, int reqWidth, int reqHeight) {
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(path, options);
options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
options.inJustDecodeBounds = false;
return BitmapFactory.decodeFile(path, options);
}
public static void resizeBitmapFileRetainRatio(String fromPath, String destPath, int max) {
if (!isExistFile(fromPath)) return;
Bitmap bitmap = getScaledBitmap(fromPath, max);
saveBitmap(bitmap, destPath);
}
public static void resizeBitmapFileToSquare(String fromPath, String destPath, int max) {
if (!isExistFile(fromPath)) return;
Bitmap src = BitmapFactory.decodeFile(fromPath);
Bitmap bitmap = Bitmap.createScaledBitmap(src, max, max, true);
saveBitmap(bitmap, destPath);
}
public static void resizeBitmapFileToCircle(String fromPath, String destPath) {
if (!isExistFile(fromPath)) return;
Bitmap src = BitmapFactory.decodeFile(fromPath);
Bitmap bitmap = Bitmap.createBitmap(src.getWidth(),
src.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
final int color = 0xff424242;
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, src.getWidth(), src.getHeight());
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
canvas.drawCircle(src.getWidth() / 2, src.getHeight() / 2,
src.getWidth() / 2, paint);
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
canvas.drawBitmap(src, rect, rect, paint);
saveBitmap(bitmap, destPath);
}
public static void resizeBitmapFileWithRoundedBorder(String fromPath, String destPath, int pixels) {
if (!isExistFile(fromPath)) return;
Bitmap src = BitmapFactory.decodeFile(fromPath);
Bitmap bitmap = Bitmap.createBitmap(src.getWidth(), src
.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
final int color = 0xff424242;
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, src.getWidth(), src.getHeight());
final RectF rectF = new RectF(rect);
final float roundPx = pixels;
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
canvas.drawBitmap(src, rect, rect, paint);
saveBitmap(bitmap, destPath);
}
public static void cropBitmapFileFromCenter(String fromPath, String destPath, int w, int h) {
if (!isExistFile(fromPath)) return;
Bitmap src = BitmapFactory.decodeFile(fromPath);
int width = src.getWidth();
int height = src.getHeight();
if (width < w && height < h) return;
int x = 0;
int y = 0;
if (width > w) x = (width - w) / 2;
if (height > h) y = (height - h) / 2;
int cw = w;
int ch = h;
if (w > width) cw = width;
if (h > height) ch = height;
Bitmap bitmap = Bitmap.createBitmap(src, x, y, cw, ch);
saveBitmap(bitmap, destPath);
}
public static void rotateBitmapFile(String fromPath, String destPath, float angle) {
if (!isExistFile(fromPath)) return;
Bitmap src = BitmapFactory.decodeFile(fromPath);
Matrix matrix = new Matrix();
matrix.postRotate(angle);
Bitmap bitmap = Bitmap.createBitmap(src, 0, 0, src.getWidth(), src.getHeight(), matrix, true);
saveBitmap(bitmap, destPath);
}
public static void scaleBitmapFile(String fromPath, String destPath, float x, float y) {
if (!isExistFile(fromPath)) return;
Bitmap src = BitmapFactory.decodeFile(fromPath);
Matrix matrix = new Matrix();
matrix.postScale(x, y);
int w = src.getWidth();
int h = src.getHeight();
Bitmap bitmap = Bitmap.createBitmap(src, 0, 0, w, h, matrix, true);
saveBitmap(bitmap, destPath);
}
public static void skewBitmapFile(String fromPath, String destPath, float x, float y) {
if (!isExistFile(fromPath)) return;
Bitmap src = BitmapFactory.decodeFile(fromPath);
Matrix matrix = new Matrix();
matrix.postSkew(x, y);
int w = src.getWidth();
int h = src.getHeight();
Bitmap bitmap = Bitmap.createBitmap(src, 0, 0, w, h, matrix, true);
saveBitmap(bitmap, destPath);
}
public static void setBitmapFileColorFilter(String fromPath, String destPath, int color) {
if (!isExistFile(fromPath)) return;
Bitmap src = BitmapFactory.decodeFile(fromPath);
Bitmap bitmap = Bitmap.createBitmap(src, 0, 0,
src.getWidth() - 1, src.getHeight() - 1);
Paint p = new Paint();
ColorFilter filter = new LightingColorFilter(color, 1);
p.setColorFilter(filter);
Canvas canvas = new Canvas(bitmap);
canvas.drawBitmap(bitmap, 0, 0, p);
saveBitmap(bitmap, destPath);
}
public static void setBitmapFileBrightness(String fromPath, String destPath, float brightness) {
if (!isExistFile(fromPath)) return;
Bitmap src = BitmapFactory.decodeFile(fromPath);
ColorMatrix cm = new ColorMatrix(new float[]
{
1, 0, 0, 0, brightness,
0, 1, 0, 0, brightness,
0, 0, 1, 0, brightness,
0, 0, 0, 1, 0
});
Bitmap bitmap = Bitmap.createBitmap(src.getWidth(), src.getHeight(), src.getConfig());
Canvas canvas = new Canvas(bitmap);
Paint paint = new Paint();
paint.setColorFilter(new ColorMatrixColorFilter(cm));
canvas.drawBitmap(src, 0, 0, paint);
saveBitmap(bitmap, destPath);
}
public static void setBitmapFileContrast(String fromPath, String destPath, float contrast) {
if (!isExistFile(fromPath)) return;
Bitmap src = BitmapFactory.decodeFile(fromPath);
ColorMatrix cm = new ColorMatrix(new float[]
{
contrast, 0, 0, 0, 0,
0, contrast, 0, 0, 0,
0, 0, contrast, 0, 0,
0, 0, 0, 1, 0
});
Bitmap bitmap = Bitmap.createBitmap(src.getWidth(), src.getHeight(), src.getConfig());
Canvas canvas = new Canvas(bitmap);
Paint paint = new Paint();
paint.setColorFilter(new ColorMatrixColorFilter(cm));
canvas.drawBitmap(src, 0, 0, paint);
saveBitmap(bitmap, destPath);
}
public static int getJpegRotate(String filePath) {
int rotate = 0;
try {
ExifInterface exif = new ExifInterface(filePath);
int iOrientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, -1);
switch (iOrientation) {
case ExifInterface.ORIENTATION_ROTATE_90:
rotate = 90;
break;
case ExifInterface.ORIENTATION_ROTATE_180:
rotate = 180;
break;
case ExifInterface.ORIENTATION_ROTATE_270:
rotate = 270;
break;
}
} catch (IOException e) {
return 0;
}
return rotate;
}
public static File createNewPictureFile(Context context) {
SimpleDateFormat date = new SimpleDateFormat("yyyyMMdd_HHmmss");
String fileName = date.format(new Date()) + ".jpg";
return new File(context.getExternalFilesDir(Environment.DIRECTORY_DCIM).getAbsolutePath() + File.separator + fileName);
}
}How to use this class in an Android Project ?
The uses of this class is easy. Just add this class into your project and allow its functions.
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