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I'm trying to decode and encode a Bitmap image. On some devices it runs perfectly while on others it's not. I'm uploading Base64 String to the server and getting Base64 String from the server. I've found various solutions but still am not able to solve my issue. Here's my code:
Encoding:
button1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent i = new Intent(
Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
getActivity().startActivityForResult(i, RESULT_LOAD_IMAGE);
}
});
//Image loading from Gallery
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK
&& null != data) {
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
picturePath = cursor.getString(columnIndex);
cursor.close();
imageView1.setImageBitmap(BitmapFactory.decodeFile(picturePath));
if (picturePath != null && !TextUtils.isEmpty(picturePath)) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
Bitmap bitmap = BitmapFactory.decodeFile(picturePath, options);
base64ImageSend = ImageBase64.encodeTobase64(bitmap);
Log.i("Base 64 Image", base64ImageSend);
} else {
base64ImageSend = "";
}
}
}
Decoding:
private String base64StringReceive = "/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEB AQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQH/2wBDAQEBAQEBAQEBAQEBAQEBAQEBAQEB AQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQH/wAARCADhAOEDASIA AhEBAxEB/8QAHwAAAQUBAQEBAQEAAAAAAAAAAAECAwQFBgcICQoL/8QAtRAAAgEDAwIEAwUFBAQA AAF9AQIDAAQRBRIhMUEGE1FhByJxFDKBkaEII0KxwRVS0fAkM2JyggkKFhcYGRolJicoKSo0NTY3 ODk6Q0RFRkdISUpTVFVWV1hZWmNkZWZnaGlqc3R1dnd4eXqDhIWGh4iJipKTlJWWl5iZmqKjpKWm p6ipqrKztLW2t7i5usLDxMXGx8jJytLT1NXW19jZ2uHi4+Tl5ufo6erx8vP09fb3+Pn6/8QAHwEA AwEBAQEBAQEBAQAAAAAAAAECAwQFBgcICQoL/8QAtREAAgECBAQDBAcFBAQAAQJ3AAECAxEEBSEx BhJBUQdhcRMiMoEIFEKRobHBCSMzUvAVYnLRChYkNOEl8RcYGRomJygpKjU2Nzg5OkNERUZHSElK U1RVVldYWVpjZGVmZ2hpanN0dXZ3eHl6goOEhYaHiImKkpOUlZaXmJmaoqOkpaanqKmqsrO0tba3 uLm6wsPExcbHyMnK0tPU1dbX2Nna4uPk5ebn6Onq8vP09fb3+Pn6/9oADAMBAAIRAxEAPwD+/iii igAooooAKKKKACiiigAooriPH/xB8GfC7wd4i+IPj3XbHw54T8J6e+p+INe1BilnYaerFWkdgc8n 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button2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Bitmap bitmap = ImageBase64.decodeBase64(base64StringReceive,MainActivity.this);
imageView2.setImageBitmap(bitmap);
}
});
ImageBase64.java:
import java.io.ByteArrayOutputStream;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Base64;
import android.util.Log;
public static String encodeTobase64(Bitmap image) {
ByteArrayOutputStream baos=new ByteArrayOutputStream();
image.compress(Bitmap.CompressFormat.JPEG,100, baos);
byte [] b=baos.toByteArray();
String temp=null;
try{
System.gc();
temp=Base64.encodeToString(b, Base64.DEFAULT);
}catch(Exception e){
e.printStackTrace();
}catch(OutOfMemoryError e){
baos=new ByteArrayOutputStream();
image.compress(Bitmap.CompressFormat.JPEG,50, baos);
b=baos.toByteArray();
temp=Base64.encodeToString(b, Base64.DEFAULT);
Log.e("EWN", "Out of memory error catched");
}
return temp;
}
public static Bitmap decodeBase64(String input,Context context) {
byte[] decodedByte = Base64.decode(input, 0);
Boolean isSDPresent = android.os.Environment
.getExternalStorageState().equals(
android.os.Environment.MEDIA_MOUNTED);
File sdCardDirectory;
if (isSDPresent) {
// yes SD-card is present
sdCardDirectory = new File(
Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),
"myFile");
if (!sdCardDirectory.exists()) {
if (!sdCardDirectory.mkdirs()) {
Log.d("MySnaps", "failed to create directory");
}
}
} else {
// Sorry
sdCardDirectory = new File(context.getCacheDir(),"");
}
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss")
.format(new Date());
Random rand = new Random();
// nextInt is normally exclusive of the top value,
// so add 1 to make it inclusive
int randomNum = rand.nextInt((1000 - 0) + 1) + 0;
String nw = "IMG_" + timeStamp + randomNum+".jpg";// also tried .txt as file extension
File image = new File(sdCardDirectory, nw);
// Encode the file as a PNG image.
FileOutputStream outStream;
try {
outStream = new FileOutputStream(image);
outStream.write(input.getBytes());
outStream.flush();
outStream.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
Log.i("Compress bitmap path", image.getPath());
return decodeFile(image); // BitmapFactory.decodeByteArray(decodedByte, 0, decodedByte.length);
}
private static Bitmap decodeFile(File f){
try {
//Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeStream(new FileInputStream(f),null,o);
//The new size we want to scale to
final int REQUIRED_SIZE=70;
//Find the correct scale value. It should be the power of 2.
int scale=1;
while(o.outWidth/scale>=REQUIRED_SIZE && o.outHeight/scale>=REQUIRED_SIZE)
scale*=2;
//Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize=scale;
return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
} catch (FileNotFoundException e) {}
return null;
}
Error Stack:
java.lang.OutOfMemoryError
at android.graphics.BitmapFactory.nativeDecodeByteArray(Native Method)
at android.graphics.BitmapFactory.decodeByteArray(BitmapFactory.java:510)
at android.graphics.BitmapFactory.decodeByteArray(BitmapFactory.java:533)
at com.utility.ImageBase64.decodeBase64(ImageBase64.java:32)
at com.activity.HomeFragment.onCreateView(HomeFragment.java:138)
at android.app.Fragment.performCreateView(Fragment.java:1700)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:890)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1062)
at android.app.BackStackRecord.popFromBackStack(BackStackRecord.java:773)
at android.app.FragmentManagerImpl.popBackStackState(FragmentManager.java:1498)
at android.app.FragmentManagerImpl.popBackStackImmediate(FragmentManager.java:495)
at android.app.Activity.onBackPressed(Activity.java:2232)
at com.activity.MainActivity.onBackPressed(MainActivity.java:534)
at android.app.Activity.onKeyUp(Activity.java:2210)
at android.view.KeyEvent.dispatch(KeyEvent.java:2664)
at android.app.Activity.dispatchKeyEvent(Activity.java:2440)
at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1962)
at android.view.ViewRootImpl$ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:3884)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:3858)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3426)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3476)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3445)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3552)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3453)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3609)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3426)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3476)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3445)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3453)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3426)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3476)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3445)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3585)
at android.view.ViewRootImpl$ImeInputStage.onFinishedInputEvent(ViewRootImpl.java:3750)
at android.view.inputmethod.InputMethodManager$PendingEvent.run(InputMethodManager.java:2027)
at android.view.inputmethod.InputMethodManager.invokeFinishedInputEventCallback(InputMethodManager.java:1721)
at android.view.inputmethod.InputMethodManager.finishedInputEvent(InputMethodManager.java:1712)
at android.view.inputmethod.InputMethodManager$ImeInputEventSender.onInputEventFinished(InputMethodManager.java:2004)
at android.view.InputEventSender.dispatchInputEventFinished(InputEventSender.java:141)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:138)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:5050)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:806)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:622)
at dalvik.system.NativeStart.main(Native Method)
I'm also getting this error too in some devices:
java.lang.OutOfMemoryError: Failed to allocate a 38340876 byte allocation with 994361 free bytes and 971KB until OOM
at dalvik.system.VMRuntime.newNonMovableArray(Native Method)
at android.graphics.BitmapFactory.nativeDecodeByteArray(Native Method)
at android.graphics.BitmapFactory.decodeByteArray(BitmapFactory.java:655)
at android.graphics.BitmapFactory.decodeByteArray(BitmapFactory.java:678)
at com.myapp.utility.ImageBase64.decodeBase64(ImageBase64.java:53)
at com.myapp.activity.DetailProfileFragment.onCreateView(DetailProfileFragment.java:103)
at android.app.Fragment.performCreateView(Fragment.java:2114)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:904)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1082)
at android.app.BackStackRecord.run(BackStackRecord.java:833)
at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1467)
at android.app.FragmentManagerImpl$1.run(FragmentManager.java:452)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5944)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1389)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1184)
Solutions that I have already tried are:
Strange out of memory issue while loading an image to a Bitmap object
How to convert a image into Base64 string?
Out of Memory Error ImageView issue
Out of memory error on Android
Image encoding and Decoding using Base64 in android application
467
When showing Bitmap in ImageView from a file first decode it with the help of BitmapHelper.decodeFile(picturePath, 200, 200, true) this will return compressed Bitmap so that while encoding this Bitmap you can handle high resolution images as well as heavy size images upto 100 MB of file.
After decoding file set it to your ImageView and to get Base64 String form above compressed image using BitmapHelper class; get Bitmap from your ImageView (i.e. already been compressed) and use ImageBase64.encodeTobase64(bitmap) this will again compress the file and make handle OutOfMemory exception while Encoding a Bitmap.
For decoding first write your Base64String to file in your device memory. Then read Bytes in chunks and decode that ByteArray by this you will have your bitmap in your memory. After this scale down this bitmap using decodeFile() method then you will have compressed Bitmap from Base64String
I have searched various blogs and post and from them I have taken best suitable code and combined them into one to make more reliable. Try below code to make encoding and decoding more faster with meory management.
To decode Base64String
Bitmap bitmap = ImageBase64.decodeBase64(base64ImageStr,MainActivity.this);
imageView.setImageBitmap(bitmap);
bitmap = null;
System.gc();
To encode Bitmap Try this:
imageView.setImageBitmap(BitmapHelper.decodeFile(picturePath, 200, 200, true));
Bitmap bitmap = ((BitmapDrawable)imageView.getDrawable()).getBitmap();
base64ImageStr = ImageBase64.encodeTobase64(bitmap);
Try This code for ImageBase64
public class ImageBase64 {
private ImageBase64() {
super();
}
private static Context appContext;
public static String encodeTobase64(Bitmap image) {
ByteArrayOutputStream baos=new ByteArrayOutputStream();
image.compress(Bitmap.CompressFormat.JPEG,100, baos);
byte [] b=baos.toByteArray();
String temp=null;
try{
System.gc();
temp=Base64.encodeToString(b, Base64.DEFAULT);
}catch(Exception e){
e.printStackTrace();
}catch(OutOfMemoryError e){
baos=new ByteArrayOutputStream();
image.compress(Bitmap.CompressFormat.JPEG,50, baos);
b=baos.toByteArray();
temp=Base64.encodeToString(b, Base64.DEFAULT);
Log.e("EWN", "Out of memory error catched");
}
return temp;
}
public static Bitmap decodeBase64(String input,Context context) {
byte[] decodedByte = Base64.decode(input, 0);
appContext = context;
Boolean isSDPresent = android.os.Environment
.getExternalStorageState().equals(
android.os.Environment.MEDIA_MOUNTED);
File sdCardDirectory;
if (isSDPresent) {
// yes SD-card is present
sdCardDirectory = new File(
Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),
"IMG");
if (!sdCardDirectory.exists()) {
if (!sdCardDirectory.mkdirs()) {
Log.d("MySnaps", "failed to create directory");
}
}
} else {
// Sorry
sdCardDirectory = new File(context.getCacheDir(),"");
}
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss")
.format(new Date());
Random rand = new Random();
// nextInt is normally exclusive of the top value,
// so add 1 to make it inclusive
int randomNum = rand.nextInt((1000 - 0) + 1) + 0;
String nw = "IMG_" + timeStamp + randomNum+".txt";
File image = new File(sdCardDirectory, nw);
// Encode the file as a PNG image.
FileOutputStream outStream;
try {
outStream = new FileOutputStream(image);
outStream.write(input.getBytes());
outStream.flush();
outStream.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
Log.i("Compress bitmap path", image.getPath());
Bitmap bitmap;
try{
bitmap = BitmapFactory.decodeByteArray(decodedByte, 0, decodedByte.length);
}catch(OutOfMemoryError e){
e.printStackTrace();
InputStream is = context.getResources().openRawResource(R.drawable.default_profile_pic);
bitmap = BitmapFactory.decodeStream(is);
}catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
bitmap=null;
}
return bitmap;//BitmapFactory.decodeByteArray(decodedByte, 0, decodedByte.length);
//return decodeFile(image);
}
private static Bitmap decodeFile(File f){
try {
//Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeStream(new FileInputStream(f),null,o);
//The new size we want to scale to
final int REQUIRED_SIZE=70;
//Find the correct scale value. It should be the power of 2.
int scale=1;
while(o.outWidth/scale>=REQUIRED_SIZE && o.outHeight/scale>=REQUIRED_SIZE)
scale*=2;
//Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize=scale;
Bitmap bmp = BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
Boolean isSDPresent = android.os.Environment
.getExternalStorageState().equals(
android.os.Environment.MEDIA_MOUNTED);
File sdCardDirectory;
if (isSDPresent) {
// yes SD-card is present
sdCardDirectory = new File(
Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),
"IMG");
if (!sdCardDirectory.exists()) {
if (!sdCardDirectory.mkdirs()) {
Log.d("MySnaps", "failed to create directory");
}
}
} else {
// Sorry
sdCardDirectory = new File(appContext.getCacheDir(),"");
}
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss")
.format(new Date());
Random rand = new Random();
// nextInt is normally exclusive of the top value,
// so add 1 to make it inclusive
int randomNum = rand.nextInt((1000 - 0) + 1) + 0;
String nw = "IMG_" + timeStamp + randomNum+".png";
File image = new File(sdCardDirectory, nw);
FileOutputStream out = null;
try {
out = new FileOutputStream(image);
bmp.compress(Bitmap.CompressFormat.PNG, 100, out); // bmp is your Bitmap instance
// PNG is a lossless format, the compression factor (100) is ignored
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (out != null) {
out.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
String pathNew =compressImage(image.getAbsolutePath());
Uri uri = Uri.parse(pathNew);
Bitmap bitmap=null ;
try {
bitmap = MediaStore.Images.Media.getBitmap(appContext.getContentResolver(),uri);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return bitmap;
} catch (FileNotFoundException e) {}
return null;
}
public static String compressImage(String imageUri) {
String filePath = imageUri;//getRealPathFromURI(imageUri);
Bitmap scaledBitmap = null;
BitmapFactory.Options options = new BitmapFactory.Options();
// by setting this field as true, the actual bitmap pixels are not loaded in the memory. Just the bounds are loaded. If
// you try the use the bitmap here, you will get null.
options.inJustDecodeBounds = true;
Bitmap bmp = BitmapFactory.decodeFile(filePath, options);
int actualHeight = options.outHeight;
int actualWidth = options.outWidth;
// max Height and width values of the compressed image is taken as 816x612
float maxHeight = 816.0f;
float maxWidth = 612.0f;
float imgRatio = actualWidth / actualHeight;
float maxRatio = maxWidth / maxHeight;
// width and height values are set maintaining the aspect ratio of the image
if (actualHeight > maxHeight || actualWidth > maxWidth) {
if (imgRatio < maxRatio) { imgRatio = maxHeight / actualHeight; actualWidth = (int) (imgRatio * actualWidth); actualHeight = (int) maxHeight; } else if (imgRatio > maxRatio) {
imgRatio = maxWidth / actualWidth;
actualHeight = (int) (imgRatio * actualHeight);
actualWidth = (int) maxWidth;
} else {
actualHeight = (int) maxHeight;
actualWidth = (int) maxWidth;
}
}
// setting inSampleSize value allows to load a scaled down version of the original image
options.inSampleSize = calculateInSampleSize(options, actualWidth, actualHeight);
// inJustDecodeBounds set to false to load the actual bitmap
options.inJustDecodeBounds = false;
// this options allow android to claim the bitmap memory if it runs low on memory
options.inPurgeable = true;
options.inInputShareable = true;
options.inTempStorage = new byte[16 * 1024];
try {
// load the bitmap from its path
bmp = BitmapFactory.decodeFile(filePath, options);
} catch (OutOfMemoryError exception) {
exception.printStackTrace();
}
try {
scaledBitmap = Bitmap.createBitmap(actualWidth, actualHeight,Bitmap.Config.ARGB_8888);
} catch (OutOfMemoryError exception) {
exception.printStackTrace();
}
float ratioX = actualWidth / (float) options.outWidth;
float ratioY = actualHeight / (float) options.outHeight;
float middleX = actualWidth / 2.0f;
float middleY = actualHeight / 2.0f;
Matrix scaleMatrix = new Matrix();
scaleMatrix.setScale(ratioX, ratioY, middleX, middleY);
Canvas canvas = new Canvas(scaledBitmap);
canvas.setMatrix(scaleMatrix);
canvas.drawBitmap(bmp, middleX - bmp.getWidth() / 2, middleY - bmp.getHeight() / 2, new Paint(Paint.FILTER_BITMAP_FLAG));
// check the rotation of the image and display it properly
ExifInterface exif;
try {
exif = new ExifInterface(filePath);
int orientation = exif.getAttributeInt(
ExifInterface.TAG_ORIENTATION, 0);
Log.d("EXIF", "Exif: " + orientation);
Matrix matrix = new Matrix();
if (orientation == 6) {
matrix.postRotate(90);
Log.d("EXIF", "Exif: " + orientation);
} else if (orientation == 3) {
matrix.postRotate(180);
Log.d("EXIF", "Exif: " + orientation);
} else if (orientation == 8) {
matrix.postRotate(270);
Log.d("EXIF", "Exif: " + orientation);
}
scaledBitmap = Bitmap.createBitmap(scaledBitmap, 0, 0,
scaledBitmap.getWidth(), scaledBitmap.getHeight(), matrix,
true);
} catch (IOException e) {
e.printStackTrace();
}
FileOutputStream out = null;
String filename = getFilename();
try {
out = new FileOutputStream(filename);
// write the compressed bitmap at the destination specified by filename.
scaledBitmap.compress(Bitmap.CompressFormat.JPEG, 80, out);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
return filename;
}
public static int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
final int heightRatio = Math.round((float) height/ (float) reqHeight);
final int widthRatio = Math.round((float) width / (float) reqWidth);
inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio; } final float totalPixels = width * height; final float totalReqPixelsCap = reqWidth * reqHeight * 2; while (totalPixels / (inSampleSize * inSampleSize) > totalReqPixelsCap) {
inSampleSize++;
}
return inSampleSize;
}
public static String getFilename() {
/*File file = new File(Environment.getExternalStorageDirectory().getPath(), "IMG/Images");
if (!file.exists()) {
file.mkdirs();
}
String uriSting = (file.getAbsolutePath() + "/" + System.currentTimeMillis() + ".jpg");
*/
Boolean isSDPresent = android.os.Environment
.getExternalStorageState().equals(
android.os.Environment.MEDIA_MOUNTED);
File sdCardDirectory;
if (isSDPresent) {
// yes SD-card is present
sdCardDirectory = new File(
Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).getPath(),
"IMG/Images");
if (!sdCardDirectory.exists()) {
if (!sdCardDirectory.mkdirs()) {
Log.d("MySnaps", "failed to create directory");
}
}
} else {
// Sorry
sdCardDirectory = new File(appContext.getCacheDir(),"");
}
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss")
.format(new Date());
Random rand = new Random();
// nextInt is normally exclusive of the top value,
// so add 1 to make it inclusive
int randomNum = rand.nextInt((1000 - 0) + 1) + 0;
String nw = "img_" + timeStamp + randomNum+".jpg";
File image = new File(sdCardDirectory, nw);
String uriSting1 = (sdCardDirectory.getAbsolutePath() + "/" + nw);//System.currentTimeMillis() + ".jpg");
return uriSting1;
}
}
Add this class to handle heavy images
public class BitmapHelper
{
//decodes image and scales it to reduce memory consumption
public static Bitmap decodeFile(String bitmapFile, int requiredWidth, int requiredHeight, boolean quickAndDirty)
{
try
{
//Decode image size
BitmapFactory.Options bitmapSizeOptions = new BitmapFactory.Options();
bitmapSizeOptions.inJustDecodeBounds = true;
BitmapFactory.decodeStream(new FileInputStream(bitmapFile), null, bitmapSizeOptions);
// load image using inSampleSize adapted to required image size
BitmapFactory.Options bitmapDecodeOptions = new BitmapFactory.Options();
bitmapDecodeOptions.inTempStorage = new byte[16 * 1024];
bitmapDecodeOptions.inSampleSize = computeInSampleSize(bitmapSizeOptions, requiredWidth, requiredHeight, false);
bitmapDecodeOptions.inPurgeable = true;
bitmapDecodeOptions.inDither = !quickAndDirty;
bitmapDecodeOptions.inPreferredConfig = quickAndDirty ? Bitmap.Config.RGB_565 : Bitmap.Config.ARGB_8888;
Bitmap decodedBitmap = BitmapFactory.decodeStream(new FileInputStream(bitmapFile), null, bitmapDecodeOptions);
// scale bitmap to mathc required size (and keep aspect ratio)
float srcWidth = (float) bitmapDecodeOptions.outWidth;
float srcHeight = (float) bitmapDecodeOptions.outHeight;
float dstWidth = (float) requiredWidth;
float dstHeight = (float) requiredHeight;
float srcAspectRatio = srcWidth / srcHeight;
float dstAspectRatio = dstWidth / dstHeight;
// recycleDecodedBitmap is used to know if we must recycle intermediary 'decodedBitmap'
// (DO NOT recycle it right away: wait for end of bitmap manipulation process to avoid
// java.lang.RuntimeException: Canvas: trying to use a recycled bitmap android.graphics.Bitmap@416ee7d8
// I do not excatly understand why, but this way it's OK
boolean recycleDecodedBitmap = false;
Bitmap scaledBitmap = decodedBitmap;
if (srcAspectRatio < dstAspectRatio)
{
scaledBitmap = getScaledBitmap(decodedBitmap, (int) dstWidth, (int) (srcHeight * (dstWidth / srcWidth)));
// will recycle recycleDecodedBitmap
recycleDecodedBitmap = true;
}
else if (srcAspectRatio > dstAspectRatio)
{
scaledBitmap = getScaledBitmap(decodedBitmap, (int) (srcWidth * (dstHeight / srcHeight)), (int) dstHeight);
recycleDecodedBitmap = true;
}
// crop image to match required image size
int scaledBitmapWidth = scaledBitmap.getWidth();
int scaledBitmapHeight = scaledBitmap.getHeight();
Bitmap croppedBitmap = scaledBitmap;
if (scaledBitmapWidth > requiredWidth)
{
int xOffset = (scaledBitmapWidth - requiredWidth) / 2;
croppedBitmap = Bitmap.createBitmap(scaledBitmap, xOffset, 0, requiredWidth, requiredHeight);
scaledBitmap.recycle();
}
else if (scaledBitmapHeight > requiredHeight)
{
int yOffset = (scaledBitmapHeight - requiredHeight) / 2;
croppedBitmap = Bitmap.createBitmap(scaledBitmap, 0, yOffset, requiredWidth, requiredHeight);
scaledBitmap.recycle();
}
if (recycleDecodedBitmap)
{
decodedBitmap.recycle();
}
decodedBitmap = null;
scaledBitmap = null;
return croppedBitmap;
}
catch (Exception ex)
{
ex.printStackTrace();
}
return null;
}
/**
* compute powerOf2 or exact scale to be used as {@link BitmapFactory.Options#inSampleSize} value (for subSampling)
*
* @param requiredWidth
* @param requiredHeight
* @param powerOf2
* weither we want a power of 2 sclae or not
* @return
*/
public static int computeInSampleSize(BitmapFactory.Options options, int dstWidth, int dstHeight, boolean powerOf2)
{
int inSampleSize = 1;
// Raw height and width of image
final int srcHeight = options.outHeight;
final int srcWidth = options.outWidth;
if (powerOf2)
{
//Find the correct scale value. It should be the power of 2.
int tmpWidth = srcWidth, tmpHeight = srcHeight;
while (true)
{
if (tmpWidth / 2 < dstWidth || tmpHeight / 2 < dstHeight)
break;
tmpWidth /= 2;
tmpHeight /= 2;
inSampleSize *= 2;
}
}
else
{
// Calculate ratios of height and width to requested height and width
final int heightRatio = Math.round((float) srcHeight / (float) dstHeight);
final int widthRatio = Math.round((float) srcWidth / (float) dstWidth);
// Choose the smallest ratio as inSampleSize value, this will guarantee
// a final image with both dimensions larger than or equal to the
// requested height and width.
inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
}
return inSampleSize;
}
public static Bitmap drawableToBitmap(Drawable drawable)
{
if (drawable instanceof BitmapDrawable)
{
return ((BitmapDrawable) drawable).getBitmap();
}
Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
drawable.draw(canvas);
return bitmap;
}
public static Bitmap getScaledBitmap(Bitmap bitmap, int newWidth, int newHeight)
{
int width = bitmap.getWidth();
int height = bitmap.getHeight();
float scaleWidth = ((float) newWidth) / width;
float scaleHeight = ((float) newHeight) / height;
// CREATE A MATRIX FOR THE MANIPULATION
Matrix matrix = new Matrix();
// RESIZE THE BIT MAP
matrix.postScale(scaleWidth, scaleHeight);
// RECREATE THE NEW BITMAP
Bitmap resizedBitmap = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, false);
return resizedBitmap;
}
}
I would suggest you to:
If you receive data from a server using xml-based protocol - use SAX parser instead of DOM.
Do not load the whole base64 string in to the memory. Use InputStream to load portion of data in to the byte[] array, decode Base64 from the array and append the result to a cache file via FileOutputStream.
Use options.inJustDecodeBounds option to prevent a full-scale bitmap file loading in to memory. You can evaluate the total amount of memory required and make a decision to scale it down, for example. UPD. I noticed you are using it already.
Keep in mind object references you are holding and passing trough your methods flow. Strong references prevents memory from to be reclaimed by GC.
Following your code: method decodeBase64 holds String input argument parameter in the stack, byte[] decodedBytereference and return BitmapFactory.decodeStream(new FileInputStream(f), null, o2) at the very end. Holding all these objects in the memory at the same time means big pressure on GC and memory allocation in general. As a simplest solution you can null references just after corresponding objects were used (string and byte array), so GC will be able to free up them.
37
Try With this pseudo code: Let me know if you have any questions
Bitmap bmp = (Bitmap) data.getExtras().get("data");
img.setImageBitmap(bmp);
btnadd.requestFocus();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.JPEG, 100, baos);
byte[] b = baos.toByteArray();
encodedImageString = Base64.encodeToString(b, Base64.DEFAULT);
byte[] bytarray = Base64.decode(encodedImageString, Base64.DEFAULT);
Bitmap bmimage = BitmapFactory.decodeByteArray(bytarray, 0,
bytarray.length);
Just increase the heap size of your application in manifest file.
android:largeHeap="true"
eg:
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/Theme.AppTheme"
android:largeHeap="true" >
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