java - imagen - imageview to base64 android

OutOfMemoryError durante la decodificación y codificación de la Cadena Base64 en Bitmap

Question

Estoy intentando decode y encode una imagen de Bitmap . En algunos dispositivos funciona perfectamente, mientras que en otros no. Estoy cargando Base64 String en el servidor y obteniendo Base64 String del servidor. He encontrado varias soluciones pero todavía no puedo resolver mi problema. Aquí está mi código:

Codificación:

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 = "";
}
}
}

Descodificación:

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;
}

Pila de errores:

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)

También estoy recibiendo este error en algunos dispositivos:

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)

Las soluciones que ya he probado son:

• Extraño problema de memoria al cargar una imagen en un objeto Bitmap

• ¿Cómo convertir una imagen en una cadena Base64?

• Problema de falta de memoria ImageView problema

• Error de falta de memoria en Android

• Codificación de imágenes y decodificación usando Base64 en la aplicación de Android

Answer 1

Al mostrar Bitmap en ImageView desde un archivo, primero BitmapHelper.decodeFile(picturePath, 200, 200, true) con la ayuda de BitmapHelper.decodeFile(picturePath, 200, 200, true) esto devolverá Bitmap comprimido para que, al codificar este Bitmap, puedas manejar imágenes de alta resolución e imágenes de gran tamaño. hasta 100 MB de archivo.

Después de descodificar el archivo, ImageView su ImageView y obtenga el formato de la Cadena Base64 sobre la imagen comprimida utilizando la clase BitmapHelper ; obtener Bitmap de Bitmap de su ImageView (es decir, ya ha sido comprimido) y utilizar ImageBase64.encodeTobase64(bitmap) esto comprimirá nuevamente el archivo y hará que la excepción OutOfMemory maneje mientras se Encoding un Bitmap .

Para la decoding primero escriba su Base64String en el archivo en la memoria de su dispositivo. Luego, lee Bytes en fragmentos y decodifica ese ByteArray con esto, tendrás tu mapa de bits en tu memoria. Después de escalar este mapa de bits usando el método decodeFile() , entonces habrá comprimido Bitmap desde Base64String

He buscado en varios blogs y publicaciones y de ellos he tomado el mejor código adecuado y los he combinado en uno para hacerlo más confiable. Pruebe el siguiente código para hacer que la encoding y la decoding más rápidas con la administración de meory.

Para decodificar Base64String

Bitmap bitmap = ImageBase64.decodeBase64(base64ImageStr,MainActivity.this);
imageView.setImageBitmap(bitmap);
bitmap = null;
System.gc();

Para codificar Bitmap Pruebe esto:

imageView.setImageBitmap(BitmapHelper.decodeFile(picturePath, 200, 200, true));
Bitmap bitmap = ((BitmapDrawable)imageView.getDrawable()).getBitmap();
base64ImageStr = ImageBase64.encodeTobase64(bitmap);

Pruebe este código para 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;
}
}

Agregue esta clase para manejar imágenes pesadas

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;
}
}

Answer 2

Como Greenapps sugirió, sería mejor evitar el uso de Bitmap y BitmapFactory para TRANSMITIR el archivo:

FileInputStream fis = new FileInputStream(imageFile);
byte[] byteArray = inputStreamToByteArray(fis);
String base64ImageSend = Base64.encodeToString(byteArray, Base64.NO_WRAP);

dónde:

/**
* Convert an InputStream object into a byte array
* @param inputStream The InputStream to convert
* @return The byte[] representing the converted InputStream or null if the inputStream is null
*/
public static byte[] inputStreamToByteArray(InputStream inputStream) throws IOException {
if(inputStream==null) {
return null;
}
ByteArrayOutputStream byteBuffer = new ByteArrayOutputStream();
int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
int len = 0;
while ((len = inputStream.read(buffer)) != -1) {
byteBuffer.write(buffer, 0, len);
}
return byteBuffer.toByteArray();
}

En realidad, el problema de OutOfMemory, según lo declarado por Kai, se debe al hecho de que está decodificando una resolución completa y una imagen de alta calidad. La mejor manera de evitar esto es reducir la resolución de su imagen:

/**
* Decode a file, representing an image, into a bitmap, trying to scale the original image if required
* @param context The application context
* @param file The image file
* @param requestedWidth The requested width
* @param requestedHeight The requested height
* @return The decoded bitmap or null if it is not possible to decode the file parameter
*/
public static Bitmap decodeImageFileIntoMutableBitmap(Context context, File file, int requestedWidth, int requestedHeight) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true; // just compute size, don''t create bitmap
BitmapFactory.decodeFile(file.getAbsolutePath(), options);
float sampleSize = computeImageScaleCoefficient(options, requestedWidth, requestedHeight);
if (sampleSize == -1) {
return null;
}
else if (sampleSize <= 1) {
options.inSampleSize = 1;
}
else {
options.inSampleSize = (int) sampleSize;
}
options.inJustDecodeBounds = false; // compute size and create bitmap
/*it is possible to reduce the memory when decoding through skipping ARGB_8888 and using RGB_565 instead and inDither to true to preserve image quality.*/
//options.inPreferredConfig = Bitmap.Config.RGB_565;
//options.inDither = true;
Bitmap bitmap = BitmapFactory.decodeFile(file.getAbsolutePath(), options);
if (bitmap == null) {
return null;
}
return bitmap;
}
/**
* Find the sample coefficient <code><b>s<sub>k</sub></b>=2<sup>k</sup></code>, with <code>k &isin &#8469;</code>, such that
* <code>min<sub>k</sub>(requestedWidth-options.outWidth&times;<b>s<sub>k</sub></b>)&gt;0</code>
* <code>&&</code>
* <code>min<sub>k</sub>(requestedHeight-options.outHeight&times;<b>s<sub>k</sub></b>)&gt;0</code>
* @param options The BitmapFactory.Options instance of the original image user wants to scale
* @param requestedWidth The requested width
* @param requestedHeight The requested height
* @return -1 if if there is an error trying to decode the image
* or the sample coefficient <code><b>s<sub>k</sub></b></code>,
* &gt;1 if the image needs to be down-sampled,
* &lt;1 if the image needs to be up-sampled
*/
public static float computeImageScaleCoefficient(BitmapFactory.Options options, int requestedWidth, int requestedHeight) {
float sampleCoefficient = 1;
int imageWidth = options.outWidth;
int imageHeight = options.outHeight;
if (imageWidth == -1 || imageHeight == -1) {
return -1;
}
double outWidth = imageWidth;
double outHeight = imageHeight;
if ((outWidth > requestedWidth) || (outHeight > requestedHeight)) {
while ((outWidth > requestedWidth) || (outHeight > requestedHeight)) {
outWidth = Math.floor(outWidth/2.0);
outHeight = Math.floor(outHeight/2.0);
sampleCoefficient *= 2.0;
}
}
else {
while ((outWidth < requestedWidth) && (outHeight < requestedHeight)) {
outWidth *= 2;
outHeight *= 2;
if ((outWidth <= requestedWidth) && (outHeight <= requestedHeight)) {
sampleCoefficient /= 2.0;
}
}
}
return sampleCoefficient;
}

Answer 3

Pruebe con este pseudo código: hágamelo saber si tiene alguna pregunta

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);

Answer 4

Puedes probar esto, debería resolver tu problema.

Básicamente primero guarda los datos en un archivo, usando un buffer para evitar problemas de memoria. Después de eso, verificamos y cambiamos el tamaño del archivo, cargando directamente un Bitmap redimensionado, nuevamente para evitar problemas de memoria.

Por lo que puedo suponer, está obteniendo la cadena codificada de un servidor ... por lo que puede administrar su código para escribir directamente en el archivo.

Escribir los datos en el archivo:

private Bitmap getBitmapThumbnail(String base64StringReceive) {
byte[] data = Base64.decode(base64StringReceive, Base64.DEFAULT);
File file = new File(getFilesDir(), "testFile");
try {
BufferedOutputStream bos = new BufferedOutputStream(openFileOutput("testFile", Context.MODE_PRIVATE),1024);
bos.write(data);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return getThumbFromFile(file, false);
}

Creando la miniatura desde el archivo de imagen:

private Bitmap getThumbFromFile(File file) {
Bitmap tempImage = null;
try {
tempImage = decodeSampledBitmapFromFile(file.getAbsolutePath(), 50, 50); // this is in pixels - use your desired size
return ThumbnailUtils.extractThumbnail(tempImage, 50, 50);
} finally {
if (tempImage != null) {
tempImage.recycle();
}
}
}

Cargando solo un mapa de bits redimensionado:

private Bitmap decodeSampledBitmapFromFile(String filePath, int reqWidth, int reqHeight) {
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(filePath, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeFile(filePath, options);
}

Calculando el valor de muestreo proporcionado por Google, puede encontrar sus tutoriales:

private int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
final int halfHeight = height / 2;
final int halfWidth = width / 2;
// Calculate the largest inSampleSize value that is a power of 2 and keeps both
// height and width larger than the requested height and width.
while ((halfHeight / inSampleSize) > reqHeight &&
(halfWidth / inSampleSize) > reqWidth) {
inSampleSize *= 2;
}
}
return inSampleSize;
}

Answer 5

Simplemente aumente el tamaño de almacenamiento dinámico de su aplicación en el archivo de manifiesto.

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" >

Answer 6

Yo sugeriría que:

1. Si recibe datos de un servidor utilizando un protocolo basado en xml, use el analizador SAX en lugar de DOM.

2. No cargue toda la cadena base64 en la memoria. Se usa InputStreampara cargar una porción de datos en la byte[]matriz, decodificar Base64 de la matriz y anexar el resultado a un archivo de caché a través de FileOutputStream.

3. Use la opción options.inJustDecodeBounds para evitar que un archivo de mapa de bits de escala completa se cargue en la memoria. Puede evaluar la cantidad total de memoria requerida y tomar una decisión para reducirla, por ejemplo. UPD . Me di cuenta de que ya lo estás usando.

4. Tenga en cuenta referencias de objetos que está reteniendo y pasando a través de su flujo de métodos. Las referencias fuertes evitan que GC recupere memoria.

Siguiendo su código: el método decodeBase64contiene un String inputparámetro de argumento en la pila, byte[] decodedBytereferencia y retorno BitmapFactory.decodeStream(new FileInputStream(f), null, o2)al final. Mantener todos estos objetos en la memoria al mismo tiempo significa una gran presión en la asignación de GC y memoria en general. Como solución más simple puede hacer nullreferencias justo después de que se hayan utilizado los objetos correspondientes (cadena y matriz de bytes), por lo que GC podrá liberarlos.

Answer 7

No está codificando base64 una instancia de mapa de bits (como sugiere en su publicación e incluso en el tema) sino una matriz de bytes benString imageEncoded = Base64.encodeToString(b, Base64.DEFAULT); . La matriz de bytes ''b'' contiene los bytes de lo que sería el contenido de un archivo .jpg si escribes estos bytes en el archivo.

Lo que tienes que hacer es colocar los contenidos del archivo .jpg que deseas subir directamente en una matriz de bytes. Luego codifica esa matriz.

Google para android put file content in byte array. El código ha sido publicado muchas veces en este sitio