我试图通过谷歌驱动器使用意图获取图像，我可以使用以下代码从谷歌驱动器获取图像。当下载大位图时，我出现了超出错误的问题。但是我从谷歌驱动器uri解码后我已经缩放了位图，但我得到了超出错误的例外！。帮助我，我怎么能解决这个问题？
private Bitmap getImage(Uri mUri)
{
String imgPath = null;
boolean isImageFromGoogleDrive = false;
Boolean isKitKat = false;
Uri uri = mUri;
Bitmap bitmap = null;
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
isKitKat = true;
}
if (isKitKat && DocumentsContract.isDocumentUri(PhotoEditor.this, uri)) {
if ("com.android.externalstorage.documents".equals(uri.getAuthority())) {
String docId = DocumentsContract.getDocumentId(uri);
String[] split = docId.split(":");
String type = split[0];
if ("primary".equalsIgnoreCase(type)) {
imgPath = Environment.getExternalStorageDirectory() + "/" + split[1];
}
else {
Pattern DIR_SEPORATOR = Pattern.compile("/");
Set<String> rv = new HashSet<>();
String rawExternalStorage = System.getenv("EXTERNAL_STORAGE");
String rawSecondaryStoragesStr = System.getenv("SECONDARY_STORAGE");
String rawEmulatedStorageTarget = System.getenv("EMULATED_STORAGE_TARGET");
if(TextUtils.isEmpty(rawEmulatedStorageTarget))
{
if(TextUtils.isEmpty(rawExternalStorage))
{
rv.add("/storage/sdcard0");
}
else
{
rv.add(rawExternalStorage);
}
}
else
{
String rawUserId;
if(Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1)
{
rawUserId = "";
}
else
{
String path = Environment.getExternalStorageDirectory().getAbsolutePath();
String[] folders = DIR_SEPORATOR.split(path);
String lastFolder = folders[folders.length - 1];
boolean isDigit = false;
try
{
Integer.valueOf(lastFolder);
isDigit = true;
}
catch(NumberFormatException ignored)
{
}
rawUserId = isDigit ? lastFolder : "";
}
if(TextUtils.isEmpty(rawUserId))
{
rv.add(rawEmulatedStorageTarget);
}
else
{
rv.add(rawEmulatedStorageTarget + File.separator + rawUserId);
}
}
if(!TextUtils.isEmpty(rawSecondaryStoragesStr))
{
String[] rawSecondaryStorages = rawSecondaryStoragesStr.split(File.pathSeparator);
Collections.addAll(rv, rawSecondaryStorages);
}
String[] temp = rv.toArray(new String[rv.size()]);
for (int i = 0; i < temp.length; i++) {
File tempf = new File(temp[i] + "/" + split[1]);
if(tempf.exists()) {
imgPath = temp[i] + "/" + split[1];
}
}
}
}
else if ("com.android.providers.downloads.documents".equals(uri.getAuthority())) {
String id = DocumentsContract.getDocumentId(uri);
Uri contentUri = ContentUris.withAppendedId( Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
Cursor cursor = null;
String column = "_data";
String[] projection = { column };
try {
cursor = PhotoEditor.this.getContentResolver().query(contentUri, projection, null, null,
null);
if (cursor != null && cursor.moveToFirst()) {
int column_index = cursor.getColumnIndexOrThrow(column);
imgPath = cursor.getString(column_index);
}
} finally {
if (cursor != null)
cursor.close();
}
}
else if("com.android.providers.media.documents".equals(uri.getAuthority())) {
String docId = DocumentsContract.getDocumentId(uri);
String[] split = docId.split(":");
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;
}
String selection = "_id=?";
String[] selectionArgs = new String[]{ split[1] };
Cursor cursor = null;
String column = "_data";
String[] projection = { column };
try {
cursor = PhotoEditor.this.getContentResolver().query(contentUri, projection, selection, selectionArgs, null);
if (cursor != null && cursor.moveToFirst()) {
int column_index = cursor.getColumnIndexOrThrow(column);
imgPath = cursor.getString(column_index);
}
} finally {
if (cursor != null)
cursor.close();
}
}
else if("com.google.android.apps.docs.storage".equals(uri.getAuthority())) {
isImageFromGoogleDrive = true;
Log.d("TAG","Inside Google Drive Flag True");
}
}
else if ("content".equalsIgnoreCase(uri.getScheme())) {
Cursor cursor = null;
String column = "_data";
String[] projection = { column };
try {
cursor = PhotoEditor.this.getContentResolver().query(uri, projection, null, null, null);
if (cursor != null && cursor.moveToFirst()) {
int column_index = cursor.getColumnIndexOrThrow(column);
imgPath = cursor.getString(column_index);
}
}
finally {
if (cursor != null)
cursor.close();
}
}
else if ("file".equalsIgnoreCase(uri.getScheme())) {
imgPath = uri.getPath();
}
if(isImageFromGoogleDrive) {
try {
Log.d("TAG","Inside Google Drive Flag try block");
Bitmap bmp1 = BitmapFactory.decodeStream(getContentResolver().openInputStream(uri));
bitmap = getResizedBitmapForDriveFile(bmp1);
return bitmap;
}
catch (Exception e) {
Log.d("TAG","Inside Google Drive Flag catch block");
e.printStackTrace();
}
}
else {
Log.d("TAG","Not from google drive");
Orientation = Float.valueOf(getImageOrientation(imgPath));
getAspectRatio(imgPath, MaxResolution);
bitmap = getResizedOriginalBitmap(imgPath, Orientation.floatValue());
return bitmap;
}
return bitmap;
}
答案 0 :(得分：0)
要解决android.graphics.BitmapFactory.nativeDecodeByteArray中的java.lang.OutOfMemoryError异常，您应该使用以下代码：
BitmapFactory.Options options=new BitmapFactory.Options();// Create object of bitmapfactory's option method for further option use
options.inPurgeable = true; // inPurgeable is used to free up memory while required
Bitmap songImage1 = BitmapFactory.decodeByteArray(thumbnail,0, thumbnail.length,options);//Decode image, "thumbnail" is the object of image file
Bitmap songImage = Bitmap.createScaledBitmap(songImage1, 50 , 50 , true);// convert decoded bitmap into well scalled Bitmap format.
imageview.SetImageDrawable(songImage);