Android 从库中读取位图并将其写入sd卡失败
我想将位图从图库复制到sd卡上的路径 此功能适用于从相机拍摄的照片:Android 从库中读取位图并将其写入sd卡失败,android,bitmap,android-sdcard,android-gallery,android-external-storage,Android,Bitmap,Android Sdcard,Android Gallery,Android External Storage,我想将位图从图库复制到sd卡上的路径 此功能适用于从相机拍摄的照片: public void saveBitmap(Bitmap bitMap, Uri avatarUri) throws Exception{ File file = new File(avatarUri.toString()); // if (file.exists ()) file.delete (); try { OutputStream fOut =
public void saveBitmap(Bitmap bitMap, Uri avatarUri) throws Exception{
File file = new File(avatarUri.toString());
// if (file.exists ()) file.delete ();
try {
OutputStream fOut = new FileOutputStream(file);
if (bitMap.compress(Bitmap.CompressFormat.PNG, 100, fOut)) {
fOut.flush();
fOut.close();
} else {
Log.d("123", "compress file");
}
} catch (Exception e) {
Log.d("123", "File not found file");
}
}
但当我使用以下选项从库中选择图像时:
void getImageFromGallery(Intent data) throws FileNotFoundException {
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = context.getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
Bitmap bitmap = BitmapFactory.decodeFile(picturePath);
avatarBitmap = bitmap;
}
并使用saveBitmap()
方法保存此所选图像,它会捕获一个文件未找到
异常。此方法生成文件夹并返回
saveBitmap()
方法的URI
public Uri generateAvatarImageUri(String patientName) {
Date date = new Date(0);
SimpleDateFormat sdf = new SimpleDateFormat ("yyyyMMddHHmmss");
String filename = sdf.format(date) + patientName;
return Uri.fromFile(new File(getExternalStorageDirectory(), avatarFolderPath+filename+".jpg"));
}
}
有什么帮助吗?最后我找到了原因,因为文件路径问题 这就是我使用的:
Uri uri = ....;
path = uri.toString();
这导致前缀文件://被添加到路径字符串中,如下所示:
file:///storage/...png
希望能帮助一些人