我想从图库中选择图像并将其复制到 SDCard 中的其他文件夹中。
从图库中选择图像的代码
Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
photoPickerIntent.setType("image/*");
startActivityForResult(photoPickerIntent, REQUEST_CODE_CHOOSE_PICTURE_FROM_GALLARY);
我得到
content://media/external/images/media/681我要复制图片，
形式
path ="content://media/external/images/media/681给
path = "file:///mnt/sdcard/sharedresources/如何做到这一点？
感谢所有......工作代码在这里..
private OnClickListener photoAlbumListener = new OnClickListener(){
@Override
public void onClick(View arg0) {
Intent photoPickerIntent = new Intent(Intent.ACTION_GET_CONTENT);
imagepath = Environment.getExternalStorageDirectory()+"/sharedresources/"+HelperFunctions.getDateTimeForFileName()+".png";
uriImagePath = Uri.fromFile(new File(imagepath));
photoPickerIntent.setType("image/*");
photoPickerIntent.putExtra(MediaStore.EXTRA_OUTPUT,uriImagePath);
photoPickerIntent.putExtra("outputFormat",Bitmap.CompressFormat.PNG.name());
photoPickerIntent.putExtra("return-data", true);
startActivityForResult(photoPickerIntent, REQUEST_CODE_CHOOSE_PICTURE_FROM_GALLARY);
}
};
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
switch(requestCode){
case 22:
Log.d("onActivityResult","uriImagePath Gallary :"+data.getData().toString());
Intent intentGallary = new Intent(mContext, ShareInfoActivity.class);
intentGallary.putExtra(IMAGE_DATA, uriImagePath);
intentGallary.putExtra(TYPE, "photo");
File f = new File(imagepath);
if (!f.exists())
{
try {
f.createNewFile();
copyFile(new File(getRealPathFromURI(data.getData())), f);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
startActivity(intentGallary);
finish();
break;
}
}
}
private void copyFile(File sourceFile, File destFile) throws IOException {
if (!sourceFile.exists()) {
return;
}
FileChannel source = null;
FileChannel destination = null;
source = new FileInputStream(sourceFile).getChannel();
destination = new FileOutputStream(destFile).getChannel();
if (destination != null && source != null) {
destination.transferFrom(source, 0, source.size());
}
if (source != null) {
source.close();
}
if (destination != null) {
destination.close();
}
}
private String getRealPathFromURI(Uri contentUri) {
String[] proj = { MediaStore.Video.Media.DATA };
Cursor cursor = managedQuery(contentUri, proj, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
OutputStream out;
String root = Environment.getExternalStorageDirectory().getAbsolutePath()+"/";
File createDir = new File(root+"Folder Name"+File.separator);
if(!createDir.exists()) {
createDir.mkdir();
}
File file = new File(root + "Folder Name" + File.separator +"Name of File");
file.createNewFile();
out = new FileOutputStream(file);
out.write(data);
out.close();
希望对你有帮助
一个解决方案可以，
1) 从所选文件的 inputStream 中读取字节。
我得到“content://media/external/images/media/681”这个URI onActivityResult。 你可以通过查询你得到的这个 Uri 来获取文件名。得到它的输入流。将其读入 byte[].
给你/
Uri u = Uri.Parse("content://media/external/images/media/681");
游标cursor = contentResolver.query(u, null, null, null, null); 有一个列名“_data”，它将返回文件名，从文件名你可以创建输入流，
你现在可以阅读这个输入流了
byte data=new byte[fis.available()];
fis.read(data);
所以你有数据（字节数组）和图像字节
2) 在sdcard上创建一个文件，并用第一步中的byte[]写入。
File file=new File(fileOnSD.getAbsolutePath() +"your foldername", fileName);
FileOutputStream fout=new FileOutputStream(file, false);
fout.write(data);
作为查询方法中已有的文件名，请在此处使用相同的名称。
正在阅读这个链接，他们在这里谈论用Java复制文件的四种方法，
与安卓也很相关。
尽管作者得出结论，使用@Prashant 的回答中使用的“频道”是最好的方式，您甚至可以探索其他方式。
（我试过前两个，都找到了）
尽管我对@AAnkit 的答案投了赞成票，但我借用并继续修改了一些项目。他提到使用
Cursor我认为这比投票最多的答案更简单。
String mCurrentPhotoPath = "";
private File createImageFile() throws IOException {
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
mCurrentPhotoPath = image.getAbsolutePath();
return image;
}
/*Then I proceed to select from gallery and when its done selecting it calls back the onActivityResult where I do some magic*/
private void snapOrSelectPicture() {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException ex) {
ex.printStackTrace();
}
if (photoFile != null) {
Uri photoURI = FileProvider.getUriForFile(this,
"com.example.android.fileprovider",
photoFile);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
startActivityForResult(Intent.createChooser(takePictureIntent, "SELECT FILE"), 1001);
}
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
try {
/*data.getDataString() contains your path="content://media/external/images/media/681 */
Uri u = Uri.parse(data.getDataString());
Cursor cursor = getContentResolver().query(u, null, null, null, null);
cursor.moveToFirst();
File doc = new File(cursor.getString(cursor.getColumnIndex("_data")));
File dnote = new File(mCurrentPhotoPath);
FileOutputStream fout = new FileOutputStream(dnote, false);
fout.write(Files.toByteArray(doc));
} catch (Exception e) {
e.printStackTrace();
}
}
}
您可以使用此功能的内容解析器将图像文件复制到任何其他文件夹目录
fun copyImageFileToMediaStore(
context: Context,
sourceFilePath: String,
destinationFolder: File
) {
val sourceFile = File(sourceFilePath)
val extension = MimeTypeMap.getFileExtensionFromUrl(sourceFilePath)
val mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension)
val fileName = sourceFile.name
val inputStream = FileInputStream(sourceFile)
val resolver: ContentResolver = context.contentResolver
// Check if a file with the same name already exists in the destination folder
val projection = arrayOf(MediaStore.MediaColumns._ID)
val selection =
"${MediaStore.MediaColumns.DISPLAY_NAME} = ? AND ${MediaStore.MediaColumns.RELATIVE_PATH} = ? AND ${MediaStore.MediaColumns.DATA} = ?"
val selectionArgs = arrayOf(
fileName,
"${destinationFolder.path}/",
destinationFolder.absolutePath + File.separator + fileName
)
val cursor = resolver.query(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
projection,
selection,
selectionArgs,
null
)
if (cursor != null && cursor.count > 0) {
// File already exists in the MediaStore, do not insert it again
cursor.close()
return
}
// File does not exist in the MediaStore, insert it
val values = ContentValues().apply {
put(MediaStore.MediaColumns.DISPLAY_NAME, fileName)
put(MediaStore.MediaColumns.MIME_TYPE, mimeType)
put(MediaStore.MediaColumns.RELATIVE_PATH, destinationFolder.parent)
put(
MediaStore.MediaColumns.DATA,
destinationFolder.absolutePath + File.separator + fileName
)
}
var outputStream: FileOutputStream? = null
var uri: Uri? = null
try {
val contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI
uri = resolver.insert(contentUri, values)
if (uri == null) {
throw IOException("Failed to create new MediaStore record.")
}
outputStream = resolver.openOutputStream(uri) as FileOutputStream?
if (outputStream == null) {
throw IOException("Failed to get output stream.")
}
val buffer = ByteArray(4 * 1024)
var read: Int
while (inputStream.read(buffer).also { read = it } != -1) {
outputStream.write(buffer, 0, read)
}
outputStream.flush()
} catch (e: IOException) {
uri?.let { resolver.delete(it, null, null) }
uri = null
} finally {
inputStream.close()
outputStream?.close()
}
}
像这样调用这个函数
val destinationFolder = File("/storage/emulted/0/DCIM/foldername")
val sourceFilePath = "/storage/emulted/0/DCIM/anyOtherFolder/abcd.jpeg"
copyImageFileToMediaStore(requireContext(), sourceFilePath, destinationFolder)