在我的应用程序中,我想从图库中选择图像并在 ImageView 中显示图像,还想将图像移动到新文件夹。我在 ImageView 中得到了图像,但它没有移动到另一个文件夹。谁能帮我? 我使用下面的代码来实现这个....
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Intent intent = new Intent(Intent.ACTION_PICK);
intent.setType("image/*");
startActivityForResult(intent, 1);
}
});
在onActivityResult中
@Override
protected 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 };
System.out.println("File Path Column "+filePathColumn);
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
System.out.println("Column Index "+columnIndex);
picturePath = cursor.getString(columnIndex);
cursor.close();
//imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
BitmapFactory.Options options=new BitmapFactory.Options();
options.inSampleSize = 3;
Bitmap preview_bitmap=BitmapFactory.decodeFile(picturePath,options);
System.out.println("Image patha in Messaging "+picturePath);
imageView.setImageBitmap(preview_bitmap);
differentpic.setText("Click on Upload if you wish to solve a different pic");
differentpic.setPadding(0, 0, 0, 30);
OutputStream out;
File direct = new File(Environment.getExternalStorageDirectory()
+ "/Solve");
if (!direct.exists()) {
direct.mkdirs();
}
File file = new File(Environment.getExternalStorageDirectory()+ "/Solve"+String.valueOf(System.currentTimeMillis())+"jpg");
ByteArrayOutputStream stream = new ByteArrayOutputStream();
try {
file.createNewFile();
out = new FileOutputStream(file);
//Bitmap bmp = intent.getExtras().get("data");
//ByteArrayOutputStream stream = new ByteArrayOutputStream();
int bytes = preview_bitmap.getByteCount();
//or we can calculate bytes this way. Use a different value than 4 if you don't use 32bit images.
//int bytes = b.getWidth()*b.getHeight()*4;
ByteBuffer buffer = ByteBuffer.allocate(bytes); //Create a new buffer
preview_bitmap.copyPixelsToBuffer(buffer); //Move the byte data to the buffer
byte[] array = buffer.array();
out.write(array);
out.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// TODO Auto-generated catch block
}
}
我做错了什么?
提前致谢
最佳答案
如果您同时拥有文件 sourceFile 和 destinationFile 的路径,则可以使用以下代码复制文件。
/**
* copies content from source file to destination file
*
* @param sourceFile
* @param destFile
* @throws IOException
*/
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();
}
}
关于android - 在图库中将图像从一个文件夹复制到另一个文件夹,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/21496894/