[英]how to get image from gallery
I'm trying to get image from the gallery of my device ... I'm having a dialog that has a button that initializes the gallery after the user chooses a photo the path of it should be returned ... 我正在尝试从设备的图库中获取图像...我有一个对话框,该对话框带有一个按钮,可在用户选择照片后初始化图库,并应返回其路径...
but the path is returned as null 但路径返回为空
that's how I do it - 我就是这样的-
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(
Intent.createChooser(intent, "Select Picture"),
SELECT_PICTURE);
In my onActivityResult
- 在我的onActivityResult
-
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == Activity.RESULT_OK) {
if (requestCode == SELECT_PICTURE) {
Uri selectedImageUri = data.getData();
photo_path = getPath(selectedImageUri);
// photo_path=selectedImageUri.getPath();
Globals.galleryFlag = true;
DialogFragment pindiDialogFragment = new PinPhotoDialogFragment();
pindiDialogFragment.show(getFragmentManager(), "pin photo");
dismiss();
}
}
}
And that's my getPath
function - 那就是我的getPath
函数-
public String getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.BUCKET_DISPLAY_NAME,
MediaStore.Images.Media.DATA };
Cursor cursor = getActivity.getContentResolver().query(uri,
projection, null, null, null);
int column_index = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
Few months ago I faced a similar situation. 几个月前,我遇到了类似的情况。 You cannot assume that the Uri returned by the media picker will correspond to a local file , so the best approach is to use a ContentResolver
to treat the picture as a stream. 您不能假设媒体选择器返回的Uri将对应于本地文件,因此最好的方法是使用ContentResolver
将图片视为流。
First of all open the gallery activity with some request code (0 for this example) 首先,打开带有一些请求代码的图库活动(此示例为0)
Intent i = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.INTERNAL_CONTENT_URI);
startActivityForResult(i, 0);
Then override the onActivityResult
method to get the bitmap from gallery. 然后重写onActivityResult
方法以从图库中获取位图。
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 0 && resultCode == RESULT_OK && null != data) { // we have bitmap from filesystem!
Uri selectedImage = data.getData();
InputStream inputStream = null;
if (ContentResolver.SCHEME_CONTENT.equals(selectedImage.getScheme())) {
try {
inputStream = this.getContentResolver().openInputStream(selectedImage);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
} else {
if (ContentResolver.SCHEME_FILE.equals(selectedImage.getScheme())) {
try {
inputStream = new FileInputStream(selectedImage.getPath());
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
}
Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
rpView.setReportPicture(bitmap,false);
}
Call intent as below: 呼叫意图如下:
Intent i = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, RESULT_LOAD_IMAGE);
Correct OnActivityResult as below: 更正如下所示的OnActivityResult:
@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 };
Cursor cursor = getContentResolver().query(selectedImage,filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
ImageView imageView = (ImageView) findViewById(R.id.imgView);
imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
}
}
Source: Android get image from gallery into ImageView 资料来源: Android将图片从图库导入ImageView
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.