我正在尝试从图库中获取图像。
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select picture"), resultCode );
从这个活动返回后，我有一个数据，其中包含 Uri。看起来像：
content://media/external/images/1
如何将此路径转换为真实路径（就像' /sdcard/image.png'）？
谢谢
这就是我所做的：
Uri selectedImageURI = data.getData();
imageFile = new File(getRealPathFromURI(selectedImageURI));
和：
private String getRealPathFromURI(Uri contentURI) {
String result;
Cursor cursor = getContentResolver().query(contentURI, null, null, null, null);
if (cursor == null) { // Source is Dropbox or other similar local file path
result = contentURI.getPath();
} else {
cursor.moveToFirst();
int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
result = cursor.getString(idx);
cursor.close();
}
return result;
}
注意：managedQuery()方法已弃用，所以我没有使用它。
最后编辑：改进。我们应该关闭光标！！
你真的有必要获得物理路径吗？
例如，ImageView.setImageURI()允许ContentResolver.openInputStream()您在不知道文件真实路径的情况下访问文件的内容。
@Rene Juuse - 以上评论...感谢此链接！
. 获取真实路径的代码从一个 SDK 到另一个 SDK 有点不同，因此下面我们提供了三种处理不同 SDK 的方法。
getRealPathFromURI_API19()：返回 API 19（或更高版本但未测试）的真实路径 getRealPathFromURI_API11to18()：返回 API 11 到 API 18 的真实路径 getRealPathFromURI_below11()：返回 API 11 以下的真实路径
public class RealPathUtil {
@SuppressLint("NewApi")
public static String getRealPathFromURI_API19(Context context, Uri uri){
String filePath = "";
String wholeID = DocumentsContract.getDocumentId(uri);
// Split at colon, use second item in the array
String id = wholeID.split(":")[1];
String[] column = { MediaStore.Images.Media.DATA };
// where id is equal to
String sel = MediaStore.Images.Media._ID + "=?";
Cursor cursor = context.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
column, sel, new String[]{ id }, null);
int columnIndex = cursor.getColumnIndex(column[0]);
if (cursor.moveToFirst()) {
filePath = cursor.getString(columnIndex);
}
cursor.close();
return filePath;
}
@SuppressLint("NewApi")
public static String getRealPathFromURI_API11to18(Context context, Uri contentUri) {
String[] proj = { MediaStore.Images.Media.DATA };
String result = null;
CursorLoader cursorLoader = new CursorLoader(
context,
contentUri, proj, null, null, null);
Cursor cursor = cursorLoader.loadInBackground();
if(cursor != null){
int column_index =
cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
result = cursor.getString(column_index);
}
return result;
}
public static String getRealPathFromURI_BelowAPI11(Context context, Uri contentUri){
String[] proj = { MediaStore.Images.Media.DATA };
Cursor cursor = context.getContentResolver().query(contentUri, proj, null, null, null);
int column_index
= cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
字体：http ://hmkcode.com/android-display-selected-image-and-its-real-path/
2016 年 3 月更新
为了解决图像路径的所有问题，我尝试创建一个自定义画廊作为 facebook 和其他应用程序。这是因为您可以只使用本地文件（真实文件，而不是虚拟或临时文件），我解决了这个库的所有问题。
https://github.com/nohana/Laevatein （这个库是从相机拍照或从画廊中选择，如果你从画廊中选择，他有一个带相册的抽屉，只显示本地文件）
注意这是@user3516549 答案的改进，我已经在带有Android 6.0.1 的Moto G3 上对其进行了检查。
我遇到了这个问题，所以我尝试了@user3516549 的答案，但在某些情况下它无法正常工作。我发现在 Android 6.0（或更高版本）中，当我们启动图库图像选择意图时，当用户从此列表中选择图像时，将打开一个屏幕显示最近的图像，我们将获得 uri
content://com.android.providers.media.documents/document/image%3A52530
而如果用户从滑动抽屉而不是最近选择画廊，那么我们将得到 uri
content://media/external/images/media/52530
所以我已经处理好了getRealPathFromURI_API19()
public static String getRealPathFromURI_API19(Context context, Uri uri) {
String filePath = "";
if (uri.getHost().contains("com.android.providers.media")) {
// Image pick from recent
String wholeID = DocumentsContract.getDocumentId(uri);
// Split at colon, use second item in the array
String id = wholeID.split(":")[1];
String[] column = {MediaStore.Images.Media.DATA};
// where id is equal to
String sel = MediaStore.Images.Media._ID + "=?";
Cursor cursor = context.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
column, sel, new String[]{id}, null);
int columnIndex = cursor.getColumnIndex(column[0]);
if (cursor.moveToFirst()) {
filePath = cursor.getString(columnIndex);
}
cursor.close();
return filePath;
} else {
// image pick from gallery
return getRealPathFromURI_BelowAPI11(context,uri)
}
}
EDIT1：如果您尝试在更高版本的外部 sdcard 中获取文件的图像路径，请检查我的问题
EDIT2 这是处理虚拟文件和主机的完整代码，而不是com.android.providers我测试过的这个方法content://com.adobe.scan.android.documents/document/
编辑： 在此处使用此解决方案：https : //stackoverflow.com/a/20559175/2033223 完美！
首先，感谢您的解决方案@luizfelipetx
我稍微改变了你的解决方案。这对我有用：
public static String getRealPathFromDocumentUri(Context context, Uri uri){
String filePath = "";
Pattern p = Pattern.compile("(\\d+)$");
Matcher m = p.matcher(uri.toString());
if (!m.find()) {
Log.e(ImageConverter.class.getSimpleName(), "ID for requested image not found: " + uri.toString());
return filePath;
}
String imgId = m.group();
String[] column = { MediaStore.Images.Media.DATA };
String sel = MediaStore.Images.Media._ID + "=?";
Cursor cursor = context.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
column, sel, new String[]{ imgId }, null);
int columnIndex = cursor.getColumnIndex(column[0]);
if (cursor.moveToFirst()) {
filePath = cursor.getString(columnIndex);
}
cursor.close();
return filePath;
}
注意：所以我们得到了文件和图像，这取决于图像是来自“最近”、“画廊”还是其他。所以我在查找之前先提取图像ID。
一种简单且最好的方法将文件复制到真实路径，然后获取他们的路径我检查了android API-16 到 API-30上的 10 台设备工作正常。
@Nullable
public static String createCopyAndReturnRealPath(
@NonNull Context context, @NonNull Uri uri) {
final ContentResolver contentResolver = context.getContentResolver();
if (contentResolver == null)
return null;
// Create file path inside app's data dir
String filePath = context.getApplicationInfo().dataDir + File.separator + "temp_file";
File file = new File(filePath);
try {
InputStream inputStream = contentResolver.openInputStream(uri);
if (inputStream == null)
return null;
OutputStream outputStream = new FileOutputStream(file);
byte[] buf = new byte[1024];
int len;
while ((len = inputStream.read(buf)) > 0)
outputStream.write(buf, 0, len);
outputStream.close();
inputStream.close();
} catch (IOException ignore) {
return null;
}
return file.getAbsolutePath();
}
Hii 这是我从相机或画廊拍摄图像的完整代码
//我的变量声明
protected static final int CAMERA_REQUEST = 0;
protected static final int GALLERY_REQUEST = 1;
Bitmap bitmap;
Uri uri;
Intent picIntent = null;
//点击
if (v.getId()==R.id.image_id){
startDilog();
}
//方法体
private void startDilog() {
AlertDialog.Builder myAlertDilog = new AlertDialog.Builder(yourActivity.this);
myAlertDilog.setTitle("Upload picture option..");
myAlertDilog.setMessage("Where to upload picture????");
myAlertDilog.setPositiveButton("Gallery", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
picIntent = new Intent(Intent.ACTION_GET_CONTENT,null);
picIntent.setType("image/*");
picIntent.putExtra("return_data",true);
startActivityForResult(picIntent,GALLERY_REQUEST);
}
});
myAlertDilog.setNegativeButton("Camera", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
picIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(picIntent,CAMERA_REQUEST);
}
});
myAlertDilog.show();
}
//还有其他的东西
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode==GALLERY_REQUEST){
if (resultCode==RESULT_OK){
if (data!=null) {
uri = data.getData();
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
try {
BitmapFactory.decodeStream(getContentResolver().openInputStream(uri), null, options);
options.inSampleSize = calculateInSampleSize(options, 100, 100);
options.inJustDecodeBounds = false;
Bitmap image = BitmapFactory.decodeStream(getContentResolver().openInputStream(uri), null, options);
imageofpic.setImageBitmap(image);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}else {
Toast.makeText(getApplicationContext(), "Cancelled",
Toast.LENGTH_SHORT).show();
}
}else if (resultCode == RESULT_CANCELED) {
Toast.makeText(getApplicationContext(), "Cancelled",
Toast.LENGTH_SHORT).show();
}
}else if (requestCode == CAMERA_REQUEST) {
if (resultCode == RESULT_OK) {
if (data.hasExtra("data")) {
bitmap = (Bitmap) data.getExtras().get("data");
uri = getImageUri(YourActivity.this,bitmap);
File finalFile = new File(getRealPathFromUri(uri));
imageofpic.setImageBitmap(bitmap);
} else if (data.getExtras() == null) {
Toast.makeText(getApplicationContext(),
"No extras to retrieve!", Toast.LENGTH_SHORT)
.show();
BitmapDrawable thumbnail = new BitmapDrawable(
getResources(), data.getData().getPath());
pet_pic.setImageDrawable(thumbnail);
}
} else if (resultCode == RESULT_CANCELED) {
Toast.makeText(getApplicationContext(), "Cancelled",
Toast.LENGTH_SHORT).show();
}
}
}
private String getRealPathFromUri(Uri tempUri) {
Cursor cursor = null;
try {
String[] proj = { MediaStore.Images.Media.DATA };
cursor = this.getContentResolver().query(tempUri, proj, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
} finally {
if (cursor != null) {
cursor.close();
}
}
}
public static int calculateInSampleSize(
BitmapFactory.Options options, int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
final int halfHeight = height / 2;
final int halfWidth = width / 2;
// Calculate the largest inSampleSize value that is a power of 2 and keeps both
// height and width larger than the requested height and width.
while ((halfHeight / inSampleSize) > reqHeight
&& (halfWidth / inSampleSize) > reqWidth) {
inSampleSize *= 2;
}
}
return inSampleSize;
}
private Uri getImageUri(YourActivity youractivity, Bitmap bitmap) {
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, byteArrayOutputStream);
String path = MediaStore.Images.Media.insertImage(youractivity.getContentResolver(), bitmap, "Title", null);
return Uri.parse(path);
}
这帮助我从图库中获取 uri 并转换为文件以进行分段上传
File file = FileUtils.getFile(this, fileUri);