下面是我关于活动结果的代码，在这里我可以在回收视图中设置图像，并且工作正常
if (data != null) {
if (data.getClipData() != null) {
int count = data.getClipData().getItemCount();
int currentItem = 0;
while (currentItem < count) {
Uri imageUri = data.getClipData().getItemAt(currentItem).getUri();
currentItem = currentItem + 1;
Log.d("Uri Selected", imageUri.toString());
try {
arrayList.add(imageUri);
ImageAdapter mAdapter = new ImageAdapter(ImageUpload.this, arrayList);
recycleviewShopImages.setAdapter(mAdapter);
mAdapter.notifyDataSetChanged();
} catch (Exception e) {
Log.e("TAG", "File select error", e);
}
}
} else if (data.getData() != null) {
final Uri uri = data.getData();
Log.i("TAG", "Uri = " + uri.toString());
try {
arrayList.add(uri);
ImageAdapter mAdapter = new ImageAdapter(ImageUpload.this, arrayList);
recycleviewShopImages.setAdapter(mAdapter);
mAdapter.notifyDataSetChanged();
} catch (Exception e) {
Log.e("TAG", "File select error", e);
}
}
}
获取文件路径并将图像发布到服务器的代码
@NonNull
private MultipartBody.Part prepareFilePart(String partName, Uri fileUri) {
// use the FileUtils to get the actual file by uri
File file = FileUtils.getFile(ImageUpload.this, fileUri);
// create RequestBody instance from file
RequestBody requestFile = RequestBody.create (MediaType.parse("image/*"), file);
// MultipartBody.Part is used to send also the actual file name
return MultipartBody.Part.createFormData("shop_images[]", file.getName(), requestFile);
}
最后在这里，我得到了我的图像路径
public class FileUtils {
private FileUtils() {} //private constructor to enforce Singleton pattern
/** TAG for log messages. */
private static final String TAG = "FileUtils";
private static final boolean DEBUG = false; // Set to true to enable logging
static final String MIME_TYPE_AUDIO = "audio/*";
static final String MIME_TYPE_TEXT = "text/*";
static final String MIME_TYPE_IMAGE = "image/*";
static final String MIME_TYPE_VIDEO = "video/*";
static final String MIME_TYPE_APP = "application/*";
public static final String HIDDEN_PREFIX = ".";
/**
* Gets the extension of a file name, like ".png" or ".jpg".
*
* @param uri Image URI
* @return Extension including the dot("."); "" if there is no extension;
* null if uri was null.
*/
public static String getExtension(String uri) {
if (uri == null) {
return null;
}
int dot = uri.lastIndexOf(".");
if (dot >= 0) {
return uri.substring(dot);
} else {
// No extension.
return "";
}
}
public static File getFile(Context context, Uri uri) {
String path = getPath(context, uri);
assert path != null;
return new File(path);
}
static String nopath = "Select Video Only";
@TargetApi(Build.VERSION_CODES.KITKAT)
@SuppressLint("NewApi")
public static String getPath(final Context context, final Uri uri) {
// check here to KITKAT or new version
final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
// DocumentProvider
if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
// ExternalStorageProvider
if (isExternalStorageDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
if ("primary".equalsIgnoreCase(type)) {
return Environment.getExternalStorageDirectory() + "/"
+ split[1];
}
}
// DownloadsProvider
else if (isDownloadsDocument(uri)) {
final String id = DocumentsContract.getDocumentId(uri);
final Uri contentUri = ContentUris.withAppendedId(
Uri.parse("content://downloads/public_downloads"),
Long.valueOf(id));
return getDataColumn(context, contentUri, null, null);
}
// MediaProvider
else if (isMediaDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
Uri contentUri = null;
if ("image".equals(type)) {
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else if ("video".equals(type)) {
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
} else if ("audio".equals(type)) {
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
}
final String selection = "_id=?";
final String[] selectionArgs = new String[] { split[1] };
return getDataColumn(context, contentUri, selection,
selectionArgs);
}
}
// MediaStore (and general)
else if ("content".equalsIgnoreCase(uri.getScheme())) {
// Return the remote address
if (isGooglePhotosUri(uri))
return uri.getLastPathSegment();
return getDataColumn(context, uri, null, null);
}
// File
else if ("file".equalsIgnoreCase(uri.getScheme())) {
return uri.getPath();
}
return nopath;
}
/**
* Get the value of the data column for this Uri. This is <span id="IL_AD2"
* class="IL_AD">useful</span> for MediaStore Uris, and other file-based
* ContentProviders.
*
* @param context
* The context.
* @param uri
* The Uri to query.
* @param selection
* (Optional) Filter used in the query.
* @param selectionArgs
* (Optional) Selection arguments used in the query.
* @return The value of the _data column, which is typically a file path.
*/
public static String getDataColumn(Context context, Uri uri,
String selection, String[] selectionArgs) {
Cursor cursor = null;
final String column = "_data";
final String[] projection = { column };
try {
cursor = context.getContentResolver().query(uri, projection,
selection, selectionArgs, null);
if (cursor != null && cursor.moveToFirst()) {
final int index = cursor.getColumnIndexOrThrow(column);
return cursor.getString(index);
}
} finally {
if (cursor != null)
cursor.close();
}
return nopath;
}
private static boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is DownloadsProvider.
*/
private static boolean isDownloadsDocument(Uri uri) {
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is MediaProvider.
*/
private static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is Google Photos.
*/
private static boolean isGooglePhotosUri(Uri uri) {
return "com.google.android.apps.photos.content".equals(uri.getAuthority());
}
}
我不知道哪里出问题了，因为我也可以在回收视图中显示图像，但是在尝试获取文件路径时却显示为空值