在奇巧(或新画廊)之前,意图。ACTION_GET_CONTENT返回一个这样的URI
内容:/ /媒体/外部/图片/媒体/ 3951。
使用ContentResolver并查询 media . data返回文件URL。
然而,在奇巧,画廊返回一个URI(通过“Last”)像这样:
内容:/ / com.android.providers.media.documents /文档/图片:3951
我该怎么处理呢?
在奇巧(或新画廊)之前,意图。ACTION_GET_CONTENT返回一个这样的URI
内容:/ /媒体/外部/图片/媒体/ 3951。
使用ContentResolver并查询 media . data返回文件URL。
然而,在奇巧,画廊返回一个URI(通过“Last”)像这样:
内容:/ / com.android.providers.media.documents /文档/图片:3951
我该怎么处理呢?
当前回答
我相信已经发布的回复应该会让人们朝着正确的方向前进。然而,以下是我所做的对我正在更新的遗留代码有意义的事情。遗留代码使用图库中的URI来更改和保存图像。
在4.4之前(和谷歌驱动器),uri看起来是这样的: 内容:/ /媒体/外部/图片/媒体/ 41
正如问题中所述,它们通常是这样的: 内容:/ / com.android.providers.media.documents /文档/图片:3951
因为我需要保存图像的能力,而不打扰已经存在的代码,我只是从图库中复制URI到应用程序的数据文件夹中。然后从数据文件夹中保存的图像文件中产生一个新的URI。
这个想法是这样的:
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("image/*");
startActivityForResult(intent), CHOOSE_IMAGE_REQUEST);
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
File tempFile = new File(this.getFilesDir().getAbsolutePath(), "temp_image");
//Copy URI contents into temporary file.
try {
tempFile.createNewFile();
copyAndClose(this.getContentResolver().openInputStream(data.getData()),new FileOutputStream(tempFile));
}
catch (IOException e) {
//Log Error
}
//Now fetch the new URI
Uri newUri = Uri.fromFile(tempFile);
/* Use new URI object just like you used to */
}
注意- copyAndClose()只是执行文件I/O,将InputStream复制到FileOutputStream。代码没有被发布。
其他回答
试试这个:
if (Build.VERSION.SDK_INT <19){
Intent intent = new Intent();
intent.setType("image/jpeg");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, getResources().getString(R.string.select_picture)),GALLERY_INTENT_CALLED);
} else {
Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("image/jpeg");
startActivityForResult(intent, GALLERY_KITKAT_INTENT_CALLED);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode != Activity.RESULT_OK) return;
if (null == data) return;
Uri originalUri = null;
if (requestCode == GALLERY_INTENT_CALLED) {
originalUri = data.getData();
} else if (requestCode == GALLERY_KITKAT_INTENT_CALLED) {
originalUri = data.getData();
final int takeFlags = data.getFlags()
& (Intent.FLAG_GRANT_READ_URI_PERMISSION
| Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
// Check for the freshest data.
getContentResolver().takePersistableUriPermission(originalUri, takeFlags);
}
loadSomeStreamAsynkTask(originalUri);
}
可能需要
@SuppressLint(“NewApi”)
for
takePersistableUriPermission
这是一个完全的hack,但这是我所做的…
因此,在设置DocumentsProvider时,我注意到样例代码(在getDocIdForFile中,大约在第450行)根据文件相对于指定根的路径(即在第96行中设置mBaseDir的路径)为所选文档生成了唯一的id。
所以URI最终看起来像这样:
内容:/ / com.example.provider /文档/根:路径/ / /文件
正如文档所说,它假设只有一个根(在我的情况下是Environment.getExternalStorageDirectory(),但你可以在其他地方使用…然后它获取文件路径,从根目录开始,并使其成为唯一的ID,前置“root:”。所以我可以通过消除uri.getPath()中的“/document/root:”部分来确定路径,通过这样做来创建一个实际的文件路径:
public void onActivityResult(int requestCode, int resultCode, Intent data) {
// check resultcodes and such, then...
uri = data.getData();
if (uri.getAuthority().equals("com.example.provider")) {
String path = Environment.getExternalStorageDirectory(0.toString()
.concat("/")
.concat(uri.getPath().substring("/document/root:".length())));
doSomethingWithThePath(path); }
else {
// another provider (maybe a cloud-based service such as GDrive)
// created this uri. So handle it, or don't. You can allow specific
// local filesystem providers, filter non-filesystem path results, etc.
}
我知道。这很可耻,但它奏效了。同样,这依赖于您在应用程序中使用自己的文档提供程序来生成文档ID。
(此外,还有一种更好的方法来构建路径,不假设“/”是路径分隔符,等等。但你懂的。)
你的问题的答案是你需要有权限。在manifest.xml文件中输入以下代码:
<uses-sdk android:minSdkVersion="8" android:targetSdkVersion="18" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
<uses-permission android:name="android.permission.WRITE_OWNER_DATA"></uses-permission>
<uses-permission android:name="android.permission.READ_OWNER_DATA"></uses-permission>`
这对我很管用……
This is what I do: Uri selectedImageURI = data.getData(); imageFile = new File(getRealPathFromURI(selectedImageURI)); private String getRealPathFromURI(Uri contentURI) { Cursor cursor = getContentResolver().query(contentURI, null, null, null, null); if (cursor == null) { // Source is Dropbox or other similar local file path return contentURI.getPath(); } else { cursor.moveToFirst(); int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA); return cursor.getString(idx); } } NOTE: managedQuery() method is deprecated, so I am not using it.
这个答案是来自m3n0R的问题安卓得到真正的路径Uri.getPath()和我声称没有信用。我只是想那些还没有解决这个问题的人可以使用这个。
我在这里尝试了几个答案,我认为我有一个解决方案,每次都可以工作,并且还可以管理权限。
这是基于LEO的巧妙解决方案。这篇文章应该包含所有的代码,你需要使这个工作,它应该工作在任何手机和Android版本;)
为了能够从SD卡中选择文件,你需要在你的清单中这样做:
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
常量:
private static final int PICK_IMAGE = 456; // Whatever number you like
public static final int MY_PERMISSIONS_REQUEST_READ_EXTERNAL = 28528; // Whatever number you like
public static final String FILE_TEMP_NAME = "temp_image"; // Whatever file name you like
检查权限和launchImagePick如果可能的话
if (ContextCompat.checkSelfPermission(getThis(),
Manifest.permission.READ_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(getThis(),
new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},
MY_PERMISSIONS_REQUEST_READ_EXTERNAL);
}
else {
launchImagePick();
}
允许响应
@Override
public void onRequestPermissionsResult(int requestCode,
@NonNull
String permissions[],
@NonNull
int[] grantResults) {
if (manageReadExternalPermissionResponse(this, requestCode, grantResults)) {
launchImagePick();
}
}
管理权限响应
public static boolean manageReadExternalPermissionResponse(final Activity activity, int requestCode, int[] grantResults) {
if (requestCode == MY_PERMISSIONS_REQUEST_READ_EXTERNAL) {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// Permission was granted, yay! Do the
// contacts-related task you need to do.
return true;
} else if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_DENIED) {
boolean showRationale = ActivityCompat.shouldShowRequestPermissionRationale(activity,
Manifest.permission.READ_EXTERNAL_STORAGE);
if (!showRationale) {
// The user also CHECKED "never ask again".
// You can either enable some fall back,
// disable features of your app
// or open another dialog explaining
// again the permission and directing to
// the app setting.
} else {
// The user did NOT check "never ask again".
// This is a good place to explain the user
// why you need the permission and ask if he/she wants
// to accept it (the rationale).
}
} else {
// Permission denied, boo! Disable the
// functionality that depends on this permission.
}
}
return false;
}
发射图像选择
private void launchImagePick() {
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("image/*");
intent.addCategory(Intent.CATEGORY_OPENABLE);
startActivityForResult(intent, PICK_IMAGE);
// see onActivityResult
}
管理图像选择响应
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PICK_IMAGE) {
if (resultCode == Activity.RESULT_OK) {
if (data != null && data.getData() != null) {
try {
InputStream inputStream = getContentResolver().openInputStream(data.getData())
if (inputStream != null) {
// No special persmission needed to store the file like that
FileOutputStream fos = openFileOutput(FILE_TEMP_NAME, Context.MODE_PRIVATE);
final int BUFFER_SIZE = 1 << 10 << 3; // 8 KiB buffer
byte[] buffer = new byte[BUFFER_SIZE];
int bytesRead = -1;
while ((bytesRead = inputStream.read(buffer)) > -1) {
fos.write(buffer, 0, bytesRead);
}
inputStream.close();
fos.close();
File tempImageFile = new File(getFilesDir()+"/"+FILE_TEMP_NAME);
// Do whatever you want with the File
// Delete when not needed anymore
deleteFile(FILE_TEMP_NAME);
}
}
catch (Exception e) {
e.printStackTrace();
}
} else {
// Error display
}
} else {
// The user did not select any image
}
}
}
这就是所有的人;这在我所有的电话上都适用。