android - API 级别 29 Intent.ACTION_GET_CONTENT 从下载文件夹返回错误 ID
问题描述
我正在尝试查找从文件选择器意图返回的 URI 的完整文件路径。我从 Internet 下载了一张图片,该图片保存在浏览器默认下载文件夹中。问题是 DocumentsContract.getDocumentId(content_describer) 返回的 id 类似于 "msf:254" 而不是通常返回的 Long 类型的 id。代码如下
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 101 && resultCode == Activity.RESULT_OK) {
Uri content_describer = data.getData();
String src = content_describer.getPath();
try {
Bitmap bitmap = MediaStore.Images.Media.getBitmap(getActivity().getContentResolver(), data.getData());
imgView.setImageBitmap(bitmap);
}catch(Exception e){
}
Log.e("selected file", content_describer.toString());
String filename = content_describer.getLastPathSegment();
Log.e("selected path", filename);
Log.e("authority",content_describer.getAuthority());
if (content_describer.getAuthority().equals("com.android.externalstorage.documents")) {
final String docId = DocumentsContract.getDocumentId(content_describer);
final String[] split = docId.split(":");
final String type = split[0];
Log.e("npath", "getPath() docId: " + docId + ", split: " + split.length + ", type: " + type);
if ("primary".equalsIgnoreCase(type)) {
if (split.length > 1) {
Log.e("nnpath1", Environment.getExternalStorageDirectory() + "/" + split[1]);
curFile = Environment.getExternalStorageDirectory() + "/" + split[1];
} else {
Log.e("nnpath2", Environment.getExternalStorageDirectory() + "/");
}
// This is for checking SD Card
} else {
Log.e("nnpath3", "storage" + "/" + docId.replace(":", "/"));
curFile = "storage" + "/" + docId.replace(":", "/");
}
}
if (content_describer.getAuthority().equals("com.android.providers.downloads.documents")) {
final String docId = DocumentsContract.getDocumentId(content_describer);
Log.e("docid",docId);
Uri ci = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(docId));
final String column = "_data";
final String[] projection = {
column
};
Cursor cursor10 = getActivity().getApplicationContext().getContentResolver().query(ci, projection, null, null,
null);
if (cursor10 != null && cursor10.moveToFirst()) {
final int column_index = cursor10.getColumnIndexOrThrow(column);
Log.e("imgpp", cursor10.getString(column_index));
Log.e("imgpp2", Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).getPath());
File fn = new File(cursor10.getString(column_index));
Log.e("imgpp3", fn.getPath());
curFile = fn.getPath();
}
}
if (content_describer.getAuthority().equals("com.android.providers.media.documents")) {
final String docId = DocumentsContract.getDocumentId(content_describer);
Log.e("docid", docId);
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]
};
final String column = "_data";
final String[] projection = {
column
};
Cursor cursor1 = getActivity().getApplicationContext().getContentResolver().query(contentUri, projection, selection, selectionArgs,
null);
if (cursor1 != null && cursor1.moveToFirst()) {
final int column_index = cursor1.getColumnIndexOrThrow(column);
Log.e("imgpp", cursor1.getString(column_index));
Log.e("imgpp2", Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).getPath());
File fn = new File(cursor1.getString(column_index));
Log.e("imgpp3", fn.getPath());
curFile = fn.getPath();
}
}
Log.e("final path",curFile);
}
}
请注意,如果我通过图像->下载选择相同的图像,上面的代码可以正常工作,但是当从下载文件夹中选择相同的文件时,会抛出以下错误
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.flexi.app.android, PID: 15414
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=196709, result=-1, data=Intent { dat=content://com.android.providers.downloads.documents/document/msf:253 flg=0x1 }} to activity {com.flexi.app.android/com.flexi.app.android.ProfileActivity}: java.lang.IllegalArgumentException: Unknown URI: content://downloads/public_downloads/253
at android.app.ActivityThread.deliverResults(ActivityThread.java:4830)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4871)
at android.app.servertransaction.ActivityResultItem.execute(ActivityResultItem.java:51)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2009)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7319)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:934)
Caused by: java.lang.IllegalArgumentException: Unknown URI: content://downloads/public_downloads/253
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:170)
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:140)
at android.content.ContentProviderProxy.query(ContentProviderNative.java:423)
at android.content.ContentResolver.query(ContentResolver.java:934)
at android.content.ContentResolver.query(ContentResolver.java:872)
at android.content.ContentResolver.query(ContentResolver.java:830)
at com.flexi.app.android.fragments.ProfileImageFragment.onActivityResult(ProfileImageFragment.java:171)
at androidx.fragment.app.FragmentActivity.onActivityResult(FragmentActivity.java:170)
at com.flexi.app.android.ProfileActivity.onActivityResult(ProfileActivity.java:28)
at android.app.Activity.dispatchActivityResult(Activity.java:8091)
URI 报告为 content://com.android.providers.downloads.documents/document/msf%3A253 知道什么是 msf 吗?我看过图像、视频、audo,但第一次注意到 msf。
解决方案
当您在 URI 中获得“msf:xxx”时,请使用以下解决方案:
if (id != null && id.startsWith("msf:")) {
final File file = new File(mContext.getCacheDir(), Constant.TEMP_FILE + Objects.requireNonNull(mContext.getContentResolver().getType(imageUri)).split("/")[1]);
try (final InputStream inputStream = mContext.getContentResolver().openInputStream(imageUri); OutputStream output = new FileOutputStream(file)) {
final byte[] buffer = new byte[4 * 1024]; // or other buffer size
int read;
while ((read = inputStream.read(buffer)) != -1) {
output.write(buffer, 0, read);
}
output.flush();
return file;
} catch (IOException ex) {
ex.printStackTrace();
}
return null;
}
我已经解决了这个问题,它对 msf 100% 有效。:)
完成工作后还要删除临时文件:
private void deleteTempFile() {
final File[] files = requireContext().getCacheDir().listFiles();
if (files != null) {
for (final File file : files) {
if (file.getName().contains(Constant.TEMP_FILE)) {
file.delete();
}
}
}
}
这里的 TEMP_FILE 值为“temp”。
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