类似于这个问题File not found error after selecting a file in android，我从SD中选择一个文件后得到一个文件未找到异常但是提供的问题中的解决方案对我不起作用，但也导致另一个文件未找到异常。这是我的代码，它会使用箭头
在指定的行处精确抛出filenotfoundexceptionprivate void fileChooser() {
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("*/*");
intent.addCategory(Intent.CATEGORY_OPENABLE);
try {
startActivityForResult(
Intent.createChooser(intent, "Select a File to Upload"),0);
} catch (android.content.ActivityNotFoundException ex) {
// Potentially direct the user to the Market with a Dialog
Toast.makeText(this, "Please install a File Manager.",
Toast.LENGTH_SHORT).show();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case 0:
if (resultCode == RESULT_OK) {
// Get the Uri of the selected file
Uri uri = data.getData();
// Get the path
try {
File f=new File(uri.getPath());
Bitmap mBitmap=null;
screenRuntime.getRewriteMachine().addSendFile(f);
ParcelFileDescriptor pfd=ParcelFileDescriptor.open(f,ParcelFileDescriptor.MODE_READ_ONLY); <-------------
PdfRenderer renderer=new PdfRenderer(pfd);
final int pageCount = renderer.getPageCount();
for (int i = 0; i < pageCount; i++) {
PdfRenderer.Page page = renderer.openPage(i);
// say we render for showing on the screen
page.render(mBitmap, null, null, PdfRenderer.Page.RENDER_MODE_FOR_DISPLAY);
// do stuff with the bitmap
// close the page
page.close();
}
RelativeLayout rl=(RelativeLayout)findViewById(R.id.mainContent);
rl.setBackground(new BitmapDrawable(content.getResources(),mBitmap));
// close the renderer
renderer.close();
} catch (IOException e) {
e.printStackTrace();
}
Log.wtf("Sent file","Sent file");
// Get the file instance
// File file = new File(path);
// Initiate the upload
}
break;
}
super.onActivityResult(requestCode, resultCode, data);
}
有谁能告诉我为什么链接中的解决方案对我不起作用？或者我能做些什么来解决这个问题？或者可能出现什么问题？ 这是日志的副本
第110行是ParcelFileDescriptor pfd = ParcelFileDescriptor.open（f，ParcelFileDescriptor.MODE_READ_ONLY）;
02-16 14:50:22.969 26284-26284/cmu.edu.screenshare W/System.err﹕ java.io.FileNotFoundException: No such file or directory
02-16 14:50:22.969 26284-26284/cmu.edu.screenshare W/System.err﹕ at android.os.Parcel.openFileDescriptor(Native Method)
02-16 14:50:22.969 26284-26284/cmu.edu.screenshare W/System.err﹕ at android.os.ParcelFileDescriptor.openInternal(ParcelFileDescriptor.java:253)
02-16 14:50:22.969 26284-26284/cmu.edu.screenshare W/System.err﹕ at android.os.ParcelFileDescriptor.open(ParcelFileDescriptor.java:199)
02-16 14:50:22.969 26284-26284/cmu.edu.screenshare W/System.err﹕ at cmu.edu.screenshare.MainActivity.onActivityResult(MainActivity.java:110)
02-16 14:50:22.969 26284-26284/cmu.edu.screenshare W/System.err﹕ at android.app.Activity.dispatchActivityResult(Activity.java:6160)
02-16 14:50:22.969 26284-26284/cmu.edu.screenshare W/System.err﹕ at android.app.ActivityThread.deliverResults(ActivityThread.java:3877)
02-16 14:50:22.969 26284-26284/cmu.edu.screenshare W/System.err﹕ at android.app.ActivityThread.handleSendResult(ActivityThread.java:3931)
02-16 14:50:22.969 26284-26284/cmu.edu.screenshare W/System.err﹕ at android.app.ActivityThread.access$1300(ActivityThread.java:144)
02-16 14:50:22.969 26284-26284/cmu.edu.screenshare W/System.err﹕ at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1408)
02-16 14:50:22.969 26284-26284/cmu.edu.screenshare W/System.err﹕ at android.os.Handler.dispatchMessage(Handler.java:102)
02-16 14:50:22.969 26284-26284/cmu.edu.screenshare W/System.err﹕ at android.os.Looper.loop(Looper.java:155)
02-16 14:50:22.969 26284-26284/cmu.edu.screenshare W/System.err﹕ at android.app.ActivityThread.main(ActivityThread.java:5696)
02-16 14:50:22.969 26284-26284/cmu.edu.screenshare W/System.err﹕ at java.lang.reflect.Method.invoke(Native Method)
02-16 14:50:22.969 26284-26284/cmu.edu.screenshare W/System.err﹕ at java.lang.reflect.Method.invoke(Method.java:372)
02-16 14:50:22.969 26284-26284/cmu.edu.screenshare W/System.err﹕ at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1029)
02-16 14:50:22.969 26284-26284/cmu.edu.screenshare W/System.err﹕ at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:824)
谢谢！
答案 0 :(得分：4)
使用以下代码从所选文件中获取路径
public class SelectedFilePath{
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://<span id="IL_AD1" class="IL_AD">downloads</span>/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 null;
}
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 null;
}
public static boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".equals(uri.getAuthority());
}
public static boolean isDownloadsDocument(Uri uri) {
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}
public static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
public static boolean isGooglePhotosUri(Uri uri) {
return "com.google.android.apps.photos.content".equals(uri.getAuthority());
}
}
希望这会对你有所帮助
答案 1 :(得分：0)
您在此处收到的URI可能不是该文件。它可能是内容URI。
必须从getContentResolver().openInputStream(uri)读取此类URI。
请尝试以下代码：
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
addedFiles = new ArrayList<Attachment>();
if (resultCode == RESULT_OK) {
switch (requestCode) {
case ADD_FILE_REQ_CODE:
if (data.getData() != null) {
Uri uri = data.getData();
File newFile = new File(uri.getPath());
try {
InputStream ips = getContentResolver().openInputStream(uri);
byte[] bytes = new byte[ips.available()];
ips.read(bytes, 0, bytes.length);
<<Your logic continues>>
}
}