类似于这个问题File not found error after selecting a file in android ，从 SD 选择文件后，我收到文件未找到异常，但是提供的问题中的解决方案对我不起作用，而且还导致另一个文件未找到异常。这是我的代码，它恰好在带有箭头的指示行处抛出 filenotfoundException
private 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);
}
谁能告诉我为什么链接中的解决方案对我不起作用？或者我可以做些什么来解决这个问题？或者可能出了什么问题？ 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!
最佳答案
使用下面的代码获取所选文件的路径
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());
}
}
希望这对你有帮助
关于android - Android 选择文件后使用文件时未找到文件，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/35429799/