android-file

问题 Hello I need to display album art for music files efficiently using Picasso . I already configured picasso in my app. But I am not able to display album art from internal storage for music files. I tried this code but it's not working means no error but it doesn't display anything. Using uri : cursor = getContentResolver().query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, null, MediaStore.Audio.AudioColumns.DURATION + ">0", null, sortOrder); cursor.moveToFirst(); a = cursor.getString(cursor

问题 I don't have much experience working with the camera and files in general. I've integrated CameraKit's library to capture images, and this is my current code: captureButton.setOnClickListener { cameraKitView.captureImage() { _, p1 -> val timeStamp = System.currentTimeMillis().toString() val fileName = "Dere$timeStamp.jpg" val path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).toString() + File.separator + "Dere" val outputDir = File(path) outputDir.mkdir()

问题 I want to read the file names from the default internal storage folder of my app but even if there are some files I get a List of size 0 I use the following to read the file names File dirFiles = Settings.this.getFilesDir(); File list[] = dirFiles.listFiles(); for( int i=0; i< list.length; i++) { myList.add( list[i].getName() ); } What I am doing wrong here? is the path I get correct? or it needs to have a "/" at the end of it? /data/data/com.compfrind.contacts/files 回答1: Try this way private

问题 I am facing the issues in picking the file path of the file, i searched for all over the stack overflow but the issue is not solved .Code for picking the files from the device is shown below. Intent intent = new Intent(Intent.ACTION_GET_CONTENT); intent.setType("*/*"); intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); //intent.addFlags(ST) startActivityForResult(Intent.createChooser(intent, "Choose File to Upload.."), PICK_FILE_REQUEST); The picked files from intent are get by protected

问题 I'm using DownloadManager to download file, I wanted to put the downloads in the standard download folder so people could easily find them using file manager looking in the most obvious place: Uri downloadLocation = Uri.fromFile(new File(Environment.DIRECTORY_DOWNLOADS, filename)); request.setDestinationUri(downloadLocation); Long reference = downloadManager.enqueue(request); But I get an exception because that isn't an external drive. Is there no way to download a file to the user's download

问题 I am trying to check if a file exits on android sd card...so i do: File f=new File(sdpath + "/" + DATABASE_NAME); // if(!f.exits()) { ...create new file.. } else { ...do something... } Every time this actually creates the directory or file on the sd card. I know it doesnt exist, and when the new File is executed it is created and it shouldnt ? I read all across google that new File doesnt create an actual file on the file system , but in my case it does... Any alternatives to checking if a

问题 I mean , I want to delete line from my text on android. How can I delete? I do not want to read one txt and create another with removing line. I want to delete line from my existing txt. thanks. 回答1: This is a pretty tricky problem, despite it looking a trivial one. In case of variable lines length, maybe your only option is reading the file line by line to indentify offset and length of the target line. Then copying the following portion of the file starting at offset , eventually truncating

问题 I am trying to open the pdf file which I downloaded & saved in external storage. But When I open my app its gets crashed and showing following error; 08-31 00:58:31.304 1807-1807/? E/AndroidRuntime: FATAL EXCEPTION: main Process: medimanage.corporate.mobile, PID: 1807 java.lang.RuntimeException: Unable to get provider android.support.v4.content.FileProvider: java.lang.IllegalArgumentException: Missing android.support.FILE_PROVIDER_PATHS meta-data at android.app.ActivityThread.installProvider

问题 OnActivityCreated I'm doing: activity.getExternalFilesDir(Environment.DIRECTORY_PICTURES); In logcat I get: com.package W/ContextImpl﹕ Failed to ensure directory: /storage/sdcard1/Android/data/com.package/files/Pictures This happens only on LOLLIPOP (MOTO G 2014), and everything is fine on KITKAT (Nexus 4). I've WRITE_EXTERNAL_STORAGE on manifest. What am I missing here? The storage is mounted and reachable via a file browsing app (like ES Explorer). EDIT: Surprisingly the file is correctly

问题 Hi guys i am having a audio file in assets folder and i need to save the same file onto sdcard . How to acheive this. Below is the code i am using to save file String filename = "filename.txt"; File file = new File(Environment.getExternalStorageDirectory(), filename); FileOutputStream fos; byte[] data = new String("data to write to file").getBytes(); try { fos = new FileOutputStream(file); fos.write(data); fos.flush(); fos.close(); } catch (FileNotFoundException e) { // handle exception }