android-external-storage

I couldn’t write files in Android P Memory Card. The same code is working fine in Android O. new File(file.getParent()).mkdirs(); output = new ObjectOutputStream(new FileOutputStream(file)); output.writeObject(obj); I am able to read the files from the same device(Memory Card), but when I try to write the file, it is throwing Permission Denied exception. Initially it was throwing me No such file or Directory , but after giving root permissions, it is throwing Permission Deniod exception. Note: My app is system privileged app and also I have given the Devicewith root permission by adb root,

I am trying to request user permissions at runtime. The API is 23 and I want to pick up an image from the phone's gallery. Following some snippets, this is the code I have so far: In the onCreate() of the Activity I check: if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) { imageUploader5.setEnabled(true); ActivityCompat.requestPermissions(this, new String[] { Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE }, 0); } Then I override: @Override public void onRequestPermissionsResult(int requestCode, String[]

How do you check if the SD card is full or not so that your application can decide if it can continue to do its job i.e. write to external storage or notify the user that storage has run out of space. Jonik Watch out with StatFs & int overflow on newer devices The approach in this answer is broken on devices with large external storage . For example on my Nexus 7, it currently returns ~2 GB when in reality there is ~10 GB of space left. // DOES NOT WORK CORRECTLY ON DEVICES WITH LARGE STORAGE DUE TO INT OVERFLOW File externalStorageDir = Environment.getExternalStorageDirectory(); StatFs statFs

getExternalStorageDirectory() return SD card path on my phone. ( Huawei Y320 - android 4.2.2 ). now, how to get path Phone Storage path for all devices and all API? loot at bottom screenshot. I'm using this method: public static final String SD_CARD = "sdCard"; public static final String EXTERNAL_SD_CARD = "externalSdCard"; private static final String ENV_SECONDARY_STORAGE = "SECONDARY_STORAGE"; public static Map<String, File> getAllStorageLocations() { Map<String, File> storageLocations = new HashMap<>(10); File sdCard = Environment.getExternalStorageDirectory(); storageLocations.put(SD_CARD,

My app ( Android API 15 ) makes a picture and stores it in the internal memory's folder. Now, I want to copy this file to another folder inside of the external storage, e.g. /sdcard/myapp . I tried the following approaches: Approach #1: private void copyFile(File src, File dst) throws IOException { File from = new File(src.getPath()); File to = new File(dst.getPath()); from.renameTo(to); } Approach #2: private void copyFile(File src, File dst) throws IOException { FileChannel inChannel = null; FileChannel outChannel = null; try { inChannel = new FileInputStream(src).getChannel(); outChannel =

How can I serve files from the SECONDARY external storage using the FileProvider ? The current implementation of the FileProvider handles only the first directory returned by ContextCompat.getExternalFilesDirs ... } else if (TAG_EXTERNAL_FILES.equals(tag)) { File[] externalFilesDirs = ContextCompat.getExternalFilesDirs(context, null); if (externalFilesDirs.length > 0) { target = externalFilesDirs[0]; } } ... It seems, that there is no way to define a <path> entry for the FileProvider , that matches the secondary external storage path... And the answer is... FileProvider does not support that.