It happens because you have not installed the minSdkVersion or targetSdkVersion in you’re computer. I’ve tested it right now. For example, if you have those lines in your Manifest.xml: <uses-sdk android:minSdkVersion=”8″ android:targetSdkVersion=”17″ /> And you have installed only the API17 in your computer, it will report you an error. If you want to test it, … Read more
I think you can use substring method to get name of the file from the path string. String path=”:/storage/sdcard0/DCIM/Camera/1414240995236.jpg”; // it contains your image path…I’m using a temp string… String filename=path.substring(path.lastIndexOf(“https://stackoverflow.com/”)+1);
In your layout you’ll need something to display the text. A TextView is the obvious choice. So you’ll have something like this: <TextView android:id=”@+id/text_view” android:layout_width=”fill_parent” android:layout_height=”fill_parent”/> And your code will look like this: //Find the directory for the SD Card using the API //*Don’t* hardcode “/sdcard” File sdcard = Environment.getExternalStorageDirectory(); //Get the text file File … Read more
Summary You can grant read/write access to external SD card on the different api levels (API23+ at run time). Since KitKat, permissions are not necessary if you use app-specific directories, required otherwise. Universal way: The history says that there is no universal way to write to external SD card but continues… This fact is demonstrated … Read more
File sdCard = Environment.getExternalStorageDirectory(); File dir = new File (sdCard.getAbsolutePath() + “/dir1/dir2”); dir.mkdirs(); File file = new File(dir, “filename”); FileOutputStream f = new FileOutputStream(file); …
This should help you: Uri selectedUri = Uri.parse(Environment.getExternalStorageDirectory() + “/myFolder/”); Intent intent = new Intent(Intent.ACTION_VIEW); intent.setDataAndType(selectedUri, “resource/folder”); if (intent.resolveActivityInfo(getPackageManager(), 0) != null) { startActivity(intent); } else { // if you reach this place, it means there is no any file // explorer app installed on your device } Please, be sure that you have any … Read more
I have a variation on a solution I found here public static HashSet<String> getExternalMounts() { final HashSet<String> out = new HashSet<String>(); String reg = “(?i).*vold.*(vfat|ntfs|exfat|fat32|ext3|ext4).*rw.*”; String s = “”; try { final Process process = new ProcessBuilder().command(“mount”) .redirectErrorStream(true).start(); process.waitFor(); final InputStream is = process.getInputStream(); final byte[] buffer = new byte[1024]; while (is.read(buffer) != -1) { … Read more
The MediaStore API is probably throwing away the alpha channel (i.e. decoding to RGB565). If you have a file path, just use BitmapFactory directly, but tell it to use a format that preserves alpha: BitmapFactory.Options options = new BitmapFactory.Options(); options.inPreferredConfig = Bitmap.Config.ARGB_8888; Bitmap bitmap = BitmapFactory.decodeFile(photoPath, options); selected_photo.setImageBitmap(bitmap); or http://mihaifonoage.blogspot.com/2009/09/displaying-images-from-sd-card-in.html
Below is the code for your purpose : public static boolean externalMemoryAvailable() { return android.os.Environment.getExternalStorageState().equals( android.os.Environment.MEDIA_MOUNTED); } public static String getAvailableInternalMemorySize() { File path = Environment.getDataDirectory(); StatFs stat = new StatFs(path.getPath()); long blockSize = stat.getBlockSizeLong(); long availableBlocks = stat.getAvailableBlocksLong(); return formatSize(availableBlocks * blockSize); } public static String getTotalInternalMemorySize() { File path = Environment.getDataDirectory(); StatFs stat … Read more
Lots of good questions, let’s dig in. 🙂 How do you use it? Here’s a great tutorial for interacting with the Storage Access Framework in KitKat: https://developer.android.com/guide/topics/providers/document-provider.html#client Interacting with the new APIs in Lollipop is very similar. To prompt the user to pick a directory tree, you can launch an intent like this: Intent intent … Read more