In Android, The Drawable resource ID is stored on the Sdcard, And the drawablesdcard

In Android, The Drawable resource ID is stored on the Sdcard, And the drawablesdcard

The process is divided into three steps:
1. Convert resource ID to Drawable
2. Convert Drawable to Bitmap
3. Store Bitmap on Sdcard

The Code is as follows:

Public class MainActivity extends ActionBarActivity {@ Override protected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); saveDrawableById (R. drawable. p4, "p4.jpg", Bitmap. compressFormat. JPEG);}/*** the image whose storage resource is ID * @ param id * @ param name */public void saveDrawableById (int id, String name, Bitmap. compressFormat format) {Drawable drawable = idToDrawable (id); Bitmap bitmap = drawableToBitmap (drawable); saveBitmap (bitmap, name, format );} /*** convert the resource ID to Drawable * @ param id * @ return */public Drawable idToDrawable (int id) {return this. getResources (). getDrawable (R. drawable. p4);}/*** converts Drawable to Bitmap * @ param drawable * @ return */public Bitmap drawableToBitmap (Drawable drawable) {if (drawable = null) return null; return (BitmapDrawable) drawable ). getBitmap ();}/*** save Bitmap to the specified path * @ param bitmap * @ param path */public void saveBitmap (Bitmap bitmap, String name, Bitmap. compressFormat format) {// create a File on the SD card file = new File (Environment. getExternalStorageDirectory (), name); FileOutputStream out = null; try {// open the output stream of the specified file out = new FileOutputStream (file); // output the bitmap to the specified file. compress (format, 100, out); out. close ();} catch (IOException e) {e. printStackTrace ();}}}

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