Android Open, save picture to SD card, show picture

1. Open the root directory under Test.jpg

Bitmap BM = Bitmapfactory.decodefile (Environment.getexternalstoragedirectory (). GetAbsolutePath () + "/test.jpg");

int[] pixels = new Int[bm.getwidth () *bm.getheight ()];

Bm.getpixels = (Pixels,0,bm.getwidth (), 0,0,bm.getwidth (), Bm.getheight ());

Bitmap bm1 = bm.copy (Bm.getconfig (), true),//BM is not Mutable, pixel value cannot be changed

Bm1.setpixels (Pixels,0,bm.getwidth (), 0,0,bm.getwidth (), Bm.getheight ());

Savebitmap ("Test2", BM1);

Imagevie Imgview = (ImageView) Findviewbyid (R.ID.IMAGEVIEW1);

Imgview.setimagebitmap (BM1);

2. Save the picture

public void Savebitmap (String name,bitmap mbitmap) {

File File = new file (Environment.getexternalstoragedirectory (). GetAbsolutePath () + "/" +name+ ". png");

File.createnewfile ();

FileOutputStream fout = null;

Fout = new FileOutputStream (file);

Mbitmap.compress (bitmap.compressformat.png,100,fout);

Fout.flush ();

Fout.close ();

}

Android Open, save picture to SD card, show picture