Android study note _ 66 _ image processing topic

1. Image Scaling: the entire image information is not parsed.

  DemoActivity  = (ImageView)                          Display currentDisplay = dw = dh =        BitmapFactory.Options bmpFactoryOptions =         bmpFactoryOptions.inJustDecodeBounds =         Bitmap bmp = BitmapFactory.decodeFile("/sdcard/img.jpg"         heightRatio = ()Math.ceil(bmpFactoryOptions.outHeight/( widthRatio = ()Math.ceil(bmpFactoryOptions.outWidth/("HEIGHTRATIO",""+"WIDTHRATIO",""+        bmpFactoryOptions.inJustDecodeBounds = (heightRatio>=== BitmapFactory.decodeFile("/sdcard/img.jpg"

2. ExifInterface:

DemoActivity = ExifInterface ("sdcard/img.jpg" "camera", "Kodak camera" "camera"

3. Select an image from the image library and set it to ImageView.

  DemoActivity  = (ImageView)          Intent intent = "image/*"0  onActivityResult( requestCode, (data!=            Uri uri =

4. Create a copy of an image (bitmap:

  DemoActivity  = (ImageView) = (ImageView)  = "image/*"0  onActivityResult( requestCode, (data!=            Uri uri =                            Bitmap bitmap =                Matrix matrix =                 Paint paint = );                matrix.setRotate(15);                Bitmap    alteredBitmap = Bitmap.createBitmap(bitmap, 0, 0                Canvas canvas = 

5. image synthesis:

  DemoActivity  = (ImageView)  = "image/*"10 =  File("/sdcard/1.jpg"= 100            Intent intent =  Intent(Intent.ACTION_MEDIA_MOUNTED,Uri.parse("file://"+ = "image/*"20  onActivityResult( requestCode, (requestCode==10(data!===== = 0, 0 (requestCode==20(data!==                =0,0

6. Draw text based on Path:

  DemoActivity   MyView(  MyView  = 20= 20, 20100, 150200, 220"Hello this is text on a path", p, 0, 0

7. Drawing (move your finger to create an image and save it ):

  DemoActivity  = (ImageView) = height = diaplay.getHeight() - 40 width === = 10 startx = 0 starty = 0 == x = y === endx = endy =  =  File("/sdcard/"+System.currentTimeMillis()+".jpg"= 100            Intent intent =  Intent(Intent.ACTION_MEDIA_MOUNTED,Uri.parse("file://"+