Android學習筆記_66_圖片處理專題

　　1、圖片縮放：不解析整個圖片資訊。

  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擷取或設定圖片的exif資訊：

  DemoActivity  =  ExifInterface("sdcard/img.jpg""camera", "柯達相機""camera"

      3、從圖庫裡面選擇一個圖片，然後將它設定到ImageView。

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

　　4、建立圖片（bitmap）的拷貝：

  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、圖片合成：

  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、根據路徑Path繪製文字：

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

　　7、繪圖（根據手指移動建立圖片並儲存）：

  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://"+