把做工程过程常用的一些代码段做个记录，下面代码是关于Java实现图片倒影的的代码，应该对大家有较大用处。
public class ButtonImageActivity extends Activity {private ImageView image_btn;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);image_btn=(ImageView)findViewById(R.id.image_btn);Bitmap bitmap =((BitmapDrawable)getResources().getDrawable(R.drawable.image_btn)).getBitmap();image_btn.setImageBitmap(createReflectedImage(bitmap));image_btn.setOnClickListener(new OnClickListener() {public void onClick(View v) {}});}private Bitmap createReflectedImage(Bitmap originalBitmap) { final int reflectionGap = 4; int width = originalBitmap.getWidth(); int height = originalBitmap.getHeight(); Matrix matrix = new Matrix(); matrix.preScale(1, -1); Bitmap reflectionBitmap = Bitmap.createBitmap(originalBitmap, 0, height / 2, width, height / 2, matrix, false); Bitmap withReflectionBitmap = Bitmap.createBitmap(width, (height + height / 2 + reflectionGap), Config.ARGB_8888); Canvas canvas = new Canvas(withReflectionBitmap); canvas.drawBitmap(originalBitmap, 0, 0, null); Paint defaultPaint = new Paint(); canvas.drawRect(0, height, width, height + reflectionGap, defaultPaint); canvas.drawBitmap(reflectionBitmap, 0, height + reflectionGap, null); Paint paint = new Paint(); LinearGradient shader = new LinearGradient(0, originalBitmap.getHeight(), 0, withReflectionBitmap.getHeight(), 0x70ffffff, 0x00ffffff, TileMode.MIRROR); paint.setShader(shader); paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN)); canvas.drawRect(0, height, width, withReflectionBitmap.getHeight(), paint); return withReflectionBitmap; } }
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本文标题: Java实现图片倒影的源码实例内容
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