Android开发:ImageView阴影和图层效果
Android开发:ImageView阴影和图层效果:
- import Android.app.Activity;
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import Android.content.Context;
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import Android.graphics.Bitmap;
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import Android.graphics.BitmapFactory;
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import Android.graphics.Canvas;
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import Android.graphics.Color;
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import Android.graphics.Paint;
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import Android.graphics.PorterDuff;
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import Android.graphics.PorterDuff.Mode;
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import Android.graphics.PorterDuffXfermode;
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import Android.graphics.Rect;
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import Android.graphics.RectF;
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import Android.graphics.drawable.Drawable;
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import Android.os.Bundle;
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import Android.view.View;
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public class MyCanvasActivity extends Activity {
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(new ImageEffect(this));
- }
-
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class ImageEffect extends View{
- Paint paint;
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public ImageEffect(Context context){
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super(context);
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paint= new Paint();
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paint.setAntiAlias(true);
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paint.setShadowLayer(5f, 5.0f, 5.0f, Color.BLACK);
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paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
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- }
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public void onDraw(Canvas canvas){
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super.onDraw(canvas);
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int posX = 20;
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int posY = 50;
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int PicWidth,PicHeight;
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- Drawable drawable = getResources().getDrawable(R.drawable.pic);
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Drawable dbe = getResources().getDrawable(R.drawable.pic).mutate();
- Drawable drawTest = getResources().getDrawable(R.drawable.pic);
- Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.pic);
- PicWidth = drawable.getIntrinsicWidth();
- PicHeight = drawable.getIntrinsicHeight();
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drawTest.setBounds(posX, (2 * posY) + PicHeight, posX + PicWidth, (2 * posY) + 2 * PicHeight );
- drawable.setBounds(posX,posY,posX+PicWidth,posY+PicHeight);
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dbe.setBounds(0, 0, PicWidth, PicHeight);
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canvas.drawColor(Color.WHITE);
- canvas.save(Canvas.MATRIX_SAVE_FLAG);
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dbe.setColorFilter(0x7f000000,PorterDuff.Mode.SRC_IN);
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canvas.translate(posX + (int)(0.9 * PicWidth/2), posY + PicHeight/2);
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canvas.skew(-0.9F, 0.0F);
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canvas.scale(1.0f, 0.5f);
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dbe.draw(canvas);
- drawable.clearColorFilter();
- canvas.restore();
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- canvas.save(Canvas.MATRIX_SAVE_FLAG);
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drawable.draw(canvas);
- canvas.restore();
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- canvas.save(Canvas.MATRIX_SAVE_FLAG);
- drawTest.draw(canvas);
- canvas.restore();
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-
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Rect rect = new Rect(2*posX + PicWidth + 3, 2*posY + PicHeight + 3, 2*posX + 2*PicWidth - 2, 2*posY + 2*PicHeight - 2);
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RectF rectF = new RectF(rect);
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canvas.drawRoundRect(rectF, 10f, 10f, paint);
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canvas.drawBitmap(bmp, 2*posX + PicWidth, 2*posY + PicHeight, null);
- canvas.restore();
- }
- }
- }