下面是我的扩展
ImageView的RoundedImageView类:
public class RoundedImageView extends ImageView { public RoundedImageView(Context context) { super(context); // TODO Auto-generated constructor stub } public RoundedImageView(Context context,AttributeSet attrs) { super(context,attrs); } public RoundedImageView(Context context,AttributeSet attrs,int defStyle) { super(context,attrs,defStyle); } @Override protected void onDraw(Canvas canvas) { Drawable drawable = getDrawable(); if (drawable == null) { return; } if (getWidth() == 0 || getHeight() == 0) { return; } Bitmap b = ((BitmapDrawable)drawable).getBitmap() ; Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888,true); int w = getWidth(),h = getHeight(); Bitmap roundBitmap = getCroppedBitmap(bitmap,w); // roundBitmap= ImageUtils.setCircularInnerGlow(roundBitmap,0xFFBAB399,4,1); canvas.drawBitmap(roundBitmap,null); } public static Bitmap getCroppedBitmap(Bitmap bmp,int radius) { Bitmap sbmp; if(bmp.getWidth() != radius || bmp.getHeight() != radius) sbmp = Bitmap.createScaledBitmap(bmp,radius,false); else sbmp = bmp; Bitmap output = Bitmap.createBitmap(sbmp.getWidth(),sbmp.getHeight(),Config.ARGB_8888); Canvas canvas = new Canvas(output); final int color = 0xffa19774; final Paint paint = new Paint(); final Rect rect = new Rect(0,sbmp.getWidth(),sbmp.getHeight()); paint.setAntiAlias(true); paint.setFilterBitmap(true); paint.setDither(true); canvas.drawARGB(0,0); paint.setColor(Color.parseColor("#BAB399")); canvas.drawCircle(sbmp.getWidth() / 2+0.7f,sbmp.getHeight() / 2+0.7f,sbmp.getWidth() / 2+0.1f,paint); paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN)); canvas.drawBitmap(sbmp,rect,paint); return output; }
我的xml代码是:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" > <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_centerInParent="true" android:orientation="horizontal" > <com.example.scaletypedemo.RoundedImageView android:layout_marginLeft="30dp" android:layout_width="100dp" android:layout_height="100dp" android:layout_centerInParent="true" android:scaleType="centerCrop" android:src="@drawable/a" android:adjustViewBounds="true" /> <ImageView android:layout_marginLeft="50dp" android:layout_width="100dp" android:layout_height="100dp" android:scaleType="centerCrop" android:src="@drawable/a" /> </LinearLayout> </RelativeLayout>
所以,问题是,如果我使用ImageView,显示的图像不会被拉伸但是如果我使用相同的图像并将其显示在RoundedImageView中并保持所有属性相同;图像被拉伸,如下面的屏幕截图所示:
请帮助防止RoundedImageView中显示的图像拉伸………..我在这一点上非常困难.
编辑:应用正红的解决方案后,它解决了拉伸问题,但后来没有显示完整的一轮.
提前致谢!!!
解决方法
您应该按宽度/高度速率调整位图大小.
—- —- EDITED
这将是一种更灵活的方式.
@Override protected void onDraw(Canvas canvas) { Drawable drawable = getDrawable(); if (drawable == null) { return; } if (getWidth() == 0 || getHeight() == 0) { return; } Bitmap b = ((BitmapDrawable) drawable).getBitmap(); Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888,h = getHeight(); int radius = w < h ? w : h; Bitmap roundBitmap = getCroppedBitmap(bitmap,w,h); // roundBitmap= ImageUtils.setCircularInnerGlow(roundBitmap,// 4,int radius,int w,int h) { Bitmap sbmp; if (bmp.getWidth() != radius || bmp.getHeight() != radius) { float _w_rate = 1.0f * radius / bmp.getWidth(); float _h_rate = 1.0f * radius / bmp.getHeight(); float _rate = _w_rate < _h_rate ? _h_rate : _w_rate; sbmp = Bitmap.createScaledBitmap(bmp,(int)(bmp.getWidth() * _rate),(int)(bmp.getHeight() * _rate),false); } else sbmp = bmp; Bitmap output = Bitmap.createBitmap(sbmp.getWidth(),0); paint.setColor(Color.parseColor("#BAB399")); canvas.drawCircle(w / 2,h / 2,(w < h ? w : h) / 2,paint); return output; }