android 如何重写imageview 让图片有圆角效果 方法1:自定义view,使用BitmapShader首先自定义一些view的属性下面定义了一个枚举和一个圆角的大小borderRadius。xml version=\"1.0\"encoding=\"utf-8?自定义View代码如下public class RoundImageView extends ImageView{图片的类型,圆形or圆角*/private int type;private static final int TYPE_CIRCLE=0;private static final int TYPE_ROUND=1;圆角大小的默认值*/private static final int BODER_RADIUS_DEFAULT=10;圆角的大小*/private int mBorderRadius;绘图的Paint*/private Paint mBitmapPaint;圆角的半径*/private int mRadius;3x3 矩阵,主要用于缩小放大*/private Matrix mMatrix;渲染图像,使用图像为绘制图形着色*/private BitmapShader mBitmapShader;view的宽度*/private int mWidth;private RectF mRoundRect;public RoundImageView(Context context,AttributeSet attrs){super(context,attrs);mMatrix=new Matrix();mBitmapPaint=new Paint();mBitmapPaint.setAntiAlias(true);TypedArray a=context.obtainStyledAttributes(attrs,R.styleable.RoundImageView);mBorderRadius=a.getDimensionPixelSizeR.styleable。.
用canvas画只有一个角是圆角的矩形,能画出来么 您好,您用用这个方法:float[]radii={12f,12f,0f,0f,0f,0f,0f,0f};path.addRoundRect(new RectF(0,0,50,50),radii,Path.Direction.CW);canvas.drawPath(path,paint);
如何将imageview设置为圆角 1、在布局xml文件中写入以下代码:android:color=\"#ff000000\"/>;android:top=\"1dpandroid:right=\"1dpandroid:bottom=\"1dp\"/>;2、创建矩形视图view:public static Bitmap getRoundedCornerBitmap(Bitmap bitmap){Bitmap output=Bitmap.createBitmap(bitmap.getWidth(),bitmap.getHeight(),Config.ARGB_8888);Canvas canvas=new Canvas(output);创建布局final int color=0xff424242;设置颜色值final Paint paint=new Paint();初始化画刷final Rect rect=new Rect(0,0,bitmap.getWidth(),bitmap.getHeight());创建矩形位图final RectF rectF=new RectF(rect);矩形位图填充final float roundPx=12;设置圆角的半径paint.setAntiAlias(true);设置最表周canvas.drawARGB(0,0,0,0);设置rgb颜色为白色paint.setColor(color);设置颜色canvas.drawRoundRect(rectF,roundPx,roundPx,paint);设置矩形颜色paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));设置读入模式canvas.drawBitmap(bitmap,rect,rect,paint);绘制位图return output;}
android 怎么设置自定义alertdialog圆角
android里面如何填充矩形呢? Paint.setStyle(Style.FILL);这样画出来的矩形是有颜色填充的;而Paint.setStyle(Style.STROKE);画出来的矩形是空心的我只知道这些
android图片圆角怎么简单高效实现? android 图片圆角要怎么搞?有没有一个简单且高效的方法-比如用cardview或样式直接实现。代码实现的圆角当大量图片时会不会很慢?。。
Android如何纯java代码实现字体阴影效果 Android实现纯java代码字体阴影效果,主要是通过activity的draw方法,进行重新绘制,如下代码:package canvas.test;import android.app.Activity;import android.os.Bundle;import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.PorterDuff;import android.graphics.PorterDuff.Mode;import android.graphics.PorterDuffXfermode;import android.graphics.Rect;import android.graphics.RectF;import android.graphics.drawable.Drawable;import android.view.View;public class ShaderEffect extends Activity {Overridepublic void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(new ImageEffect(this));}class ImageEffect extends View{Paint paint;public ImageEffect(Context context){super(context);paint=new Paint();初始化画笔,为后面阴影效果使用。paint.setAntiAlias(true);去除锯齿。paint.setShadowLayer(5f,5.0f,5.0f,。