Android新手自己写了一个RoundImage（继承ImageView，主要是将一张图片显示为圆的）

CoolEgos 2014-07-30 10:50:05

代码是这个：





import com.zf.example.R;



import android.content.Context;

import android.content.res.TypedArray;

import android.graphics.Bitmap;

import android.graphics.BitmapShader;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.Matrix;

import android.graphics.Paint;

import android.graphics.Shader;

import android.graphics.drawable.Drawable;

import android.util.AttributeSet;

import android.widget.ImageView;





/*

 *  自定义一个RoundImage，用于显示客户的图像

 *  主要的不同是图像是圆的

 * 

 * */

public class RoundImage extends ImageView {

	

	private Paint imagePaint = new Paint();    // 头像的画笔

	private Paint borderPaint = new Paint();   // 边框的画笔

	//private Matrix matrix = new Matrix();      // 

	private int imageRadius;          		   // 圆头像的半径

	private int borderRadius;  		  		   // 外边的边界半径

	private Bitmap mbitmap;                    // 头像

	private BitmapShader mbitmapShader;        // 渲染器，画一个带有渲染效果的图

	public RoundImage(Context context) {

		super(context);

		// TODO Auto-generated constructor stub

	}



	public RoundImage(Context context, AttributeSet attrs) {

		super(context, attrs);

		// TODO Auto-generated constructor stub

	}

	

	public RoundImage(Context context, AttributeSet attrs, int defStyle) {

		super(context, attrs, defStyle);

		// TODO Auto-generated constructor stub

		super.setScaleType(ScaleType.CENTER_CROP);

//		TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.RoundImage, defStyle, 0);

//		a.recycle();

		

		imagePaint.setColor(Color.GRAY);   //颜色  

		imagePaint.setStyle(Paint.Style.STROKE);  

		imagePaint.setStrokeWidth(1);

		//imagePaint.setShader(mbitmapShader);

		// 画边框

		borderPaint.setStyle(Paint.Style.STROKE);

        borderPaint.setAntiAlias(true);

        borderPaint.setColor(Color.RED);

        borderPaint.setStrokeWidth(5);

	}



	@Override

	protected void onDraw(Canvas canvas) {

		// TODO Auto-generated method stub

		// 可以自己任意画

		super.onDraw(canvas);

		// 渲染

		// mbitmapShader = new BitmapShader(mbitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP); 

		// 画头像 

        //canvas.drawRect(rec, paint);

        canvas.drawCircle(50, 50, 50, imagePaint);

        canvas.drawCircle(50, 50, 50, borderPaint);

        //this.draw(canvas);

	}

	

	

	@Override

	public void setImageDrawable(Drawable drawable) {

		// TODO Auto-generated method stub

		super.setImageDrawable(drawable);

	}



	@Override

	public void setImageBitmap(Bitmap bm) {

		// TODO Auto-generated method stub

		// 容器内设置图片

		super.setImageBitmap(bm);

	}



	@Override

	public void setImageResource(int resId) {

		// TODO Auto-generated method stub

		super.setImageResource(resId);

	}

	

	



	public void setBackground(int id){

		// 通过本地的设置圆头像的半径

	}



}