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Android Studio实现带边框的圆形头像

2020年02月15日 作者：佚名

本文实例为大家分享了Android Studio实现带边框的圆形头像的具体代码，供大家参考，具体内容如下

效果显示：

(没有边框的)

 

(有边框的)

1、创建自定义ImagView控件

(1)、没有边框的

package chenglong.activitytest.pengintohospital.utils;

import android.content.Context;
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.Rect;
import android.graphics.Shader;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;

/**
 *
 * 圆形图片
 * Created by LICHENGLONG on 2017-10-09.
 */

public class mine_ImageViewPlus extends ImageView{
 private Paint mPaintBitmap = new Paint(Paint.ANTI_ALIAS_FLAG);
 private Paint mPaintBorder = new Paint(Paint.ANTI_ALIAS_FLAG);
 private Bitmap mRawBitmap;
 private BitmapShader mShader;
 private Matrix mMatrix = new Matrix();
 private float mBorderWidth = dip2px(15);
 private int mBorderColor = 0x80bebebe;

 public mine_ImageViewPlus(Context context,AttributeSet attrs) {
 super(context,attrs);
 }

 @Override
 protected void onDraw(Canvas canvas) {
 Bitmap rawBitmap = getBitmap(getDrawable());
 if (rawBitmap != null){
  int viewWidth = getWidth();
  int viewHeight = getHeight();
  int viewMinSize = Math.min(viewWidth,viewHeight);
  float dstWidth = viewMinSize;
  float dstHeight = viewMinSize;
  if (mShader == null || !rawBitmap.equals(mRawBitmap)){
  mRawBitmap = rawBitmap;
  mShader = new BitmapShader(mRawBitmap,Shader.TileMode.CLAMP,Shader.TileMode.CLAMP);
  }
  if (mShader != null){
  mMatrix.setScale((dstWidth - mBorderWidth * 2) / rawBitmap.getWidth(),(dstHeight - mBorderWidth * 2) / rawBitmap.getHeight());
  mShader.setLocalMatrix(mMatrix);
  }
  mPaintBitmap.setShader(mShader);
  mPaintBorder.setStyle(Paint.Style.STROKE);
  mPaintBorder.setStrokeWidth(mBorderWidth);
  mPaintBorder.setColor(mBorderColor);
  float radius = viewMinSize / 2.0f;
  canvas.drawCircle(radius,radius,radius - mBorderWidth / 2.0f,mPaintBorder);
  canvas.translate(mBorderWidth,mBorderWidth);
  canvas.drawCircle(radius - mBorderWidth,radius - mBorderWidth,mPaintBitmap);
 } else {
  super.onDraw(canvas);
 }
 }

 private Bitmap getBitmap(Drawable drawable){
 if (drawable instanceof BitmapDrawable){
  return ((BitmapDrawable)drawable).getBitmap();
 } else if (drawable instanceof ColorDrawable){
  Rect rect = drawable.getBounds();
  int width = rect.right - rect.left;
  int height = rect.bottom - rect.top;
  int color = ((ColorDrawable)drawable).getColor();
  Bitmap bitmap = Bitmap.createBitmap(width,height,Bitmap.Config.ARGB_8888);
  Canvas canvas = new Canvas(bitmap);
  canvas.drawARGB(Color.alpha(color),Color.red(color),Color.green(color),Color.blue(color));
  return bitmap;
 } else {
  return null;
 }
 }

 private int dip2px(int dipVal) {
 float scale = getResources().getDisplayMetrics().density;
 return (int)(dipVal * scale + 0.5f);
 }
}

(2)、有边框的

package chenglong.activitytest.pengintohospital.utils;

import android.content.Context;
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.Rect;
import android.graphics.Shader;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;

/**
 *
 * 带边框的圆形图片
 * Created by LICHENGLONG on 2017-10-09.
 */

public class ImageViewPlus extends ImageView{
 private Paint mPaintBitmap = new Paint(Paint.ANTI_ALIAS_FLAG);
 private Paint mPaintBorder = new Paint(Paint.ANTI_ALIAS_FLAG);//
 private Bitmap mRawBitmap;
 private BitmapShader mShader;
 private Matrix mMatrix = new Matrix();
 private float mBorderWidth = dip2px(15);
 private int mBorderColor = 0xFF0080FF;//外边框的颜色

 public ImageViewPlus(Context context,(dstHeight - mBorderWidth * 2) / rawBitmap.getHeight());
  mShader.setLocalMatrix(mMatrix);
  }
  mPaintBitmap.setShader(mShader);
  mPaintBorder.setStyle(Paint.Style.STROKE);
  mPaintBorder.setStrokeWidth(mBorderWidth / 5.0f);//外边框的大小
  mPaintBorder.setColor(mBorderColor);//添加外边框
  float radius = viewMinSize / 2.0f;
  canvas.drawCircle(radius,radius - mBorderWidth / 6.0f,Color.blue(color));
  return bitmap;
 } else {
  return null;
 }
 }

 private int dip2px(int dipVal) {
 float scale = getResources().getDisplayMetrics().density;
 return (int)(dipVal * scale + 0.5f);
 }
}

2、创建页面xml代码

<chenglong.activitytest.pengintohospital.utils.ImageViewPlus
 android:id="@+id/mine_iv_headportrait"
 android:layout_width="150dp"
 android:layout_height="150dp"
 android:src="@mipmap/hospital" />

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