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, 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, 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 / 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, radius - mBorderWidth / 6.0f, mPaintBorder); canvas.translate(mBorderWidth, mBorderWidth); canvas.drawCircle(radius - mBorderWidth, radius - mBorderWidth, radius, 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、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" />
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。