圆形的头像

最新推荐文章于 2020-05-26 03:22:40 发布

stevenzqzq

最新推荐文章于 2020-05-26 03:22:40 发布

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分类专栏： Android

本文链接：https://blog.youkuaiyun.com/qq_26296197/article/details/51250913

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方式1,这样的写法没有定义原形图的边框和边框颜色

package com.pc.jiyuan.flashpage;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.widget.ImageView;

import com.zhy.view.RoundImageDrawable;

public class RoundImageDrawableActivity extends Activity
{

	@Override
	protected void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		Bitmap bitmap = BitmapFactory.decodeResource(getResources(),
				R.drawable.mv);
		ImageView iv = (ImageView) findViewById(R.id.id_one);
		iv.setImageDrawable(new RoundImageDrawable(bitmap));
		iv = (ImageView) findViewById(R.id.id_two);
		iv.setImageDrawable(new RoundImageDrawable(bitmap));

	}


}

工具类

package com.pc.jiyuan.flashpage;

import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.RectF;
import android.graphics.Shader.TileMode;
import android.graphics.drawable.Drawable;

public class RoundImageDrawable extends Drawable
{

	private Paint mPaint;
	private Bitmap mBitmap;

	private RectF rectF;

	public RoundImageDrawable(Bitmap bitmap)
	{
		mBitmap = bitmap;
		BitmapShader bitmapShader = new BitmapShader(bitmap, TileMode.CLAMP,
				TileMode.CLAMP);
		mPaint = new Paint();
		mPaint.setAntiAlias(true);
		mPaint.setShader(bitmapShader);
	}

	@Override
	public void setBounds(int left, int top, int right, int bottom)
	{
		super.setBounds(left, top, right, bottom);
		rectF = new RectF(left, top, right, bottom);
	}

	@Override
	public void draw(Canvas canvas)
	{
		canvas.drawRoundRect(rectF, 30, 30, mPaint);
	}

	@Override
	public int getIntrinsicWidth()
	{
		return mBitmap.getWidth();
	}

	@Override
	public int getIntrinsicHeight()
	{
		return mBitmap.getHeight();
	}

	@Override
	public void setAlpha(int alpha)
	{
		mPaint.setAlpha(alpha);
	}

	@Override
	public void setColorFilter(ColorFilter cf)
	{
		mPaint.setColorFilter(cf);
	}

	@Override
	public int getOpacity()
	{
		return PixelFormat.TRANSLUCENT;
	}

}

第二种写法是在

xml文件中

<自定义文件的包名加类名

。。。。

示例代码：

MainActivcity

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
}

工具类

/**
 * Created by Administrator on 2016/4/27 0027.
 */
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.NinePatchDrawable;
import android.util.AttributeSet;
import android.util.Log;
import android.widget.ImageView;


/**
 * 圆形ImageView，可设置最多两个宽度不同且颜色不同的圆形边框。
 * 设置颜色在xml布局文件中由自定义属性配置参数指定
 */
public class RoundImageView extends ImageView {
        private int mBorderThickness = 0;
        private Context mContext;
        private int defaultColor = 0xFFFFFFFF;
        // 如果只有其中一个有值，则只画一个圆形边框
        private int mBorderOutsideColor = 0;
        private int mBorderInsideColor = 0;
        // 控件默认长、宽
        private int defaultWidth = 0;
        private int defaultHeight = 0;

        public RoundImageView(Context context) {
                super(context);
                mContext = context;
        }

        public RoundImageView(Context context, AttributeSet attrs) {
                super(context, attrs);
                mContext = context;
                setCustomAttributes(attrs);
        }

        public RoundImageView(Context context, AttributeSet attrs, int defStyle) {
                super(context, attrs, defStyle);
                mContext = context;
                setCustomAttributes(attrs);
        }

        private void setCustomAttributes(AttributeSet attrs) {
                TypedArray a = mContext.obtainStyledAttributes(attrs,R.styleable.roundedimageview);
                mBorderThickness = a.getDimensionPixelSize(R.styleable.roundedimageview_border_thickness, 0);
                mBorderOutsideColor = a.getColor(R.styleable.roundedimageview_border_outside_color,defaultColor);
                mBorderInsideColor = a.getColor(R.styleable.roundedimageview_border_inside_color, defaultColor);
        }

        @Override
        protected void onDraw(Canvas canvas) {
                Drawable drawable = getDrawable() ;
                if (drawable == null) {
                        return;
                }
                if (getWidth() == 0 || getHeight() == 0) {
                        return;
                }
                this.measure(0, 0);
                if (drawable.getClass() == NinePatchDrawable.class)
                        return;
                Bitmap b = ((BitmapDrawable) drawable).getBitmap();
                Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888, true);
                if (defaultWidth == 0) {
                        defaultWidth = getWidth();
                }
                if (defaultHeight == 0) {
                        defaultHeight = getHeight();
                }
                int radius = 0;
                if (mBorderInsideColor != defaultColor && mBorderOutsideColor != defaultColor) {// 定义画两个边框，分别为外圆边框和内圆边框
                        radius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2 - 2 * mBorderThickness;
                        // 画内圆
                        drawCircleBorder(canvas, radius + mBorderThickness / 2,mBorderInsideColor);
                        // 画外圆
                        drawCircleBorder(canvas, radius + mBorderThickness + mBorderThickness / 2, mBorderOutsideColor);
                } else if (mBorderInsideColor != defaultColor && mBorderOutsideColor == defaultColor) {// 定义画一个边框
                        radius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2 - mBorderThickness;
                        drawCircleBorder(canvas, radius + mBorderThickness / 2, mBorderInsideColor);
                } else if (mBorderInsideColor == defaultColor && mBorderOutsideColor != defaultColor) {// 定义画一个边框
                        radius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2 - mBorderThickness;
                        drawCircleBorder(canvas, radius + mBorderThickness / 2, mBorderOutsideColor);
                } else {// 没有边框
                        radius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2;
                }
                Bitmap roundBitmap = getCroppedRoundBitmap(bitmap, radius);
                canvas.drawBitmap(roundBitmap, defaultWidth / 2 - radius, defaultHeight / 2 - radius, null);
        }

        /**
         * 获取裁剪后的圆形图片
         * @param
         */
        public Bitmap getCroppedRoundBitmap(Bitmap bmp, int radius) {
                Bitmap scaledSrcBmp;
                int diameter = radius * 2;
                // 为了防止宽高不相等，造成圆形图片变形，因此截取长方形中处于中间位置最大的正方形图片
                int bmpWidth = bmp.getWidth();
                int bmpHeight = bmp.getHeight();
                int squareWidth = 0, squareHeight = 0;
                int x = 0, y = 0;
                Bitmap squareBitmap;
                if (bmpHeight > bmpWidth) {// 高大于宽
                        squareWidth = squareHeight = bmpWidth;
                        x = 0;
                        y = (bmpHeight - bmpWidth) / 2;
                        // 截取正方形图片
                        squareBitmap = Bitmap.createBitmap(bmp, x, y, squareWidth, squareHeight);
                } else if (bmpHeight < bmpWidth) {// 宽大于高
                        squareWidth = squareHeight = bmpHeight;
                        x = (bmpWidth - bmpHeight) / 2;
                        y = 0;
                        squareBitmap = Bitmap.createBitmap(bmp, x, y, squareWidth,squareHeight);
                } else {
                        squareBitmap = bmp;
                }
                if (squareBitmap.getWidth() != diameter || squareBitmap.getHeight() != diameter) {
                        scaledSrcBmp = Bitmap.createScaledBitmap(squareBitmap, diameter,diameter, true);
                } else {
                        scaledSrcBmp = squareBitmap;
                }
                Bitmap output = Bitmap.createBitmap(scaledSrcBmp.getWidth(),
                        scaledSrcBmp.getHeight(),
                        Config.ARGB_8888);
                Canvas canvas = new Canvas(output);

                Paint paint = new Paint();
                Rect rect = new Rect(0, 0, scaledSrcBmp.getWidth(),scaledSrcBmp.getHeight());

                paint.setAntiAlias(true);
                paint.setFilterBitmap(true);
                paint.setDither(true);
                canvas.drawARGB(0, 0, 0, 0);
                canvas.drawCircle(scaledSrcBmp.getWidth() / 2,
                        scaledSrcBmp.getHeight() / 2,
                        scaledSrcBmp.getWidth() / 2,
                        paint);
                paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
                canvas.drawBitmap(scaledSrcBmp, rect, rect, paint);
                bmp = null;
                squareBitmap = null;
                scaledSrcBmp = null;
                return output;
        }

        /**
         * 边缘画圆
         */
        private void drawCircleBorder(Canvas canvas, int radius, int color) {
                Paint paint = new Paint();
        /* 去锯齿 */
                paint.setAntiAlias(true);
                paint.setFilterBitmap(true);
                paint.setDither(true);
                paint.setColor(color);
        /* 设置paint的　style　为STROKE：空心 */
                paint.setStyle(Paint.Style.STROKE);
        /* 设置paint的外框宽度 */
                paint.setStrokeWidth(mBorderThickness);
                canvas.drawCircle(defaultWidth / 2, defaultHeight / 2, radius, paint);
        }
}

在Values中创建attr.xml文件

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <declare-styleable name="roundedimageview">
        <attr name="border_thickness" format="dimension" />
        <attr name="border_inside_color" format="color" />
        <attr name="border_outside_color" format="color"></attr>
    </declare-styleable>
</resources>

主xml文件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:imagecontrol="http://schemas.android.com/apk/res-auto"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="horizontal"
    >

    <!-- 没有指定圆形ImageView属性时，默认没有外边圆颜色 -->
    <!-- 需要将图片资源自定为src ，或在程序中setImageResource(res) 不能设置background为图片，这样不能达到圆形效果-->
    <com.example.administrator.myapplication.RoundImageView
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:src="@drawable/img"
        />
    <!-- border_outside_color 外部圆圈的颜色 -->
    <!-- border_inside_color 内部部圆圈的颜色 -->
    <!-- border_thickness 外圆和内圆的宽度 -->
    <com.example.administrator.myapplication.RoundImageView
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:src="@drawable/img"
        imagecontrol:border_inside_color="#bc0978"
        imagecontrol:border_outside_color="#ba3456"
        imagecontrol:border_thickness="1dp"
        />
</LinearLayout>

总结：

第二种写法比较常见，第一种方法也可以实现效果，代码量要少些，看个人情况去选择