Android 第三方RoundedImageView设置各种圆形、方形头像
Android 自定义CoolImageView实现QQ首页背景图片动画效果


一.第三方RoundedImageView
1.在Android Studio中,可进入模块设置中添加库依赖。 进入Module结构设置添加库依赖 ,输入RoundedImageView然后搜索添加
2.在Moudle的build.gradle中添加如下代码,添加完之后在Build中进行下Make Module操作(编译下Module),使自己添加的依赖生效
repositories {
    mavenCentral()
}
dependencies {
    compile 'com.makeramen:roundedimageview:2.2.1'
}3.添加相关属性:
控件属性: 
riv_border_width: 边框宽度 
riv_border_color: 边框颜色 
riv_oval: 是否圆形 
riv_corner_radius: 圆角弧度 
riv_corner_radius_top_left:左上角弧度 
riv_corner_radius_top_right: 右上角弧度 
riv_corner_radius_bottom_left:左下角弧度 
riv_corner_radius_bottom_right:右下角弧度4.示例布局:
 <com.makeramen.roundedimageview.RoundedImageView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:src="@mipmap/avatar"
          app:riv_border_color="#333333"
          app:riv_border_width="2dp"
          app:riv_oval="true" />
    <com.makeramen.roundedimageview.RoundedImageView
          xmlns:app="http://schemas.android.com/apk/res-auto"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:scaleType="fitCenter"
          android:src="@mipmap/avatar"
          app:riv_border_color="#333333"
          app:riv_border_width="2dp"
          app:riv_corner_radius="10dp"
          app:riv_mutate_background="true"
          app:riv_oval="false"
          app:riv_tile_mode="repeat" />
    <com.makeramen.roundedimageview.RoundedImageView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:scaleType="fitCenter"
          android:src="@mipmap/avatar"
          app:riv_border_color="#333333"
          app:riv_border_width="2dp"
          app:riv_corner_radius_top_left="25dp"
          app:riv_corner_radius_bottom_right="25dp"
          app:riv_mutate_background="true"
          app:riv_oval="false"
          app:riv_tile_mode="repeat" />
   <com.makeramen.roundedimageview.RoundedImageView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:scaleType="fitCenter"
          android:src="@mipmap/avatar"
          app:riv_border_color="#333333"
          app:riv_border_width="2dp"
          app:riv_corner_radius_top_right="25dp"
          app:riv_corner_radius_bottom_left="25dp"
          app:riv_mutate_background="true"
          app:riv_oval="false"
          app:riv_tile_mode="repeat" />
   <com.makeramen.roundedimageview.RoundedImageView
          android:layout_width="96dp"
          android:layout_height="72dp"
          android:scaleType="center"
          android:src="@mipmap/avatar"
          app:riv_border_color="#333333"
          app:riv_border_width="2dp"
          app:riv_corner_radius="25dp"
          app:riv_mutate_background="true"
          app:riv_oval="true"
          app:riv_tile_mode="repeat" />
 <com.makeramen.roundedimageview.RoundedImageView
            android:id="@+id/imCompanyHeadItem"
            android:layout_width="50dp"
            android:layout_marginTop="10dp"
            android:layout_marginRight="6.5dp"
            android:layout_marginLeft="6.5dp"
            android:src="@drawable/head_home"
            android:layout_gravity="center"
            android:layout_height="50dp"
            app:riv_border_color="@color/_c7ced8"
            app:riv_border_width="1dp"
            app:riv_corner_radius_top_left="5dp"
            app:riv_corner_radius_bottom_right="5dp"
            app:riv_corner_radius_bottom_left="5dp"
            app:riv_corner_radius_top_right="5dp"
            app:riv_mutate_background="true"
            app:riv_oval="false"
            app:riv_tile_mode="repeat"/>二.自定义RoundImageView

1.布局:
 <com.iruiyou.pet.utils.RoundImageView
                        android:id="@+id/headIv"
                        android:layout_width="125dp"
                        android:layout_height="125dp"
                        android:layout_marginTop="92dp"
                        android:src="@drawable/head_home"
                        loonggg:border_incolor="#000fff"
                        loonggg:border_outcolor="#fff000"
                        loonggg:border_width="10dp"
                        app:layout_constraintLeft_toLeftOf="parent"
                        app:layout_constraintRight_toRightOf="parent"
                        app:layout_constraintTop_toTopOf="parent"/>2.自定义类:
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff;
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.widget.ImageView;
import com.iruiyou.pet.R;
/**
 *
 * @author sgf
 * 自定义圆形头像
 *
 */
public class RoundImageView extends ImageView {
private int mBorderThickness = 0;
private Context mContext;
private int defaultColor = 0xFFFFFFFF;
// 外圆边框颜色
private int mBorderOutsideColor = 0;
// 内圆边框颜色
private int mBorderInsideColor = 0;
// RoundImageView控件默认的长、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;
// 设置RoundImageView的属性值,比如颜色,宽度等
        setRoundImageViewAttributes(attrs);
    }
public RoundImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
        mContext = context;
        setRoundImageViewAttributes(attrs);
    }
// 从attr.xml文件中获取属性值,并给RoundImageView设置
private void setRoundImageViewAttributes(AttributeSet attrs) {
        TypedArray a = mContext.obtainStyledAttributes(attrs,
                R.styleable.round_image_view);
        mBorderThickness = a.getDimensionPixelSize(
                R.styleable.round_image_view_border_width, 0);
        mBorderOutsideColor = a.getColor(
                R.styleable.round_image_view_border_outcolor, defaultColor);
        mBorderInsideColor = a.getColor(
                R.styleable.round_image_view_border_incolor, defaultColor);
        a.recycle();
    }
// 具体解释:比如我自定义一个控件,怎么实现呢,以RoundImageView为例,首先是继承ImageView,然后实现其构造函数,在构造函数中,获取attr中的属性值(再次解释:这里获取的具体的这个属性的值是怎么来的呢?比如颜色和宽度,这个在attr.xml中定义了相关的名字,而在使用RoundImageView的xml布局文件中,我们会设置其值,这里需要用的值,就是从那里设置的),并设置在本控件中,然后继承onDraw方法,画出自己想要的图形或者形状即可
/**
     * 这个是继承的父类的onDraw方法
     *
     * onDraw和下面的方法不用管,基本和学习自定义没关系,就是实现怎么画圆的,你可以改变下面代码试着画三角形头像,哈哈
     */
@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;
// 这里的判断是如果内圆和外圆设置的颜色值不为空且不是默认颜色,就定义画两个圆框,分别为内圆和外圆边框
if (mBorderInsideColor != defaultColor
                && mBorderOutsideColor != defaultColor) {
            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) {// 这里的是如果内圆边框不为空且颜色值不是默认值,就画一个内圆的边框
            radius = (defaultWidth < defaultHeight ? defaultWidth
                    : defaultHeight) / 2 - mBorderThickness;
            drawCircleBorder(canvas, radius + mBorderThickness / 2,
                    mBorderInsideColor);
        } else if (mBorderInsideColor == defaultColor
                && mBorderOutsideColor != defaultColor) {// 这里的是如果外圆边框不为空且颜色值不是默认值,就画一个外圆的边框
            radius = (defaultWidth < defaultHeight ? defaultWidth
                    : defaultHeight) / 2 - mBorderThickness;
            drawCircleBorder(canvas, radius + mBorderThickness / 2,
                    mBorderOutsideColor);
        } else {// 这种情况是没有设置属性颜色的情况下,即没有边框的情况
            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 bmp
     * @param radius
     *            半径
     * @return
     */
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(), Bitmap.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(PorterDuff.Mode.SRC_IN));
        canvas.drawBitmap(scaledSrcBmp, rect, rect, paint);
        bmp = null;
        squareBitmap = null;
        scaledSrcBmp = null;
return output;
    }
/**
     * 画边缘的圆,即内圆或者外圆
     */
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);
    }
}3.res--values--attrs.xml文件
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="round_image_view">
<attr name="border_width" format="dimension" />
<attr name="border_incolor" format="color" />
<attr name="border_outcolor" format="color"></attr>
</declare-styleable>
</resources>三.第三方NiceImageView
1.效果图如下:

2.特点:
基于AppCompatImageView扩展
支持圆角、圆形显示
可绘制边框,圆形时可绘制内外两层边框
支持边框不覆盖图片
可绘制遮罩
3.基本用法:
 1. 添加JitPack仓库 在项目根目录下的 build.gradle 中添加仓库:
allprojects {
    repositories {
        ...
        maven { url "https://jitpack.io" }
    }
}2. 添加项目依赖
dependencies {
implementation 'com.github.SheHuan:NiceImageView:1.0.5'
}3. 在布局文件中添加CornerLabelView
<com.shehuan.niv.NiceImageView
    android:layout_width="200dp"
    android:layout_height="200dp"
    android:layout_marginTop="10dp"
    android:src="@drawable/cat"
    app:border_color="#FF7F24"
    app:border_width="4dp"
    app:is_circle="true" />4.支持的属性、方法
| 属性名 | 含义 | 默认值 | 对应方法 | 
|---|---|---|---|
| is_circle | 是否显示为圆形(默认为矩形) | false | isCircle() | 
| corner_top_left_radius | 左上角圆角半径 | 0dp | setCornerTopLeftRadius() | 
| corner_top_right_radius | 右上角圆角半径 | 0dp | setCornerTopRightRadius() | 
| corner_bottom_left_radius | 左下角圆角半径 | 0dp | setCornerBottomLeftRadius() | 
| corner_bottom_right_radius | 右下角圆角半径 | 0dp | setCornerBottomRightRadius() | 
| corner_radius | 统一设置四个角的圆角半径 | 0dp | setCornerRadius() | 
| border_width | 边框宽度 | 0dp | setBorderWidth() | 
| border_color | 边框颜色 | #ffffff | setBorderColor() | 
| inner_border_width | 相当于内层边框(is_circle为true时支持) | 0dp | setInnerBorderWidth() | 
| inner_border_color | 内边框颜色 | #ffffff | setInnerBorderColor() | 
| is_cover_src | border、inner_border是否覆盖图片内容 | false | isCoverSrc() | 
| mask_color | 图片上绘制的遮罩颜色 | 不设置颜色则不绘制 | setMaskColor() | 
可参考:https://github.com/SheHuan/NiceImageView
5.其它:
如果你需要实现类似钉钉的圆形组合头像,例如:
可以先生成对应的Bitmap,并用圆形的 NiceImageView 显示即可。如何生成组合Bitmap可以参考这里:CombineBitmap
四.如果你的项目中只有圆形的图片而不需要设置圆角图片的话,可以试试下面的第三方:
https://github.com/hdodenhof/CircleImageView
https://github.com/open-android/RoundedImageView
 
			