<?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>

** * 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;//构造方法，参数上下文    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     *///    radius半径    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;    }    /**     * 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);    }}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:imagecontrol="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_main"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.example.ceshi.MainActivity">    <Button        android:id="@+id/aaa"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="点击设置头像" />    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:orientation="horizontal">        <com.example.ceshi.RoundImageView            android:id="@+id/image"            android:layout_width="0dp"            android:layout_weight="1"            android:layout_height="wrap_content" />        <!-- 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.ceshi.RoundImageView            android:id="@+id/img2"            android:layout_width="0dp"            android:layout_weight="1"            android:layout_height="wrap_content"            imagecontrol:border_inside_color="#bc0978"            imagecontrol:border_outside_color="#ba3456"            imagecontrol:border_thickness="1dp" />    </LinearLayout>

public class MainActivity extends AppCompatActivity {    private Button bt;    private static final int PHOTO_REQUEST_GALLERY = 2;// 从相册中选择    private static final int PHOTO_REQUEST_CUT = 3;// 结果    private ImageView photo,photo2;    private File tempFile;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        photo= (ImageView) findViewById(R.id.image);        photo2= (ImageView) findViewById(R.id.img2);        bt = (Button) findViewById(R.id.aaa);        bt.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {//                Intent intent=new Intent(Intent.ACTION_PICK);//                intent.setType("image/*");//                startActivityForResult(intent,PHOTO_REQUEST_GALLERY);                // 激活系统图库，选择一张图片                Intent intent = new Intent(Intent.ACTION_PICK);                intent.setType("image/*");                // 开启一个带有返回值的Activity，请求码为PHOTO_REQUEST_GALLERY                startActivityForResult(intent, PHOTO_REQUEST_GALLERY);            }        });    }    /*            * 剪切图片            */    private void crop(Uri uri) {        // 裁剪图片意图        Intent intent = new Intent("com.android.camera.action.CROP");        intent.setDataAndType(uri, "image/*");        intent.putExtra("crop", "true");        // 裁剪框的比例，1：1        intent.putExtra("aspectX", 1);        intent.putExtra("aspectY", 1);        // 裁剪后输出图片的尺寸大小        intent.putExtra("outputX", 250);        intent.putExtra("outputY", 250);        intent.putExtra("outputFormat", "JPEG");// 图片格式        intent.putExtra("noFaceDetection", true);// 取消人脸识别        intent.putExtra("return-data", true);        // 开启一个带有返回值的Activity，请求码为PHOTO_REQUEST_CUT        startActivityForResult(intent, PHOTO_REQUEST_CUT);    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        if (requestCode == PHOTO_REQUEST_GALLERY) {            // 从相册返回的数据            if (data != null) {                // 得到图片的全路径                Uri uri = data.getData();                crop(uri);            }        } else if (requestCode == PHOTO_REQUEST_CUT) {            // 从剪切图片返回的数据            if (data != null) {                Bitmap bitmap = data.getParcelableExtra("data");                photo.setImageBitmap(bitmap);                photo2.setImageBitmap(bitmap);            }            try {                // 将临时文件删除                tempFile.delete();            } catch (Exception e) {                e.printStackTrace();            }        }        super.onActivityResult(requestCode, resultCode, data);    }}