圆形ImageView

自定义控件实现圆形ImageView

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Color;
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.util.AttributeSet;
import android.widget.ImageView;

/**
* 作者：${孙淇文} on 2016/6/16 14:16
* 邮箱：nice_sqw@163.com
*/
public class MyRoundedImageView  extends ImageView{

//
//    //中间值用来设置用户头像的颜色
public int BACK_DEFAULT = Color.parseColor("#95d3f5");

//当前的用户的名字
public String username = "";

//设置当前的字段内容
public void addTile(String username) {
this.username = username;
invalidate();
}

//设置字体颜色的
public void addTile(String username, int namecolor) {
this.username = username;
this.BACK_DEFAULT = namecolor;
invalidate();
}

public MyRoundedImageView(Context context) {
super(context);
// TODO Auto-generated constructor stub
}

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

public MyRoundedImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}

@Override
protected void onDraw(Canvas canvas) {
Paint line = new Paint();
line.setColor(Color.WHITE);
line.setTextSize(getWidth() / 2);
line.setTextAlign(Paint.Align.CENTER);
Paint.FontMetrics fontMetrics = line.getFontMetrics();

//计算文字高度
float fontHeight = fontMetrics.bottom - fontMetrics.top;
//计算文字baseline
float textBaseY = getHeight() - (getHeight() - fontHeight) / 2 - fontMetrics.bottom;

canvas.drawText("", getWidth() / 4, getHeight() / 2 + getWidth() / 4, line);

int w = getWidth(), h = getHeight();
//画圆圈的画笔
Paint circle = new Paint();
circle.setColor(BACK_DEFAULT);
circle.setStrokeWidth(w / 2); //设置圆环的宽度
circle.setAntiAlias(true);  //消除锯齿

Drawable drawable = getDrawable();
if (drawable == null) {
return;
}
if (getWidth() == 0 || getHeight() == 0) {
return;
}

if (!"".equals(username) && null != username) {

//画自定义的圆
canvas.drawCircle(getWidth() / 2, getWidth() / 2, getWidth() / 2, circle);

if (username.length() > 0) {

Rect targetRect = new Rect(50, 50, 1000, 200);

float strwidth = line.measureText(username.substring(0, 1));
Paint.FontMetrics fm = line.getFontMetrics();
float hight = (float) Math.ceil(fm.descent - fm.ascent);

if (username.substring(0, 1).matches("^[a-zA-Z]*")) {
if (username.length() >= 2) {
strwidth = line.measureText(username.substring(0, 1));
if (username.substring(0, 2).matches("^[a-zA-Z]*")) {
//                            strwidth = line.measureText(username.substring(0, 2));
//                            canvas.drawLine(0, (float) ((getHeight()) / 2 - (hight / 2) * 0.7), getWidth(), (float) ((getHeight()) / 2 - (hight / 2) * 0.7), line);
//                            canvas.drawLine(0, (getHeight()) / 2, getWidth(), (getHeight()) / 2, line);
//                            canvas.drawLine(0, (float) ((getHeight()) / 2 + (hight / 2) * 0.7), getWidth(), (float) ((getHeight()) / 2 + (hight / 2) * 0.7), line);
canvas.drawText(username.substring(0, 1), (getWidth()) / 2, (float) ((getHeight() - hight) / 2 + hight * 0.7), line);
} else {
canvas.drawText(username.substring(0, 1), getWidth() / 2, (float) ((getHeight() - hight) / 2 + hight * 0.7), line);
}

} else {
canvas.drawText(username.substring(0, 1), (getWidth()) / 2, (float) ((getHeight() - hight) / 2 + hight * 0.7), line);

}
} else {
canvas.drawText(username.substring(0, 1), (getWidth()) / 2, (getHeight()) / 2 + hight / 4, line);

}

} else {
canvas.drawText("", getWidth() / 4, (float) ((getHeight() / 4) * 2.8), line);

}

} else {
BitmapDrawable bd = (BitmapDrawable) drawable;
Bitmap b = bd.getBitmap();
Bitmap bitmap = b.copy(Config.ARGB_8888, true);

Bitmap roundBitmap = getCroppedBitmap(bitmap, w);
canvas.drawBitmap(roundBitmap, 0, 0, null);
canvas.drawText("", getWidth() / 4, getHeight() / 2 + getWidth() / 4 - 20, line);
}
}

public static Bitmap getCroppedBitmap(Bitmap bmp, int radius) {
Bitmap sbmp;
if (bmp.getWidth() != radius || bmp.getHeight() != radius)
sbmp = Bitmap.createScaledBitmap(bmp, radius, radius, false);
else
sbmp = bmp;
Bitmap output = Bitmap.createBitmap(sbmp.getWidth(),
sbmp.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(output);

final int color = 0xffa19774;
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, sbmp.getWidth(), sbmp.getHeight());

paint.setAntiAlias(true);
paint.setFilterBitmap(true);
paint.setDither(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(Color.parseColor("#BAB399"));
canvas.drawCircle(sbmp.getWidth() / 2 + 0.7f, sbmp.getHeight() / 2 + 0.7f,
sbmp.getWidth() / 2 + 0.1f, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(sbmp, rect, rect, paint);

return output;
}

//获取文字的高度的方法
public int getHigh(float fontSize) {
Paint paint = new Paint();
paint.setTextSize(fontSize);
Paint.FontMetrics fm = paint.getFontMetrics();
return (int) Math.ceil(fm.descent - fm.ascent);
}

//获取文字的宽度的方法
public float getWidth(String displayText) {
Paint mTextPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mTextPaint.setColor(Color.WHITE);
// Define the string.
// Measure the width of the text string.
float textWidth = mTextPaint.measureText(displayText);

return textWidth;
}
}