自定义圆角、圆形、边框View
项目用到不同背景颜色圆角、圆角大小不一样、不同背景圆形、是否带边框，边框大小不一样，导致项目样式XML文件很多，因此写个自定义View实现这些效果。代码如下：
1、自定义view
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.StateListDrawable;
import android.util.AttributeSet;
import android.util.Log;
import android.util.TypedValue;
import android.view.MotionEvent;
import android.view.View;
import android.widget.TextView;
import com.thirtydays.common.R;
import com.thirtydays.common.utils.DisplayUtil;
import com.thirtydays.common.utils.StringUtil;
/**
* Created by yanchengmeng on 2016/12/22.
* 自定义圆角、圆形、边框TextView
*/
public class RoundTextView extends View {
/**
* 文本内容
*/
private String mTitleText;
/**
* 文本的颜色
*/
private int mTitleTextColor;
/**
* 文本的大小
*/
private int mTitleTextSize;
/**
*背景颜色
*/
private int rtvBackgroundColor;
/**
* 圆角大小
*/
private float mCornerSize;
/**
* 绘制时控制文本绘制的范围
*/
private Rect mtitleBound;
private Paint mtitlePaint;
/**
* 是否带边框
*/
private boolean isWithBorder;
/**
* 边框大小
*/
private float borderWidth;
/**
* 边框颜色
*/
private int mBorderColor;
/**
* 是否是圆形
*/
private boolean isCirCle=false;
private int textLenght; // 文字长度
private String text; // 文字 解决没有设置设置文字，导致空指针异常
public RoundTextView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public RoundTextView(Context context) {
this(context, null);
}
/**
* 设置背景颜色
* @param rtvBackgroundColor
*/
public void setRtvBackgroundColor(int rtvBackgroundColor) {
this.rtvBackgroundColor = rtvBackgroundColor;
}
/**
* 设置文字颜色
* @param mTitleTextColor
*/
public void setmTitleTextColor(int mTitleTextColor) {
this.mTitleTextColor = mTitleTextColor;
}
/**
* 设置文字字体大小
* @param mTitleTextSize
*/
public void setmTitleTextSize(int mTitleTextSize) {
this.mTitleTextSize = mTitleTextSize;
}
/**
* 设置文字
* @param mTitleText
*/
public void setmTitleText(String mTitleText) {
this.mTitleText = mTitleText;
}
/**
* 设置圆角大小
* @param mCornerSize
*/
public void setmCornerSize(float mCornerSize) {
this.mCornerSize = mCornerSize;
}
/**
* 设置边框大小
* @param borderWidth
*/
public void setBorderWidth(float borderWidth) {
this.borderWidth = borderWidth;
}
/**
* 设置是否需要带上边框
* @param isWithBorder
*/
public void setIsWithBorder(boolean isWithBorder) {
this.isWithBorder = isWithBorder;
}
/**
* 设置边框颜色
* @param mBorderColor
*/
public void setmBorderColor(int mBorderColor) {
this.mBorderColor = mBorderColor;
}
/**
* 设置是否是圆形
* @param isCirCle
*/
public void setIsCirCle(boolean isCirCle) {
this.isCirCle = isCirCle;
}
/**
* 获得我自定义的样式属性
*
* @param context
* @param attrs
* @param defStyle
*/
public RoundTextView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
/**
* 获得我们所定义的自定义样式属性
*/
TypedArray a = context.getTheme().obtainStyledAttributes(attrs, R.styleable.RoundTextView, defStyle, 0);
mTitleText = a.getString(R.styleable.RoundTextView_rtvText);
rtvBackgroundColor = a.getColor(R.styleable.RoundTextView_rtvBackground, getResources().getColor(android.R.color.black));// 默认背景黑色
mTitleTextColor = a.getColor(R.styleable.RoundTextView_rtvTextColor, Color.WHITE); // 默认文字颜色黑色
mTitleTextSize = a.getDimensionPixelSize(R.styleable.RoundTextView_rtvTextSize, (int) TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_SP, 16, getResources().getDisplayMetrics())); // 默认文字字体大小16sp
mCornerSize = a.getFloat(R.styleable.RoundTextView_rtvCornerSize, 0); // 默认圆角度数为0
mBorderColor=a.getColor(R.styleable.RoundTextView_rtvBorderColor, Color.BLACK); // 默认边框颜色黑色
borderWidth = a.getFloat(R.styleable.RoundTextView_rtvBorderWidth, DisplayUtil.dip2px(context, 2)); // 默认边框大小2dp
isWithBorder=a.getBoolean(R.styleable.RoundTextView_rtvIsWithBorder, false); // 默认不带边框
isCirCle=a.getBoolean(R.styleable.RoundTextView_rtvIsCircle,false); // 默认不是圆形
a.recycle();
mtitlePaint = new Paint(Paint.FILTER_BITMAP_FLAG);
mtitlePaint.setAntiAlias(true);
mtitlePaint.setTextSize(mTitleTextSize);
mtitlePaint.setTextAlign(Paint.Align.LEFT);
mtitleBound = new Rect();
Log.e("RoundTextView", "mTitleText" + mTitleText);
if(StringUtil.isEmpty(mTitleText)){
textLenght=0;
text="";
}else{
text=mTitleText;
textLenght=mTitleText.length();
}
mtitlePaint.getTextBounds(text, 0,textLenght, mtitleBound);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int widthMode = MeasureSpec.getMode(widthMeasureSpec);
int widthSize = MeasureSpec.getSize(widthMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
int heightSize = MeasureSpec.getSize(heightMeasureSpec);
int width;
int height;
if (widthMode == MeasureSpec.EXACTLY) {
width = widthSize;
} else {
mtitlePaint.setTextSize(mTitleTextSize);
mtitlePaint.getTextBounds(text, 0, textLenght, mtitleBound);
int desired = getPaddingLeft() + mtitleBound.width() + getPaddingRight();
width = desired <= widthSize ? desired : widthSize;
}
if (heightMode == MeasureSpec.EXACTLY) {
height = heightSize;
} else {
mtitlePaint.setTextSize(mTitleTextSize);
mtitlePaint.getTextBounds(text, 0, textLenght, mtitleBound);
int desired = getPaddingTop() + mtitleBound.height() + getPaddingBottom();
height = desired <= heightSize ? desired : heightSize;
}
setMeasuredDimension(width, height);
}
@Override
protected void onDraw(Canvas canvas) {
if(isCirCle){
Paint paint = new Paint(Paint.FILTER_BITMAP_FLAG);
Paint borderPaint= new Paint(Paint.FILTER_BITMAP_FLAG);
paint.setAntiAlias(true);
paint.setDither(true);//防抖动
paint.setColor(rtvBackgroundColor);
if (isWithBorder) {
// 边框
borderPaint.setStyle(Paint.Style.STROKE);
borderPaint.setStrokeWidth(DisplayUtil.dip2px(getContext(), borderWidth));
borderPaint.setAntiAlias(true);
borderPaint.setDither(true);//防抖动
borderPaint.setColor(mBorderColor);
canvas.drawCircle(getWidth() / 2, getHeight() / 2, Math.max(getWidth(), getHeight()) / 2 - DisplayUtil.dip2px(getContext(), borderWidth), borderPaint);
canvas.drawCircle(getWidth()/2,getHeight()/2,Math.max(getWidth(), getHeight())/2- DisplayUtil.dip2px(getContext(), borderWidth),paint);
Log.e("onDraw", "isWithBorder");
}else{
canvas.drawCircle(getWidth()/2,getHeight()/2,Math.max(getWidth(), getHeight())/2,paint);
}
}else {
Paint paint = new Paint(Paint.FILTER_BITMAP_FLAG);
Paint borderPaint= new Paint(Paint.FILTER_BITMAP_FLAG);
RectF rec = new RectF(DisplayUtil.dip2px(getContext(),borderWidth), DisplayUtil.dip2px(getContext(),borderWidth), getMeasuredWidth() - DisplayUtil.dip2px(getContext(),borderWidth), getMeasuredHeight() - DisplayUtil.dip2px(getContext(),borderWidth));
if (isWithBorder) {
// 边框
borderPaint.setStyle(Paint.Style.STROKE);
borderPaint.setStrokeWidth(DisplayUtil.dip2px(getContext(), borderWidth));
borderPaint.setAntiAlias(true);
borderPaint.setDither(true);//防抖动
borderPaint.setColor(mBorderColor);
canvas.drawRoundRect(rec, DisplayUtil.dip2px(getContext(), mCornerSize), DisplayUtil.dip2px(getContext(), mCornerSize), borderPaint);
Log.e("onDraw", "isWithBorder");
} else {
rec = new RectF(0, 0, getMeasuredWidth(), getMeasuredHeight());
}
// 背景
paint.setAntiAlias(true);
paint.setDither(true);//防抖动
paint.setColor(rtvBackgroundColor);
canvas.drawRoundRect(rec, DisplayUtil.dip2px(getContext(), mCornerSize), DisplayUtil.dip2px(getContext(), mCornerSize), paint);
}
// 文字
mtitlePaint.setColor(mTitleTextColor);
Paint.FontMetricsInt fontMetrics = mtitlePaint.getFontMetricsInt();
int baseline = (getMeasuredHeight() - fontMetrics.bottom + fontMetrics.top) / 2 - fontMetrics.top;
// 默认居中显示，设置setTextAlign(Paint.Align.LEFT);并设置起点位置
canvas.drawText(text, getMeasuredWidth() / 2 - mtitleBound.width() / 2, baseline, mtitlePaint);
}
}
3、使用：布局文件XML直接使用，记得加上app命名空间xmlns:app=" http://schemas.android.com/apk/res-auto"
github地址： https://github.com/yanchengmeng/RoundTextView