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TextDrawableView.java
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TextDrawableView.java
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package com.suphu.demo.widget;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.support.annotation.IntDef;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import com.suphu.demo.R;
/**
* Created by huchao on 2017/8/8.
* 系统的textview的drawable的效果
*/
public class TextDrawableView extends View {
private static final int LEFT=0;
private static final int RIGHT=1;
private static final int TOP=2;
private static final int BOTTOM=3;
private String textValue;
private int textColor;
private int textSize;
private Bitmap img;
//图片的位置
@Postion
private int postion=BOTTOM;
@IntDef({LEFT,RIGHT,TOP,BOTTOM})
public @interface Postion{
}
private Paint mPaint;
private Rect mTextRect;
private Rect mImgRect;
private int spacing=10;//图片和文字的间距
public TextDrawableView(Context context) {
this(context,null);
}
public TextDrawableView(Context context, @Nullable AttributeSet attrs) {
this(context, attrs,0);
}
public TextDrawableView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
TypedArray ta=context.obtainStyledAttributes(attrs, R.styleable.TextDrawableView);
textValue=ta.getString(R.styleable.TextDrawableView_textdrawable_value);
textSize= (int) ta.getDimension(R.styleable.TextDrawableView_textdrawable_size,15);
textColor=ta.getColor(R.styleable.TextDrawableView_textdrawable_color, Color.BLACK);
img= BitmapFactory.decodeResource(getResources(),ta.getResourceId(R.styleable.TextDrawableView_textdrawable_img,0));
ta.recycle();
mPaint=new Paint();
mTextRect=new Rect();
mPaint.setAntiAlias(true);
mPaint.setTextSize(textSize);
mPaint.setColor(textColor);
mPaint.getTextBounds(textValue,0,textValue.length(),mTextRect);
mImgRect=new Rect();
}
@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=0;
int height=0;
switch (postion){
case LEFT://横向 宽度=图片+文字+间距 高度=取图片或者文字的高度最大值
case RIGHT:
width=img.getWidth()+mTextRect.width()+getPaddingLeft()+getPaddingRight()+spacing;
height=Math.max(img.getHeight(),mTextRect.height())+getPaddingTop()+getPaddingBottom();
break;
case TOP://纵向 宽度=取图片或者文字的宽度最大值 高度=图片+文字+间距
case BOTTOM:
width=Math.max(img.getWidth(),mTextRect.width())+getPaddingLeft()+getPaddingRight();
height=img.getHeight()+mTextRect.height()+getPaddingTop()+getPaddingBottom()+spacing;
setMeasuredDimension(widthMode==MeasureSpec.EXACTLY?widthSize:width,heightMode==MeasureSpec.EXACTLY?heightSize:height);
break;
}
Log.d("TextDrawable","width:"+width +",height:"+height);
setMeasuredDimension(widthMode==MeasureSpec.EXACTLY?widthSize:width,heightMode==MeasureSpec.EXACTLY?heightSize:height);
}
@Override
protected void onDraw(Canvas canvas) {
switch (postion){
case LEFT://先绘制图片左侧后绘制文字
Log.d("TextDrawable","onDraw====>left");
mImgRect.left=getPaddingLeft();
mImgRect.top=getPaddingTop();
mImgRect.right=getPaddingLeft()+img.getWidth();
mImgRect.bottom=getPaddingTop()+img.getHeight();
canvas.drawBitmap(img,null,mImgRect,mPaint);
canvas.drawText(textValue,0,textValue.length(),mImgRect.right+spacing,
img.getHeight()/2+mTextRect.height()/2+getPaddingTop(),mPaint);
break;
case RIGHT:
Log.d("TextDrawable","onDraw====>right");
mImgRect.left=getPaddingLeft()+mTextRect.width()+spacing;
mImgRect.top=getPaddingTop();
mImgRect.right=getPaddingLeft()+img.getWidth()+mTextRect.width();
mImgRect.bottom=getPaddingTop()+img.getHeight();
canvas.drawBitmap(img,null,mImgRect,mPaint);
canvas.drawText(textValue,0,textValue.length(),getPaddingLeft(),
img.getHeight()/2+mTextRect.height()/2+getPaddingTop(),mPaint);
break;
case TOP:
Log.d("TextDrawable","onDraw====>top");
if(img.getWidth()<mTextRect.width()){
mImgRect.left=getPaddingLeft()+mTextRect.width()/2-img.getWidth()/2;
mImgRect.right=mImgRect.left+img.getWidth();
canvas.drawText(textValue,0,textValue.length(),getPaddingLeft(),
getPaddingTop()+mTextRect.height(),mPaint);
}else{
mImgRect.left=getPaddingLeft();
mImgRect.right=getPaddingLeft()+img.getWidth();
canvas.drawText(textValue,0,textValue.length(),getPaddingLeft()+img.getWidth()/2-mTextRect.width()/2,
getPaddingTop()+mTextRect.height(),mPaint);
}
mImgRect.top=getPaddingTop();
mImgRect.bottom=getPaddingTop()+img.getHeight();
canvas.drawBitmap(img,null,mImgRect,mPaint);
break;
case BOTTOM:
Log.d("TextDrawable","onDraw====>bottom");
//判断图片和文字的宽度 来达到图片和文字居中绘制效果
if(img.getWidth()<mTextRect.width()){
mImgRect.left=getPaddingLeft()+mTextRect.width()/2-img.getWidth()/2;
mImgRect.right=mImgRect.left+img.getWidth();
canvas.drawText(textValue,0,textValue.length(),getPaddingLeft(),
getPaddingTop()+mTextRect.height(),mPaint);
}else{
mImgRect.left=getPaddingLeft();
mImgRect.right=getPaddingLeft()+img.getWidth();
canvas.drawText(textValue,0,textValue.length(),getPaddingLeft()+img.getWidth()/2-mTextRect.width()/2,
getPaddingTop()+mTextRect.height(),mPaint);
}
mImgRect.top=getPaddingTop()+mTextRect.height();
mImgRect.bottom=getPaddingTop()+mTextRect.height()+img.getHeight()+spacing;
canvas.drawBitmap(img,null,mImgRect,mPaint);
break;
}
}
public void setPostion(@Postion int postion){
this.postion=postion;
requestLayout();
}
}