TagTextView 行内标签TextView-编程知识

TagTextView 行内标签TextView

效果

效果如下，可以解析xml中配置的drawableStart ，然后将这个drawable显示在一行内。下一个开始。从这个drawable开始。
在这里插入图片描述

代码

MaxLengthTextView 是我另外一个自定义view MaxLengthTextView 如果内容超过xml中maxLength属性定义的文字数量时，会被添加省略号

package com.trs.v7.home.toutiao_v2.provider.rdwz;import static android.text.Spanned.SPAN_INCLUSIVE_EXCLUSIVE;import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.text.SpannableString;
import android.text.style.ImageSpan;
import android.util.AttributeSet;import androidx.annotation.NonNull;
import androidx.annotation.Nullable;import com.trs.nmip.common.ui.news.list.view.MaxLengthTextView;/*** <pre>* Created by zhuguohui* Date: 2024/1/9* Time: 10:39* Desc:这个类的作用是将在xml中配置的drawableStart* 对应的drawable 显示在一行里面。* </pre>*/
public class TagTextView extends MaxLengthTextView {private Drawable leftDrawable;public TagTextView(@NonNull Context context) {super(context);}@SuppressLint("UseCompatLoadingForDrawables")public TagTextView(@NonNull Context context, @Nullable AttributeSet attrs) {super(context, attrs);leftDrawable = null;if(attrs!=null) {int resourceValue = attrs.getAttributeResourceValue("http://schemas.android.com/apk/res/android","drawableStart", -1);if(resourceValue!=-1){leftDrawable=getResources().getDrawable(resourceValue);}//重置setCompoundDrawables(null, null, null, null);}}@Overridepublic void setText(CharSequence text, BufferType type) {super.setText(getTextWithLeftIcon(text, leftDrawable), type);}private static CharSequence getTextWithLeftIcon(CharSequence text, Drawable icon) {if (icon == null) {return text;}icon.setBounds(0, 0, icon.getIntrinsicWidth(), icon.getIntrinsicHeight());Bitmap bitmap = Bitmap.createBitmap(icon.getIntrinsicWidth(), icon.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);Canvas canvas = new Canvas(bitmap);icon.draw(canvas);//获取View的截图，用来当Tag图标//将图片设置到TextView中BitmapDrawable bitmapDrawable = new BitmapDrawable(bitmap);bitmapDrawable.setBounds(0, 0, bitmap.getWidth(), bitmap.getHeight());SpannableString spannableString = new SpannableString("icon" + text);MyIm imageSpan = new MyIm(bitmapDrawable);spannableString.setSpan(imageSpan, 0, "icon".length(), SPAN_INCLUSIVE_EXCLUSIVE);return spannableString;}/*** 可以居中对齐的ImageSPan*/public static class MyIm extends ImageSpan {public MyIm(Context arg0, int arg1) {super(arg0, arg1);}public MyIm(Drawable drawable) {super(drawable);}public int getSize(Paint paint, CharSequence text, int start, int end,Paint.FontMetricsInt fm) {Drawable d = getDrawable();Rect rect = d.getBounds();if (fm != null) {Paint.FontMetricsInt fmPaint = paint.getFontMetricsInt();int fontHeight = fmPaint.bottom - fmPaint.top;int drHeight = ((Rect) rect).bottom - rect.top;int top = drHeight / 2 - fontHeight / 4;int bottom = drHeight / 2 + fontHeight / 4;fm.ascent = -bottom;fm.top = -bottom;fm.bottom = top;fm.descent = top;}//15为paddingreturn rect.right + 15;}@Overridepublic void draw(Canvas canvas, CharSequence text, int start, int end,float x, int top, int y, int bottom, Paint paint) {Drawable b = getDrawable();canvas.save();int transY = 0;transY = ((bottom - top) - b.getBounds().bottom) / 2 + top;canvas.translate(x, transY);b.draw(canvas);canvas.restore();}}}