TextView显示表情图像和文字

 

    通过TextView显示出表情图像和文字。

一、建立工程，在drawable下放入五张表情图片

二、activity_main.xml代码

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    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=".MainActivity" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:id="@+id/textview"
        android:background="#fff" 
        />

</RelativeLayout>

三、MainActivity.java代码

package com.study.android_textview2;

import java.lang.reflect.Field;

import android.R.drawable;
import android.os.Bundle;
import android.app.Activity;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.text.Html;
import android.text.Html.ImageGetter;
import android.text.method.LinkMovementMethod;
import android.view.Menu;
import android.widget.TextView;

public class MainActivity extends Activity {

    public int getResourceId(String name){
        try {
            //根据资源的ID的变量名获得Field的对象，使用反射机制实现的
            Field field = R.drawable.class.getField(name);
            //取得并返回资源的id的字段（静态变量）的值，使用反射机制
            return Integer.parseInt(field.get(null).toString());
            
        } catch (Exception e) {
            e.printStackTrace();
        }
        return 0;
    }
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        TextView textView = (TextView)this.findViewById(R.id.textview);
        textView.setTextColor(Color.BLACK);
        textView.setBackgroundColor(Color.WHITE);
        textView.setTextSize(20);
        String html = "图像1<img src='image1'/>图像2<img src='image2'/>图像3<img src='image3'/><p>";
        html += "图像4<a href='http://www.baidu.com'><img src='image4'/></a>图像5<img src='image5'/>";
        CharSequence charSequence = Html.fromHtml(html, new ImageGetter() {
            
            @Override
            public Drawable getDrawable(String source) {
                //获得系统资源的信息，比如图片信息
                Drawable drawable = getResources().getDrawable(getResourceId(source));
                //处理第三个图片文件按照50%的比例进行压缩
                if (source.equals("image3")) {
                    drawable.setBounds(0, 0, drawable.getIntrinsicWidth()/2, drawable.getIntrinsicHeight()/2);
                    
                }else {
                    drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
                }
                return drawable;
            }
        }, null);
        textView.setText(charSequence);
        textView.setMovementMethod(LinkMovementMethod.getInstance());
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
    
}

四、效果图