大家好，今天和大家分享如何在TextView中加入图片的功能，有两种方式，第一种是继承TextView实现图片通过重写来实现图片的显示功能，第二种是利用现成的api实现图片的显示功能。我们知道TextView支持部分HTML标签，但是想在TextView中加入图片则怎么做呢？直接通过<img src=""/>标签肯定是不行的。通过查看API我们发现有这样一个静态的方法：
[java] <span style="font-family:SimSun;font-size:16px;">public static Spanned fromHtml (String source, Html.ImageGetter imageGetter, Html.TagHandler tagHandler) </span>
<span style="font-family:SimSun;font-size:16px;">public static Spanned fromHtml (String source, Html.ImageGetter imageGetter, Html.TagHandler tagHandler) </span>那么是不是只要实现其中的Html.ImageGetter就可以加入图片呢？答案是肯定的！
还是别废话吧，代码最直观
[java]<span style="font-family:SimSun;font-size:16px;">package org.winplus.demo;
import android.app.Activity;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.text.Html;
import android.text.Html.ImageGetter;
import android.widget.TextView;
public class TextViewDemoActivity extends Activity {
private TextView txtWecome;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
setupViews();
}
private void setupViews() {
txtWecome = (TextView) findViewById(R.id.wecome);
txtWecome.append(Html.fromHtml("<img src='"+R.drawable.tangcheng_ok+"'/>", imageGetter, null));
}
ImageGetter imageGetter = new ImageGetter() {
@Override
public Drawable getDrawable(String source) {
int id = Integer.parseInt(source);
Drawable drawable = getResources().getDrawable(id);
drawable.setBounds(0, 0, drawable.getIntrinsicWidth(),drawable.getIntrinsicHeight());
return drawable;
}
};
}</span>
<span style="font-family:SimSun;font-size:16px;">package org.winplus.demo;
import android.app.Activity;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.text.Html;
import android.text.Html.ImageGetter;
import android.widget.TextView;
public class TextViewDemoActivity extends Activity {
private TextView txtWecome;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
setupViews();
}
private void setupViews() {
txtWecome = (TextView) findViewById(R.id.wecome);
txtWecome.append(Html.fromHtml("<img src='"+R.drawable.tangcheng_ok+"'/>", imageGetter, null));
}
ImageGetter imageGetter = new ImageGetter() {
@Override
public Drawable getDrawable(String source) {
int id = Integer.parseInt(source);
Drawable drawable = getResources().getDrawable(id);
drawable.setBounds(0, 0, drawable.getIntrinsicWidth(),drawable.getIntrinsicHeight());
return drawable;
}
};
}</span>
这是效果图：
摘自 秋风的博客
