大傢好,今天和大傢分享如何在TextView中加入圖片的功能,有兩種方式,第一種是繼承TextView實現圖片通過重寫來實現圖片的顯示功能,第二種是利用現成的api實現圖片的顯示功能。我們知道TextView支持部分HTML標簽,但是想在TextView中加入圖片則怎麼做呢?直接通過<img src=""/>標簽肯定是不行的。通過查看API我們發現有這樣一個靜態的方法:
[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>那麼是不是隻要實現其中的Html.ImageGetter就可以加入圖片呢?答案是肯定的!
還是別廢話吧,代碼最直觀
[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>
這是效果圖:
摘自 秋風的博客