利用SpannableString和ImageSpan在textview中插入图片的方法

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="fill_parent"  android:layout_height="fill_parent"  android:orientation="vertical" >  <easy.stu.MyTextView    android:id="@+id/mytext"    android:layout_width="fill_parent"    android:layout_height="wrap_content" />  <Button    android:id="@+id/myButton"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:text="insert" /></LinearLayout>

package easy.stu;import android.content.Context;import android.graphics.drawable.Drawable;import android.text.Spannable;import android.text.SpannableString;import android.text.style.ImageSpan;import android.util.AttributeSet;import android.widget.EditText;public class MyTextView extends TextView {  public MyTextView(Context context) {    super(context);  }  public MyTextView(Context context, AttributeSet attrs) {    super(context, attrs);  }  public void insertDrawable(int id) {    final SpannableString ss = new SpannableString("easy");    //得到drawable对象，即所要插入的图片    Drawable d = getResources().getDrawable(id);    d.setBounds(0, 0, d.getIntrinsicWidth(), d.getIntrinsicHeight());    //用这个drawable对象代替字符串easy    ImageSpan span = new ImageSpan(d, ImageSpan.ALIGN_BASELINE);    //包括0但是不包括"easy".length()即：4。[0,4)。值得注意的是当我们复制这个图片的时候，实际是复制了"easy"这个字符串。    ss.setSpan(span, 0, "easy".length(), Spannable.SPAN_INCLUSIVE_EXCLUSIVE);    append(ss);  }}

package easy.stu;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class MyActivity extends Activity {  /** Called when the activity is first created. */  Button b;  MyEditText e;  public void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.main);    b = (Button) findViewById(R.id.myButton);    e = (MytextView) findViewById(R.id.mytext);    b.setOnClickListener(new OnClickListener() {      public void onClick(View v) {        e.insertDrawable(R.drawable.easy);      }    });  }}