核心代码:
package com.zjyb.demo15; import java.util.Random; import android.app.Activity; import android.graphics.drawable.Drawable; import android.os.Bundle; import android.text.SpannableString; import android.text.style.ImageSpan; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); final EditText txt=(EditText)findViewById(R.id.input_text); Button btn=(Button)findViewById(R.id.btn); //为按钮添加事件 btn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Random rd=new Random(); int fix=rd.nextInt(9)+1; Class cls=R.drawable.class; String name="face"+fix; try{ Drawable d=getResources().getDrawable(cls.getField(name).getInt(null)); d.setBounds(0, 0, d.getIntrinsicWidth(), d.getIntrinsicHeight()); //开始插入图片 //原理是先将图片生成,然后插入到已有内容的后面 //123是随便给的,你喜欢还可以给hello,无所谓 //这个值又是必须的,因为这个值存在的目的是给图片占位 SpannableString ss=new SpannableString("123"); ss.setSpan(new ImageSpan(d),0, 3, SpannableString.SPAN_EXCLUSIVE_EXCLUSIVE); txt.append(ss); }catch(Exception e){ Log.e("Tag", e.toString()); StackTraceElement[] ste=e.getStackTrace(); for(StackTraceElement s:ste){ Log.e("Tag",s.toString()); } } } }); } }
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