小编Her*_*lur的帖子

我尝试使用SpannableString在切换按钮上放置一个图标.并且在API17上工作,但在API21上没有.

正如您所看到的,它适用于API17的Button和TextView,但仅在API21上使用TextView('Z'不替换为图标).

private SpannableStringBuilder createSpanIcon(int rid, String name){
    Drawable d = getActivity().getResources().getDrawable(rid);
    d.setBounds(0,0,20,20);
    ImageSpan imageSpan = new ImageSpan(d, DynamicDrawableSpan.ALIGN_BASELINE);
    SpannableStringBuilder builder = new SpannableStringBuilder();

        builder.append("Z\n")
               .append(name)
               .setSpan(imageSpan, 0, 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

        /* This give same result    
        builder.append("Z", imageSpan, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
               .append("RED", new ForegroundColorSpan(Color.RED), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
               .append("\n" + name);
        */

        return builder;
}

和

    Button btn = (Button)v.findViewById(R.id.myButton);
    SpannableStringBuilder _test = createSpanIcon(R.drawable.tc_g, "Click Me!" );
    btn.setText( _test );

    TextView txt = (TextView)v.findViewById(R.id.myText);
    SpannableStringBuilder _test2 = createSpanIcon(R.drawable.tc_g, "I'm text" );
    txt.setText( _test2 );

注意:我不想使用setCompoundDrawablesWithIntrinsicBounds …