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android TextView和EditText中顯示圖片
EditText（TextView同樣處理）。
添加圖片主要用SpannableString和ImageSpan類：
Drawable drawable = getResources().getDrawable(R.drawable.icon);
drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
SpannableString spannable = new SpannableString(getText(R.id.editText1).toString() + "[smile]");
ImageSpan span = new ImageSpan(drawable, ImageSpan.ALIGN_BASELINE);
spannable.setSpan(span, getText(R.id.editText1).length(),getText(R.id.editText1).length()+"[smile]".length(), Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
editText.setText(spannable);
將需要的文字高亮顯示：
public void highlight(int start,int end){
SpannableStringBuilder spannable=new SpannableStringBuilder(getText().toString());//用於可變字符串
ForegroundColorSpan span=new ForegroundColorSpan(Color.RED);
spannable.setSpan(span, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
setText(spannable);
}
加下劃線：
public void underline(int start,int end){
SpannableStringBuilder spannable=new SpannableStringBuilder(getText().toString());
CharacterStyle span=new UnderlineSpan();
spannable.setSpan(span, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
setText(spannable);
}
組合運用：
SpannableStringBuilder spannable=new SpannableStringBuilder(getText().toString());
CharacterStyle span_1=new StyleSpan(android.graphics.Typeface.ITALIC);
CharacterStyle span_2=new ForegroundColorSpan(Color.RED);
spannable.setSpan(span_1, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
spannable.setSpan(span_2, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
setText(spannable);
案例：帶有\n換行符的字符串都可以用此方法顯示2種顏色
/**
* 帶有\n換行符的字符串都可以用此方法顯示2種顏色
* @param text
* @param color1
* @param color2
* @return
*/
public SpannableStringBuilder highlight(String text,int color1,int color2,int fontSize){
SpannableStringBuilder spannable=new SpannableStringBuilder(text);//用於可變字符串
CharacterStyle span_0=null,span_1=null,span_2;
int end=text.indexOf("\n");
if(end==-1){//如果沒有換行符就使用第一種顏色顯示
span_0=new ForegroundColorSpan(color1);
spannable.setSpan(span_0, 0, text.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}else{
span_0=new ForegroundColorSpan(color1);
span_1=new ForegroundColorSpan(color2);
spannable.setSpan(span_0, 0, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
spannable.setSpan(span_1, end+1, text.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
span_2=new AbsoluteSizeSpan(fontSize);//字體大小
spannable.setSpan(span_2, end+1, text.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}
return spannable;
}
最後更新：2017-04-03 07:57:08