Layout misto de gráfico e texto (centro da imagem + alteração da cor do texto)

pacote com . . _ . _ ui . widget ;
importar android.content.Context ;
importar android.graphics.Canvas ;
importar android.graphics.Paint ;
importar android.graphics.Rect ;
importar android.graphics.drawable.Drawable ;
importar android.text.style.ImageSpan ;
import java.lang.ref.WeakReference ;
/**
 * Nome: CenterImageSpan.java
 * Autor: lilei
 * Data: 06/05/2018
 * Comentário: //



TODO exibe imagens no centro de gráficos mistos
 */
 public class CenterImageSpan extends ImageSpan {
 private WeakReference < Drawable > mDrawableRef ;
     public CenterImageSpan ( Context context , int resourceId , int verticalAlignment ) {
 super ( context , resourceId , verticalAlignment ) ;
 }
 @Override
 public int getSize ( Paint paint , 
    
            
        CharSequence text , int start , int end ,
 Paint.FontMetricsInt fontMetricsInt ) {
 Drawable drawable = getDrawable () ;
Rect rect = desenhável . getBounds () ;
        if ( fontMetricsInt != null ) {
 Paint.FontMetricsInt fmPaint = paint . getFontMetricsInt () ;
            int fontHeight = fmPaint . descida                                                   -fmPaint . _ ascensão ;
            int drHeight = rect . inferior - rect . superior ;
            int centroY = fmPaint . subida + fontHeight / 2 ;
fontMetricsInt . subida = centroY - drAltura / 2 ;
fontMetricsInt . topo = fontMetricsInt . ascensão ;
fontMetricsInt .
                                    inferior = centroY + drHeight / 2 ;
fontMetricsInt . descida = fontMetricsInt . inferior ;
}
 retorno ret . certo ;
}
 @Override
 public void draw ( Canvas canvas , CharSequence text , int start , int end , float x , int top , int y ,
                      int bottom , Paint                                
        paint ) {
 Drawable drawable = getCachedDrawable () ;
tela . salvar () ;
Paint.FontMetricsInt fmPaint = pintar . getFontMetricsInt () ;
        int fontHeight = fmPaint . descida - fmPaint . ascensão ;
        int centroY = y + fmPaint . descida - fontHeight / 2 ;
        int                        transY = centerY - ( drawable . getBounds () . bottom - drawable . getBounds () . top ) / 2 ;
tela . traduzir ( x , transY ) ;
desenhável . desenhar ( tela ) ;
tela . restaurar () ;
}
 private Drawable getCachedDrawable () {
 WeakReference <                            
            Drawable > wr = mDrawableRef ;
Drawable d = nulo;
        if ( wr != null ) {
 d = wr . obter () ;
}
 if ( d == null ) {
 d = getDrawable () ;
mDrawableRef = new WeakReference <> ( d ) ;
}
 return d ;
}
 }                            
                                        
            

Classe ImageSpan integrada

Uso específico

TextView txt_explain = view.findViewById(R.id.txt_personal_dialog_explain);
String explain = txt_explain.getText().toString();
int start = explain.length();
String explain_pink = "变色字体";
int end = explain.length() + explain_pink.length();
SpannableString spannableString = new SpannableString(explain + explain_pink);
//设置颜色
spannableString.setSpan(new ForegroundColorSpan(Color.parseColor("#ff427b")), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

//设置问号
ImageSpan image = new CenterImageSpan(mContext, R.mipmap.ic_question, DynamicDrawableSpan.ALIGN_BASELINE);

spannableString.setSpan(image, end - 1, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
txt_explain.setText(spannableString);