android - 如何为句子中的特定单词设置文本颜色？

Question

这是我的回应:

     Upto 1Feet $2
     After 3Feet $0.025

在上面的响应中，我需要为 2 美元和 0.025 美元设置绿色。其他文本包含黑色。

这是我的xml代码，

          <android.support.v7.widget.CardView
                android:id="@+id/book_cardview_estimate_layout_driver"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/book_cardview_area_layout"
                android:layout_centerHorizontal="true"
                android:layout_marginLeft="13dp"
                android:layout_marginRight="13dp"
                android:layout_marginTop="30dp"
                android:background="#ffffff"
                android:visibility="visible"
                card_view:cardElevation="8dp">


                <RelativeLayout
                    android:id="@+id/estimate_layout_driver"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:background="#ffffff"
                    android:visibility="visible">

                    <com.mylibrary.widgets.CustomTextView
                        android:id="@+id/estimate_driver_text_upto"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginLeft="10dp"
                        android:layout_marginTop="15dp"
                        android:layout_marginBottom="13dp"
                        android:text="Upto "
                        android:textColor="#000000"
                        android:textSize="15dp" />

                    <com.mylibrary.widgets.CustomTextView
                        android:id="@+id/estimate_driver_text_after"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_below="@+id/estimate_driver_text_upto"
                        android:layout_marginLeft="10dp"
                        android:layout_marginTop="13dp"
                        android:layout_marginBottom="15dp"
                        android:text="After"
                        android:visibility="visible"
                        android:textColor="#000000"
                        android:textSize="15dp" />
                </RelativeLayout>
            </android.support.v7.widget.CardView>

这里是java代码，

    Tv_estimate_driver_text_upto.setText(getResources().getString(R.string.upto) + " " + min_feet + getResources().getString(R.string.feet) + " " + sCurrencySymbol + min_fare);


  Tv_estimate_driver_text_after.setText(getResources().getString(R.string.after) + " " + after_per_feet + getResources().getString(R.string.feet) + " " + sCurrencySymbol + after_per_multi);

解释:

getResources().getString(R.string.upto)  = upto text,

min_feet  = 1 (its comes from json response),

getResources().getString(R.string.feet) = feet,

sCurrencySymbol  = $ (this comes from json response),

min_fare = 2 (some amount , comes from json response)

Answer 1

使用 Spans你可以改变部分句子的风格。

示例:

// text1 for different color
text1 = "Upto 1Feet $";

// text 2 in different color
            String text2 = min_fare;

            span1 = new SpannableString(text1);
// optional if you want to change text size
            span1.setSpan(new AbsoluteSizeSpan(textSize1), 0, text1.length(), SPAN_INCLUSIVE_INCLUSIVE);

// code for changing color of string 1
            span1.setSpan(new ForegroundColorSpan(ContextCompat.getColor(context, R.color.colorPrimary)), 0,
                    text1.length(), 0);
            // do same for string two and concat both span 
            CharSequence finalText = TextUtils.concat(span1, span2);

           txtEventType.setText(finalText);

编辑

void setSpan (Object what, int start, int end, int flags)

Object what : What to apply ForegroundColorSpan / AbsoluteSizeSpan , start : start of string,end : end of string , flags : Flag of Spanned