android - 可跨文本在对话框 fragment 中不起作用

Question

我在我的 Dialog fragment 中添加了 TextView 并且我在此 TextView 中动态显示 Spannable 数据。但它不会对文本应用 Spannable 效果。

这是我生成三个 Spannable 字符串并添加到 TextView 中的代码。

 TextView  textViewTicketSummary = (TextView) dialog.findViewById(R.id.ticketSummaryTextView);
 SpannableStringBuilder summary = new SpannableStringBuilder();
    SpannableString VehicleCaptureSpan, TotalVehicleSpan, DurationTimeSpan;

    String VehicleCapture = "Total Vehicles Captured:9";
    VehicleCaptureSpan = new SpannableString(VehicleCapture);
    VehicleCaptureSpan.setSpan(new StyleSpan(Typeface.BOLD), 0, VehicleCapture.length(), 0);
    VehicleCaptureSpan.setSpan(new ForegroundColorSpan(Color.RED), 0, VehicleCapture.length(), 0);
    VehicleCaptureSpan.setSpan(new RelativeSizeSpan(1.5f), 0, VehicleCapture.length(), 0);

    String TotalVehicle = "Total Car Park Capacity:10 ";
    TotalVehicleSpan = new SpannableString(TotalVehicle);
    TotalVehicleSpan.setSpan(new StyleSpan(Typeface.BOLD), 0, TotalVehicle.length(), 0);
    TotalVehicleSpan.setSpan(new ForegroundColorSpan(Color.RED), 0, TotalVehicle.length(), 0);
    TotalVehicleSpan.setSpan(new RelativeSizeSpan(1.5f), 0, TotalVehicle.length(), 0);

    String DurationTime = "Total Duration: 0 Min 3 Secs ";
    DurationTimeSpan = new SpannableString(DurationTime);
    DurationTimeSpan.setSpan(new StyleSpan(Typeface.BOLD), 0, DurationTime.length(), 0);
    DurationTimeSpan.setSpan(new ForegroundColorSpan(Color.RED), 0, DurationTime.length(), 0);
    DurationTimeSpan.setSpan(new RelativeSizeSpan(1.5f), 0, DurationTime.length(), 0);

    summary.append(VehicleCapture).append("\n\n")
            .append(TotalVehicle).append("\n\n")
            .append(DurationTime).append("\n");

    textViewTicketSummary.setText(summary, TextView.BufferType.SPANNABLE);

这是我的布局:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:background="@drawable/shape_dialog_patrol"
android:orientation="vertical"
android:paddingBottom="8dp" >

 <TextView
    android:id="@+id/dialogOneButtonMessage"
    style="@style/OneButtonDialogBody"
    android:text="Dialog Body" />

 <TextView
    android:id="@+id/ticketSummaryTextView"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="10dp"
    android:background="@drawable/shape_textview_rounded_lightblack"
    android:lineSpacingExtra="4dp"
    android:padding="12dp"
    android:text="Ticket Details"
    android:textAppearance="?android:attr/textAppearanceMedium"
    android:textColor="@color/white"/>

 <RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal"
    android:gravity="center_horizontal|top"
    android:orientation="horizontal" >

    <Button
        android:id="@+id/dialogOneButtonText"
        style="@style/OneButtonDialogButton2"
        android:layout_alignParentRight="true"
        android:layout_gravity="center_horizontal"
        android:text="@string/ok" />
   </RelativeLayout>

 </LinearLayout>

这是输出:

请给我一些提示..为什么它在 Dialog Fragment 中不起作用？

Answer 1

要实现这一点，您应该指定 Span 的类型。您可以在 setSpan() 方法的第四个参数中设置它。在您的情况下，该值应为 SPAN_EXCLUSIVE_EXCLUSIVE :

Spans of type SPAN_EXCLUSIVE_EXCLUSIVE do not expand to include text inserted at either their starting or ending point. They can never have a length of 0 and are automatically removed from the buffer if all the text they cover is removed.

像这样:

VehicleCaptureSpan.setSpan(
        new ForegroundColorSpan(Color.RED),
        0,
        VehicleCapture.length(),
        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE
);

但是如果你想设置整个文本的颜色或文本样式，使用 TextView 参数设置它们会更容易:

textViewTicketSummary.setTextColor(Color.RED);
textViewTicketSummary.setTextSize(TypedValue.COMPLEX_UNIT_SP, size);
textViewTicketSummary.setTypeface(Typeface.DEFAULT_BOLD);

更新: 您的代码中有一个有趣的小错误。您正在尝试将 String 而不是 SpannableString 值附加到生成器。只需将该代码更改为以下代码即可:

summary.append(VehicleCaptureSpan).append("\n\n")
        .append(TotalVehicleSpan).append("\n\n")
        .append(DurationTimeSpan).append("\n");