android - StyleSpan 未应用于 TextView 中的 SpannableString

Question

我想将特定子字符串的字体设为粗体。

这是我的代码:

 String fullName = "some name";
 String searchFreeText = "some";
 SpannableString wordToSpan = new SpannableString(fullName);

Typeface helvticaBoldTypeface = Typeface.createFromAsset(context.getAssets(), FONT_HELVETICA_BOLD);
int startPosition = fullName.toLowerCase().indexOf(searchFreeText.toLowerCase());
StyleSpan bold = new StyleSpan(helvticaBoldTypeface.getStyle());
                    wordToSpan.setSpan(bold, startPosition, startPosition + searchFreeText.length(), 0);
 firstLineTextView.setText(wordToSpan, BufferType.SPANNABLE);

文本仍然不是粗体。如果我将代码更改为:

firstLineTextView.setTypeface(helvticaBoldTypeface, Typeface.BOLD);

并删除

 StyleSpan bold = new StyleSpan(helvticaBoldTypeface.getStyle());
                    wordToSpan.setSpan(bold, startPosition, startPosition + searchFreeText.length(), 0);

然后所有文本都是粗体，这没问题，但不是我想要的。我只需要将特定文本设为粗体。我希望看到这个:一些名字。

问题是什么？谢谢

Answer 1

I noticed one thing: You are using FONT_HELVETICA_BOLD (Which is already bold so nothing special gonna happen to your text cuz it is already bold just change it to some regular font)

You can find some fonts here

For making specific text bold and colored you can try the following code

SpannableStringBuilder spannableStringBuilder = new SpannableStringBuilder(textToBeSpannedWithBold);

StyleSpan styleSpan = new StyleSpan(android.graphics.Typeface.BOLD);

spannableStringBuilder.setSpan(styleSpan,
        positionOfSearchedText,
        positionOfSearchedText + searchTextToBeBold.length(),
        Spannable.SPAN_INCLUSIVE_INCLUSIVE);

//Use this if you wanna make specific text bold
SpannableString uncolouredSpan = new SpannableString(spannableStringBuilder);
textViewToBeBoldSpanned.setText(uncolouredSpan);

//Use this if you wanna make specific text bold plus coloured
SpannableString coloredSpan = giveMeColoredSpan(
        new SpannableString(spannableStringBuilder),
        ContextCompat.getColor(getContext(), R.color.your_specific_colour));

textViewToBeBoldSpannedAndColoured.setText(coloredSpan);


public static SpannableString giveMeColoredSpan(SpannableString spannableString, int color) {
    spannableString.setSpan(
            new ForegroundColorSpan(color), 0, spannableString.length(), 0);
    return spannableString;
}

If Still somehow you are stuck with your problem for that i have created a repo on Github https://github.com/harsh159357/customtextview

来 self 的 Repo 的 Activity 代码

CustomTextViewActivity.java

import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.Spannable;
import android.text.SpannableString;
import android.text.SpannableStringBuilder;
import android.text.style.ForegroundColorSpan;
import android.text.style.StyleSpan;
import android.view.View;
import android.widget.Button;
public class CustomTextViewActivity extends AppCompatActivity implements View.OnClickListener {
    public static final String MAKE_THIS_SPECIFIC_PART_COLORED = "MakeThisSpecificPartColored";
    public static final String MAKE_THIS_SPECIFIC_PART_BOLD = "MakeThisSpecificPartBold";
    public static final String MAKE_THIS_SPECIFIC_PART_BOLD_AND_COLORED = "MakeThisSpecificPartBoldAndColored";
    CustomTextView customTextView1,
            customTextView2,
            customTextView3;
    Button changeToRoboto,
            changeToCalculus,
            makeSpecificTextColored,
            makeSpecificTextBold,
            makeSpecificTextBoldAndColored;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_text_view);
        customTextView1 = (CustomTextView) findViewById(R.id.customTextView1);
        customTextView2 = (CustomTextView) findViewById(R.id.customTextView2);
        customTextView3 = (CustomTextView) findViewById(R.id.customTextView3);
        changeToRoboto = (Button) findViewById(R.id.change_to_roboto);
        changeToCalculus = (Button) findViewById(R.id.change_to_calculus);
        makeSpecificTextBold = (Button) findViewById(R.id.make_specific_text_bold);
        makeSpecificTextColored = (Button) findViewById(R.id.make_text_colored);
        makeSpecificTextBoldAndColored = (Button) findViewById(R.id.make_text_bold_and_colored);
        changeToRoboto.setOnClickListener(this);
        changeToCalculus.setOnClickListener(this);
        makeSpecificTextColored.setOnClickListener(this);
        makeSpecificTextBold.setOnClickListener(this);
        makeSpecificTextBoldAndColored.setOnClickListener(this);
    }
    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.change_to_roboto:
                customTextView1.setFont(getString(R.string.font_roboto_regular));
                customTextView2.setFont(getString(R.string.font_roboto_regular));
                customTextView3.setFont(getString(R.string.font_roboto_regular));
                break;
            case R.id.change_to_calculus:
                customTextView1.setFont(getString(R.string.font_calculus_sans));
                customTextView2.setFont(getString(R.string.font_calculus_sans));
                customTextView3.setFont(getString(R.string.font_calculus_sans));
                break;
            case R.id.make_text_colored:
                makeTextColoured();
                break;
            case R.id.make_specific_text_bold:
                makeSpecificTextBold();
                break;
            case R.id.make_text_bold_and_colored:
                makeTextBoldAndColored();
                break;
        }
    }
    public static SpannableString giveMeColoredSpan(SpannableString spannableString, int color) {
        spannableString.setSpan(
                new ForegroundColorSpan(color), 0, spannableString.length(), 0);
        return spannableString;
    }
    private void makeTextColoured() {
        String textToBeSpanned = customTextView1.getText().toString();
        SpannableStringBuilder spannableStringBuilder = new SpannableStringBuilder(textToBeSpanned);
        int positionOfSearchedText = textToBeSpanned.indexOf(MAKE_THIS_SPECIFIC_PART_COLORED);
        SpannableString coloredSpan = giveMeColoredSpan(
                new SpannableString(textToBeSpanned),
                ContextCompat.getColor(getApplicationContext(), android.R.color.holo_red_dark));
        customTextView1.setText(coloredSpan);
    }
    private void makeSpecificTextBold() {
        String textToBeSpanned = customTextView2.getText().toString();
        SpannableStringBuilder spannableStringBuilder = new SpannableStringBuilder(textToBeSpanned);
        int positionOfSearchedText = textToBeSpanned.indexOf(MAKE_THIS_SPECIFIC_PART_BOLD);
        StyleSpan styleSpan = new StyleSpan(android.graphics.Typeface.BOLD);
        spannableStringBuilder.setSpan(styleSpan,
                positionOfSearchedText,
                positionOfSearchedText + MAKE_THIS_SPECIFIC_PART_BOLD.length(),
                Spannable.SPAN_INCLUSIVE_INCLUSIVE);
        customTextView2.setText(spannableStringBuilder);
    }
    private void makeTextBoldAndColored() {
        String textToBeSpanned = customTextView3.getText().toString();
        SpannableStringBuilder spannableStringBuilder = new SpannableStringBuilder(textToBeSpanned);
        int positionOfSearchedText = textToBeSpanned.indexOf(MAKE_THIS_SPECIFIC_PART_BOLD_AND_COLORED);
        StyleSpan styleSpan = new StyleSpan(android.graphics.Typeface.BOLD);
        spannableStringBuilder.setSpan(styleSpan,
                positionOfSearchedText,
                positionOfSearchedText + MAKE_THIS_SPECIFIC_PART_BOLD_AND_COLORED.length(),
                Spannable.SPAN_INCLUSIVE_INCLUSIVE);
        SpannableString coloredBoldSpan = giveMeColoredSpan(
                new SpannableString(spannableStringBuilder),
                ContextCompat.getColor(getApplicationContext(), android.R.color.holo_red_dark));
        customTextView3.setText(coloredBoldSpan);
    }
}

actvity_text_view.xml

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/white">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="vertical"
        tools:context="com.harsh.customtextview.CustomTextViewActivity">

        <com.harsh.customtextview.CustomTextView
            android:id="@+id/customTextView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:gravity="center"
            android:text="@string/roboto_regular"
            android:textColor="@color/colorPrimary"
            android:textSize="18sp"
            app:font="@string/font_roboto_regular" />

        <com.harsh.customtextview.CustomTextView
            android:id="@+id/customTextView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:gravity="center"
            android:text="@string/themed_text"
            android:textColor="@color/colorPrimary"
            android:textSize="18sp"
            app:theme="@style/roboto_theme" />

        <com.harsh.customtextview.CustomTextView
            android:id="@+id/customTextView3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:gravity="center"
            android:text="@string/calculus_sans"
            android:textColor="@color/colorPrimary"
            android:textSize="18sp"
            app:font="@string/font_calculus_sans" />


        <Button
            android:id="@+id/change_to_roboto"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:text="Change to Roboto" />

        <Button
            android:id="@+id/change_to_calculus"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:text="Change to Calculus" />

        <Button
            android:id="@+id/make_text_colored"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:text="Make text coloured" />

        <Button
            android:id="@+id/make_specific_text_bold"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:text="Make specific text bold" />

        <Button
            android:id="@+id/make_text_bold_and_colored"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:text="Make text bold and colored" />

    </LinearLayout>
</ScrollView>