27

我正在尝试设置文本视图的椭圆大小。使用以下代码。我想在 3 个点后的截断字符串末尾添加“查看更多”。如果使用相同的文本视图可以做到这一点，那就太好了，或者在单独的文本视图中“查看更多”也可以。允许的最大行数为 4。我尝试设置第一个文本视图的宽度，但它在前 3 行末尾留下了空白空间。请看下图。

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >

    <TextView
        android:id="@+id/tvReviewDescription"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:maxLines="4"
        android:text="I tend to shy away from restaurant chains, but wherever I go, PF Chang&apos;s has solidly good food and, like Starbucks, they&apos;re reliable. We were staying in Boston for a week and after a long day and blah blah blah blah... "
        android:textColor="@color/black"
        android:textSize="13dp" 
        android:maxLength="280"
        android:ellipsize="end"/>

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/tvReviewDescription"
        android:layout_alignParentRight="true"
        android:text="@string/label_view_more"
        android:textColor="@color/yellow" />
</RelativeLayout>

在此处输入图像描述

4

14 回答 14

30

寻找我的答案

   public static void makeTextViewResizable(final TextView tv, final int maxLine, final String expandText, final boolean viewMore) {

    if (tv.getTag() == null) {
        tv.setTag(tv.getText());
    }
    ViewTreeObserver vto = tv.getViewTreeObserver();
    vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {

        @SuppressWarnings("deprecation")
        @Override
        public void onGlobalLayout() {

            ViewTreeObserver obs = tv.getViewTreeObserver();
            obs.removeGlobalOnLayoutListener(this);
            if (maxLine == 0) {
                int lineEndIndex = tv.getLayout().getLineEnd(0);
                String text = tv.getText().subSequence(0, lineEndIndex - expandText.length() + 1) + " " + expandText;
                tv.setText(text);
                tv.setMovementMethod(LinkMovementMethod.getInstance());
                tv.setText(
                        addClickablePartTextViewResizable(Html.fromHtml(tv.getText().toString()), tv, maxLine, expandText,
                                viewMore), TextView.BufferType.SPANNABLE);
            } else if (maxLine > 0 && tv.getLineCount() >= maxLine) {
                int lineEndIndex = tv.getLayout().getLineEnd(maxLine - 1);
                String text = tv.getText().subSequence(0, lineEndIndex - expandText.length() + 1) + " " + expandText;
                tv.setText(text);
                tv.setMovementMethod(LinkMovementMethod.getInstance());
                tv.setText(
                        addClickablePartTextViewResizable(Html.fromHtml(tv.getText().toString()), tv, maxLine, expandText,
                                viewMore), TextView.BufferType.SPANNABLE);
            } else {
                int lineEndIndex = tv.getLayout().getLineEnd(tv.getLayout().getLineCount() - 1);
                String text = tv.getText().subSequence(0, lineEndIndex) + " " + expandText;
                tv.setText(text);
                tv.setMovementMethod(LinkMovementMethod.getInstance());
                tv.setText(
                        addClickablePartTextViewResizable(Html.fromHtml(tv.getText().toString()), tv, lineEndIndex, expandText,
                                viewMore), TextView.BufferType.SPANNABLE);
            }
        }
    });

}

private static SpannableStringBuilder addClickablePartTextViewResizable(final Spanned strSpanned, final TextView tv,
                                                                        final int maxLine, final String spanableText, final boolean viewMore) {
    String str = strSpanned.toString();
    SpannableStringBuilder ssb = new SpannableStringBuilder(strSpanned);

    if (str.contains(spanableText)) {


        ssb.setSpan(new MySpannable(false){
            @Override
            public void onClick(View widget) {
                if (viewMore) {
                    tv.setLayoutParams(tv.getLayoutParams());
                    tv.setText(tv.getTag().toString(), TextView.BufferType.SPANNABLE);
                    tv.invalidate();
                    makeTextViewResizable(tv, -1, "See Less", false);
                } else {
                    tv.setLayoutParams(tv.getLayoutParams());
                    tv.setText(tv.getTag().toString(), TextView.BufferType.SPANNABLE);
                    tv.invalidate();
                    makeTextViewResizable(tv, 3, ".. See More", true);
                }
            }
        }, str.indexOf(spanableText), str.indexOf(spanableText) + spanableText.length(), 0);

    }
    return ssb;

}

另一堂课：-

import android.graphics.Color;
import android.text.TextPaint;
import android.text.style.ClickableSpan;
import android.view.View;

public class MySpannable extends ClickableSpan {

private boolean isUnderline = true;

/**
 * Constructor
 */
public MySpannable(boolean isUnderline) {
    this.isUnderline = isUnderline;
}

@Override
public void updateDrawState(TextPaint ds) {
    ds.setUnderlineText(isUnderline);
    ds.setColor(Color.parseColor("#1b76d3"));
}

@Override
public void onClick(View widget) {


 }
}

最后一步调用它：

DetailTv.setText(discription);
makeTextViewResizable(DetailTv, 3, "See More", true);
于 2016-10-12T08:38:26.043 回答
22

比公认的答案更简单：

public static final int MAX_LINES = 3;
public static final String TWO_SPACES = " "; 

String myReallyLongText = "Bacon ipsum dolor amet porchetta venison ham fatback alcatra tri-tip, turducken strip steak sausage rump burgdoggen pork loin. Spare ribs filet mignon salami, strip steak ball tip shank frankfurter corned beef venison. Pig pork belly pork chop andouille. Porchetta pork belly ground round, filet mignon bresaola chuck swine shoulder leberkas jerky boudin. Landjaeger pork chop corned beef, tri-tip brisket rump pastrami flank."

textView.setText(myReallyLongText);
textView.post(new Runnable() {
                @Override
                public void run() {
                    // Past the maximum number of lines we want to display.
                    if (textView.getLineCount() > MAX_LINES) {
                        int lastCharShown = textView.getLayout().getLineVisibleEnd(MAX_LINES - 1);

                        textView.setMaxLines(MAX_LINES);

                        String moreString = context.getString(R.string.more);
                        String suffix = TWO_SPACES + moreString;
                        
                        // 3 is a "magic number" but it's just basically the length of the ellipsis we're going to insert
                        String actionDisplayText = myReallyLongText.substring(0, lastCharShown - suffix.length() - 3) + "..." + suffix;

                        SpannableString truncatedSpannableString = new SpannableString(actionDisplayText);
                        int startIndex = actionDisplayText.indexOf(moreString);
                        truncatedSpannableString.setSpan(new ForegroundColorSpan(context.getColor(android.R.color.blue)), startIndex, startIndex + moreString.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
                        textView.setText(truncatedSpannableString);
                    }
                }
            });

如果您希望文本的“查看更多”部分是可点击的（但不是整个 TextView），请使用本 StackOverflow 中概述的 ClickableSpan 以了解如何设置部分文本视图是可点击的。我会提醒你注意这对用户体验的影响，因为通常你会截断你的文本，因为你有很多文本并且你没有太多空间，所以你的字体大小可能已经很小了。让用户单击以导航到全文的小目标可能不是最佳或最容易获得的用户体验，特别是如果您的用户是老年人或有移动问题，难以点击屏幕的一小部分。一般来说，出于这个原因，我建议让您的整个 TextView 可点击，而不是其中的一小部分。

作为替代方案，您可以像我一样将其转换为自定义视图。这是课程；您可以使用 ClickableSpan 代码根据需要进行修改，但由于我已经很久没有编译这个项目了，我不希望进行更改，然后我需要验证是否可以安全发布。如果有人想解决这个问题，我欢迎编辑。

public class TruncatingTextView extends AppCompatTextView {
    private static final String TWO_SPACES = "  ";

    private int truncateAfter = Integer.MAX_VALUE;

    private String suffix;
    private final RelativeSizeSpan truncateTextSpan = new RelativeSizeSpan(0.75f);
    private ForegroundColorSpan viewMoreTextSpan;
    private final String moreString = getContext().getString(R.string.more);

    private final String ellipsis = getContext().getString(R.string.ellipsis);

    public TruncatingTextView(Context context) {
        super(context);
        init();
    }

    public TruncatingTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public TruncatingTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {
        viewMoreTextSpan = new ForegroundColorSpan(ContextCompat.getColor(getContext(), R.color.upsell_blue));
    }

    public void setText(CharSequence fullText, @Nullable CharSequence afterTruncation, int truncateAfterLineCount) {
        this.suffix = TWO_SPACES + moreString;

        if (!TextUtils.isEmpty(afterTruncation)) {
            suffix += TWO_SPACES + afterTruncation;
        }

        if (this.truncateAfter != truncateAfterLineCount) {
            this.truncateAfter = truncateAfterLineCount;
            setMaxLines(truncateAfter);
        }

        setText(fullText);
    }

    @Override
    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
        super.onLayout(changed, left, top, right, bottom);

        if (getLayout() != null && getLayout().getLineCount() > truncateAfter) {
            int lastCharToShowOfFullTextAfterTruncation = getLayout().getLineVisibleEnd(truncateAfter - 1) - suffix.length() - ellipsis.length();

            int startIndexOfMoreString = lastCharToShowOfFullTextAfterTruncation + TWO_SPACES.length() + 1;

            SpannableString truncatedSpannableString = new SpannableString(getText().subSequence(0, lastCharToShowOfFullTextAfterTruncation) + ellipsis + suffix);
            truncatedSpannableString.setSpan(truncateTextSpan, startIndexOfMoreString, truncatedSpannableString.length(), Spannable.SPAN_EXCLUSIVE_INCLUSIVE);
            truncatedSpannableString.setSpan(viewMoreTextSpan, startIndexOfMoreString, startIndexOfMoreString + moreString.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
            setText(truncatedSpannableString);
        }
    }
}
于 2016-11-14T23:49:58.710 回答
14

这可以在运行时实现，您需要做的就是检查字符串的长度并像这样在字符串的末尾添加带下划线的查看更多。

我以长度'20'为例，您可以根据您的要求进行更改。

final TextView result = (TextView) findViewById(R.id.textview);

String text = "I tend to shy away from restaurant chains, but wherever I go, PF Chang&apos;s has solidly good food and, like Starbucks, they&apos;re reliable. We were staying in Boston for a week and after a long day and blah blah blah blah...";

if (text.length()>20) {
    text=text.substring(0,20)+"...";
    result.setText(Html.fromHtml(text+"<font color='red'> <u>View More</u></font>"));       

}
于 2013-09-30T17:43:46.453 回答
5

查看我的图书馆：https ://github.com/AhmMhd/SeeMoreTextView-Android

<com.abdulhakeem.seemoretextview.SeeMoreTextView
    android:id="@+id/textview
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
/>

用法：

TextView seemoreTv = (TextView) findViewById(R.id.textview)

seemoreTv.setContent("some really long text here.")

它在 recyclerview 上也很有效。

于 2018-10-09T07:27:25.347 回答
4

这将产生椭圆效应。

设置布尔 isCheck=true；

把它放在xml中：

<TextView
        android:id="@+id/txt_id"
        android:maxLines="2"
        android:ellipsize="end"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

和代码：

txt_id= (TextView)findViewById(R.id.txt_id);
txt_id.setText("data");
txt_id.setOnClickListener(new View.OnClickListener() {
     @Override
     public void onClick(View view) {
                   if (isCheck) {
                      txt_id.setMaxLines(10);
                      isCheck = false;
                   } else {
                      txt_id.setMaxLines(2);
                      isCheck = true;
           }
       }
  }
于 2016-12-20T21:49:39.017 回答
3

在 Kotlin 适配器中，您可以这样写到 TextView 上的“查看更多”

if (News[position].description.length > 150) {
  holder.desc.text = Html.fromHtml(News[position].description.substring(0, 150) + "..." + "<font color='blue'> <u>View More</u></font>")
} else {
   holder.desc.text = News[position].description
}
holder.desc.setOnClickListener {
   if (holder.desc.text.toString().endsWith("View More")) {
      holder.desc.text = News[position].description
   } else {
      if (News[position].description.length > 150) {
        holder.desc.text = Html.fromHtml(News[position].description.substring(0, 150) + "..." + "<font color='blue'> <u>View More</u></font>")
      } else holder.desc.text = News[position].description
   }
}
于 2020-08-26T20:58:35.783 回答
2

在上述解决方案中，如果文本的长度小于最大行数，则会显示扩展文本（查看更多/更少）。在这个类中，我删除了这个错误。您只需要将此类放入您的代码中并在 XML 中使用它。您可以根据您的要求轻松修改它（扩展文本的颜色、字体样式等）

      public class ExpandableTextView extends AppCompatTextView {

    private static Context context;
    private TextView textView;
    private int maxLine = 3;
    private boolean isViewMore = true;

    public ExpandableTextView(Context context) {
        super(context);
        ExpandableTextView.context = context;
        textView = this;
        initViews();
    }

    public ExpandableTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        ExpandableTextView.context = context;
        textView = this;
        initViews();
    }

    public ExpandableTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        ExpandableTextView.context = context;
        textView = this;
        initViews();
    }

    public void initViews() {
        if (textView.getText().toString().isEmpty()) {
            return;
        }
        if (textView.getTag() == null) {
            textView.setTag(textView.getText());
        }
        textView.setTypeface(Typeface.createFromAsset(context.getAssets(), "GothamBook.ttf"));
        ViewTreeObserver vto = textView.getViewTreeObserver();
        vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @SuppressWarnings("deprecation")
            @Override
            public void onGlobalLayout() {
                String text, expandText = "See ";
                int lineEndIndex;
                ViewTreeObserver obs = textView.getViewTreeObserver();
                obs.removeGlobalOnLayoutListener(this);
                int lineCount = textView.getLayout().getLineCount();

                expandText += isViewMore ? "More" : "Less";
                if (lineCount <= maxLine) {
                    lineEndIndex = textView.getLayout().getLineEnd(textView.getLayout().getLineCount() - 1);
                    text = textView.getText().subSequence(0, lineEndIndex).toString();
                } else if (isViewMore && maxLine > 0 && textView.getLineCount() >= maxLine) {
                    lineEndIndex = textView.getLayout().getLineEnd(maxLine - 1);
                    text = textView.getText().subSequence(0, lineEndIndex - expandText.length() + 1) + " " + expandText;
                } else {
                    lineEndIndex = textView.getLayout().getLineEnd(textView.getLayout().getLineCount() - 1);
                    text = textView.getText().subSequence(0, lineEndIndex) + " " + expandText;
                }
                textView.setText(text);
                textView.setMovementMethod(LinkMovementMethod.getInstance());
                if (lineCount > maxLine)
                    textView.setText(addClickablePartTextViewResizable(expandText),
                            BufferType.SPANNABLE);
                textView.setSelected(true);
            }
        });
    }

    private SpannableStringBuilder addClickablePartTextViewResizable(final String expandText) {
        String string = textView.getText().toString();
        SpannableStringBuilder expandedStringBuilder = new SpannableStringBuilder(string);
        if (string.contains(expandText)) {
            expandedStringBuilder.setSpan(new ClickableSpan() {
                @Override
                public void onClick(View widget) {
                    textView.setLayoutParams(textView.getLayoutParams());
                    textView.setText(textView.getTag().toString(), BufferType.SPANNABLE);
                    textView.invalidate();
                    maxLine = isViewMore ? -1 : 3;
                    isViewMore = !isViewMore;
                    initViews();
                }

                @Override
                public void updateDrawState(@NonNull TextPaint ds) {
                    ds.setUnderlineText(true);
                    ds.setColor(context.getResources().getColor(R.color.red));
                    ds.setTypeface(Typeface.createFromAsset(context.getAssets(), "GothamMedium.ttf"));
                }
            }, string.indexOf(expandText), string.length(), 0);
        }
        return expandedStringBuilder;
    }
}

如果设置动态数据，则需要在将文本设置到文本视图后调用 initViews()。

tvDescription.setText(sessionModel.getDescription());
tvDescription.initViews();
于 2020-04-30T10:56:43.023 回答
2

这个解决方案更容易在代码中实现。它不能很好地支持即时更改，但可以很容易地进行修改。

public class ExpandableTextView extends TextView {

    private final String readMoreText = "...read more";
    private final int readMoreColor = Color.parseColor("#4A0281");

    private int _maxLines = 4;
    private CharSequence originalText;

    public ExpandableTextView(Context context) {
        super(context);
        init(context);
    }

    public ExpandableTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context);
    }

    public ExpandableTextView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init(context);
    }

    private void init(Context context) {

        ViewTreeObserver vto = getViewTreeObserver();
        vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {

            @SuppressWarnings("deprecation")
            @Override
            public void onGlobalLayout() {

                ViewTreeObserver obs = getViewTreeObserver();
                obs.removeGlobalOnLayoutListener(this);

                truncateText();
            }
        });
    }

    @Override
    public void setText(CharSequence text, BufferType type) {
        super.setText(text, type);

        if (originalText == null) {
            originalText = text;
        }
    }

    @Override
    public int getMaxLines() {
        return _maxLines;
    }

    @Override
    public void setMaxLines(int maxLines) {
        _maxLines = maxLines;
    }

    public void truncateText() {

        int maxLines = _maxLines;
        String text = getText().toString();

        if (getLineCount() >= maxLines) {

            int lineEndIndex = getLayout().getLineEnd(maxLines - 1);

            String truncatedText = getText().subSequence(0, lineEndIndex - readMoreText.length() + 1) + readMoreText;

            Spannable spannable = new SpannableString(truncatedText);
            spannable.setSpan(new ForegroundColorSpan(readMoreColor), truncatedText.length() - readMoreText.length(), truncatedText.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

            setText(spannable, TextView.BufferType.SPANNABLE);

            super.setMaxLines(_maxLines);
        }
    }

    public void expandText() {
        setText(originalText);
        super.setMaxLines(1000);
    }

    public void reset() {
        originalText = null;
    }
}
于 2017-06-01T13:44:06.173 回答
1

感谢Jitender的回答。改进它我已经根据文本的长度完成了以下实现。如果您希望在指定的行数之后查看更多选项但假设单行中有大约50个字符，这可能不是理想的解决方案如果您可以调整行数，则解决方案将运行良好。如果文本长度大于 150，以下解决方案将添加“查看更多”选项，并将文本省略为 150 个字符。单击“查看更多”将显示完整的文本，并带有“显示更少”选项并再次单击 Show Less 会将文本省略为 150 个字符。不需要单独的视图。它也适用于 recyclerview 项目的文本视图。

if(inputText.length()>150)
        {
            String text=inputText.substring(0,150)+"...";
            final String fulltext=inputText;

            final SpannableString ss = new SpannableString(text+"View More");

            ClickableSpan span1 = new ClickableSpan() {
                @Override
                public void onClick(View textView) {
                    // do some thing
                    SpannableString ss1 = new SpannableString(fulltext+"Show Less");
                    ClickableSpan span2 = new ClickableSpan() {
                        @Override
                        public void onClick(View textView) {
                            // do some thing
                            textView.setText(ss);
                            textView.setMovementMethod(LinkMovementMethod.getInstance());

                        }
                    };
                    ss1.setSpan(span2, fulltext.length(), ss1.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
                    ss1.setSpan(new ForegroundColorSpan(Color.BLUE), fulltext.length(), ss1.length(),
                            Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);


                    textView.setText(ss1);
                    textView.setMovementMethod(LinkMovementMethod.getInstance());
                }
            };
            ss.setSpan(span1, 153, 162, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
            ss.setSpan(new ForegroundColorSpan(Color.BLUE), 153,162,
                    Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

            textView.setText(ss);
            textView.setMovementMethod(LinkMovementMethod.getInstance());
        }
else
        {
            textView.setText(inputText);
        }
于 2017-10-14T05:47:55.660 回答
0

您可以为此使用以下代码；

 holder.tvMoreInfo.setText(horizontalList.get(position));

        holder.tvMoreInfo.post(new Runnable() {
            @Override
            public void run() {
                int lineCount = holder.tvMoreInfo.getLineCount();
                if (lineCount<3)
                {

                }else
                {
                    makeTextViewResizable(holder.tvMoreInfo, 3, "...More", true);
                }
            }
        });



 public static void makeTextViewResizable(final TextView tv, final int maxLine, final String expandText, final boolean viewMore) {

    if (tv.getTag() == null) {
        tv.setTag(tv.getText());
    }
    ViewTreeObserver vto = tv.getViewTreeObserver();
    vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {

        @SuppressWarnings("deprecation")
        @Override
        public void onGlobalLayout() {
            String text;
            int lineEndIndex;
            ViewTreeObserver obs = tv.getViewTreeObserver();
            obs.removeGlobalOnLayoutListener(this);
            if (maxLine == 0) {
                lineEndIndex = tv.getLayout().getLineEnd(0);
                text = tv.getText().subSequence(0, lineEndIndex - expandText.length() + 1) + " " + "<font color=\"#F15d36\">" + expandText + "</font>";
            } else if (maxLine > 0 && tv.getLineCount() >= maxLine) {
                lineEndIndex = tv.getLayout().getLineEnd(maxLine - 1);
                text = tv.getText().subSequence(0, lineEndIndex - expandText.length() + 1) + " " + "<font color=\"#F15d36\">" + expandText + "</font>";
            } else {
                lineEndIndex = tv.getLayout().getLineEnd(tv.getLayout().getLineCount() - 1);
                text = tv.getText().subSequence(0, lineEndIndex) + " " + "<font color=\"#F15d36\">" + expandText + "</font>";
            }
            tv.setText(Html.fromHtml(text));
            tv.setMovementMethod(LinkMovementMethod.getInstance());

            tv.setText(
                    addClickablePartTextViewResizable(Html.fromHtml(tv.getText().toString()), tv, lineEndIndex, expandText,
                            viewMore), TextView.BufferType.SPANNABLE);
        }
    });
}

private static SpannableStringBuilder addClickablePartTextViewResizable(final Spanned strSpanned, final TextView tv,
                                                                        final int maxLine, final String spanableText, final boolean viewMore) {
    String str = strSpanned.toString();
    SpannableStringBuilder ssb = new SpannableStringBuilder(strSpanned);

    if (str.contains(spanableText)) {
        ssb.setSpan(new MySpannable(false) {

            @Override
            public void onClick(View widget) {
                tv.setLayoutParams(tv.getLayoutParams());
                tv.setText(tv.getTag().toString(), TextView.BufferType.SPANNABLE);
                tv.invalidate();
                if (viewMore) {
                    makeTextViewResizable(tv, -1, "...Less", false);
                } else {
                    makeTextViewResizable(tv, 3, "...More", true);
                }

            }
        }, str.indexOf(spanableText), str.indexOf(spanableText) + spanableText.length(), 0);

    }
    return ssb;

}
于 2018-11-19T14:19:21.657 回答
0

可能为时已晚，但它是在 recyclerview 中处理此问题的最简单且经过测试的方法。

首先检查 textview 的长度并根据需要设置更多视图


if (inventory.getDescription().length()>90) {
  inventoryDescription.setText(Html.fromHtml(inventory.getDescription().substring(0,90)+"..."+"<font color='blue'> <u>View More</u></font>"));
 }
 else inventoryDescription.setText(inventory.getDescription());

并在 textview 点击监听器

inventoryDescription.setOnClickListener(new View.OnClickListener() {
            @Override
    public void onClick(View v) {

   if (inventoryDescription.getText().toString().endsWith("View More")) {
       inventoryDescription.setText(inventory.getDescription());
      } 
    else {

   if (inventory.getDescription().length()>90) {
 inventoryDescription.setText(Html.fromHtml(inventory.getDescription().substring(0,90)+"..."+"<font color='blue'> <u>View More</u></font>"));

   }
   else inventoryDescription.setText(inventory.getDescription());
    }

            }
        });
于 2020-01-28T17:20:17.717 回答
0

尝试使用这个库:)

//将此依赖添加到App Gradle中

implementation 'com.borjabravo:readmoretextview:2.1.0'

用法：

<com.borjabravo.readmoretextview.ReadMoreTextView
   android:id="@+id/text2"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_marginTop="@dimen/activity_vertical_margin"
   android:text="@string/DemoText"
   app:colorClickableText="#3F51B5"/>

检查此链接：https ://github.com/bravoborja/ReadMoreTextView

于 2020-05-07T19:00:36.913 回答
0

我写了一篇关于我如何在我们的应用程序中做到这一点的博客文章。它基于这里的一些其他解决方案，它可以显示read more.../ read less，并且在 RecyclerViews 中也很有效，因为文本是立即在主线程上计算的。

这是博客文章。

这是代码，在帖子中也有链接。

于 2021-07-30T08:58:07.373 回答
-2

而不是在第一个文本视图中使用 android:layout_alignParentLeft="true" 使用 android:layout_toLeftOf="@+id/textView1"

这应该照顾重叠的文本

于 2013-09-30T17:56:42.320 回答