我如何在 Android 布局 xml
文件中定义 下划线 文本?
我如何在 Android 布局 xml
文件中定义 下划线 文本?
android:text="@string/your_text_reference"
在字符串资源值中,
<string name="your_text_reference"><u>Underline me</u></string>
如果您想通过编程实现此操作,对于Kotlin,可以使用
textView.paintFlags = textView.paintFlags or Paint.UNDERLINE_TEXT_FLAG
或者,
textView.text = Html.fromHtml("<p><u>Underline me</u></p>")
import android.content.Context;
import android.text.Editable;
import android.text.SpannableString;
import android.text.TextWatcher;
import android.text.style.UnderlineSpan;
import android.util.AttributeSet;
import android.widget.TextView;
/**
* Created with IntelliJ IDEA.
* User: Justin
* Date: 9/11/13
* Time: 1:10 AM
*/
public class UnderlineTextView extends TextView
{
private boolean m_modifyingText = false;
public UnderlineTextView(Context context)
{
super(context);
init();
}
public UnderlineTextView(Context context, AttributeSet attrs)
{
super(context, attrs);
init();
}
public UnderlineTextView(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs, defStyle);
init();
}
private void init()
{
addTextChangedListener(new TextWatcher()
{
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after)
{
//Do nothing here... we don't care
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count)
{
//Do nothing here... we don't care
}
@Override
public void afterTextChanged(Editable s)
{
if (m_modifyingText)
return;
underlineText();
}
});
underlineText();
}
private void underlineText()
{
if (m_modifyingText)
return;
m_modifyingText = true;
SpannableString content = new SpannableString(getText());
content.setSpan(new UnderlineSpan(), 0, content.length(), 0);
setText(content);
m_modifyingText = false;
}
}
<com.your.package.name.UnderlineTextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:gravity="center"
android:text="This text is underlined"
android:textColor="@color/blue_light"
android:textSize="12sp"
android:textStyle="italic"/>
我在这个XML片段中添加了其他选项,以显示我的示例可以改变文本的颜色、大小和样式...
希望这可以帮到你!
TextView tv = findViewById(R.id.tv);
tv.setText("some text");
setUnderLineText(tv, "some");
public void setUnderLineText(TextView tv, String textToUnderLine) {
String tvt = tv.getText().toString();
int ofe = tvt.indexOf(textToUnderLine, 0);
UnderlineSpan underlineSpan = new UnderlineSpan();
SpannableString wordToSpan = new SpannableString(tv.getText());
for (int ofs = 0; ofs < tvt.length() && ofe != -1; ofs = ofe + 1) {
ofe = tvt.indexOf(textToUnderLine, ofs);
if (ofe == -1)
break;
else {
wordToSpan.setSpan(underlineSpan, ofe, ofe + textToUnderLine.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
tv.setText(wordToSpan, TextView.BufferType.SPANNABLE);
}
}
}
在字符串资源文件中使用 translatable
属性,例如:
<string name="example"><u>Example</u></string>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape android:shape="rectangle" >
<solid android:color="@android:color/transparent" />
</shape>
</item>
<item android:top="-5dp" android:right="-5dp" android:left="-5dp">
<shape>
<solid android:color="@android:color/transparent" />
<stroke
android:width="1.5dp"
android:color="@color/pure_white" />
</shape>
</item>
</layer-list>
一个简单灵活的xml解决方案:
<View
android:layout_width="match_parent"
android:layout_height="3sp"
android:layout_alignLeft="@+id/your_text_view_need_underline"
android:layout_alignRight="@+id/your_text_view_need_underline"
android:layout_below="@+id/your_text_view_need_underline"
android:background="@color/your_color" />
使用Class尝试
对于Java语言
textview.setPaintFlags(textview.getPaintFlags() | Paint.UNDERLINE_TEXT_FLAG);
对于 Kotlin
textview.setPaintFlags(textview.getPaintFlags() or Paint.UNDERLINE_TEXT_FLAG)
public class UnderLineTextView extends TextView {
public UnderLineTextView(Context context) {
super(context);
this.setPaintFlags(Paint.UNDERLINE_TEXT_FLAG);
}
public UnderLineTextView(Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
this.setPaintFlags(Paint.UNDERLINE_TEXT_FLAG);
}
}
<yourpackage.UnderLineTextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="underline text"
/>
tvTitle.apply {
text = "foobar"
paint?.isUnderlineText = true
}