android使用markwon使关键字高亮
要使用Markwon在Android中高亮关键字,可以使用Markwon的SpanFactory功能。以下是一个示例:
首先,导入Markwon:
implementation 'io.noties.markwon:markwon:4.6.2'
然后,在布局文件中添加一个TextView:
<TextView
android:id="@+id/textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="This is a sample text to highlight keywords"
/>
接下来,在Activity或Fragment中使用以下代码:
import io.noties.markwon.Markwon;
import io.noties.markwon.SpanFactory;
import io.noties.markwon.SpannableBuilder;
import io.noties.markwon.ext.highlight.HighlightPlugin;
public class MainActivity extends AppCompatActivity {
private static final String KEYWORD = "highlight";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView textView = findViewById(R.id.textView);
// Create a SpanFactory to highlight the keyword
SpanFactory spanFactory = (configuration, props) -> {
if (props != null && props.containsKey("highlight")) {
return new BackgroundColorSpan(Color.YELLOW);
}
return null;
};
// Create a Markwon instance with HighlightPlugin and our SpanFactory
Markwon markwon = Markwon.builder(this)
.usePlugin(HighlightPlugin.create())
.usePlugin(new AbstractMarkwonPlugin() {
@Override
public void configure(@NonNull Registry registry) {
registry.addSpanFactory(spanFactory);
}
})
.build();
// Use Markwon to render the text with the keyword highlighted
SpannableBuilder spannableBuilder = SpannableBuilder.create("This is a sample text to highlight keywords");
int index = spannableBuilder.toString().indexOf(KEYWORD);
if (index >= 0) {
spannableBuilder.setSpan(new Object(), index, index + KEYWORD.length(), Spanned.SPAN_MARK_MARK);
spannableBuilder.setProp("highlight", true, index, index + KEYWORD.length());
spannableBuilder.setSpan(Spanned.SPAN_EXCLUSIVE_EXCLUSIVE, index, index + KEYWORD.length());
}
markwon.setMarkdown(textView, spannableBuilder);
}
}
这将使用自定义SpanFactory在文本中高亮关键字。在上面的示例中,我们使用BackgroundColorSpan来设置高亮颜色,但您可以使用任何其他Span来自定义高亮效果。
原文地址: http://www.cveoy.top/t/topic/bBQH 著作权归作者所有。请勿转载和采集!