Question

我正在尝试这个，但它对我不起作用

 Paint p = new Paint();
 p.setColor(ContextCompat.getColor(textView.getContext(),android.R.color.holo_red_dark));
 textView.setPaintFlags(p.getColor());
 textView.setPaintFlags(Paint.UNDERLINE_TEXT_FLAG);

Answer 1

试试这个，

package test.listchangelistener;

import java.util.Arrays;
import java.util.List;
import javafx.beans.Observable;
import javafx.collections.FXCollections;
import javafx.collections.ListChangeListener;
import javafx.collections.ObservableList;
import javafx.util.Callback;


public class listChangeDemo {
    public static void main(String[] args) {

        Person p1 = new Person("Ted", 26);
        Person p2 = new Person("Anne", 19);

        // just a simple list
        List<Person> persons = Arrays.asList(p1, p2);

        // extractor to observe change of person properties
        Callback<Person, Observable[]> extractor = (Person p) -> {
            return new Observable[]{
                p.ageProperty(),
                p.nameProperty()
            };
        };

        // make list observable and attach extractor
        ObservableList<Person> observablePersons = FXCollections.observableList(persons, extractor);

        // create listchangeListener for observableList
        ListChangeListener listener = (ListChangeListener) (ListChangeListener.Change c) -> {
            while (c.next()) {
                if (c.wasAdded()) {
                    System.out.println("these were added: ");

                    List addedSubList = c.getAddedSubList();
                    addedSubList.forEach((Object t) -> {
                        System.out.println("added Person: " + t);
                    });
                } else if (c.wasRemoved()) {
                    System.out.println("these were removed");

                    List removedSubList = c.getRemoved();
                    removedSubList.forEach((Object t) -> {
                        System.out.println("removed Person: " + t);
                    });

                } else if (c.wasUpdated()) {
                    System.out.println("these were updated");

                    System.out.println("Updated elements are: "
                            + c.getList().subList(c.getFrom(), c.getTo()));
                }
            }
        };

        // attach listchangeListener to observableList
        observablePersons.addListener(listener);

        // testing changes
        observablePersons.add(new Person("Siegfried", 10));

    }
}

了解更多信息，请参阅this问题。

Answer 2

edittext.getBackground().setColorFilter(color, PorterDuff.Mode.SRC_IN);

Answer 3

在drawable文件夹中创建一个under_line.xml文件，然后设置你的textview背景，如android：background =＆＃34; @ drawable / under_line＆＃34;

将此xml添加到drawable文件夹uder_line.xml
中

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:bottom="-15dp">
    <rotate xmlns:android="http://schemas.android.com/apk/res/android"
        android:fromDegrees="0"
        android:pivotX="0.5"
        android:pivotY="0.5"
        android:toDegrees="0">
        <shape android:shape="line">
            <stroke
                android:width="1dp"
                android:color="@android:color/holo_red_dark" />
        </shape>
    </rotate>
</item></layer-list>

然后像这样设置你的布局文本视图背景

机器人：背景=＆＃34; @可绘制/ under_line＆＃34;

如何给Textview下划线颜色不同和textcolor不同

3 个答案: