Question

我正在开发一个数学应用程序，我需要用对角线打击文本，如果我使用穿透文本，该行显示为水平，我不能使用drawable，因为我已经将它用于文本视图背景我甚至尝试在带有边框的可绘制文件中创建对角线，但没有运气我无法做到。反正有没有实现这个目标？我正在附加我的文本视图背景文件

    <?xml version="1.0" encoding="utf-8" ?>
  <shape xmlns:android="http://schemas.android.com/apk/res/android"
   android:thickness="0dp"
   android:shape="rectangle">
 <stroke android:width="3dp"
  android:color="#4799E8"/>
 <corners android:radius="5dp" />
  <gradient
    android:startColor="#ffffff"
   android:endColor="#FFFFFF"
   android:type="linear"
   android:angle="270"/> 
  </shape>

Answer 1

您必须创建自定义 TextView才能实现此目标。

此answer将帮助您创建它。

public class ObliqueStrikeTextView extends TextView
{
    private int dividerColor;
    private Paint paint;

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

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

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

    private void init(Context context)
    {
        Resources resources = context.getResources();
        //replace with your color
        dividerColor = resources.getColor(R.color.black);

        paint = new Paint();
        paint.setColor(dividerColor);
        //replace with your desired width
        paint.setStrokeWidth(resources.getDimension(R.dimen.vertical_divider_width));
    }

    @Override
    protected void onDraw(Canvas canvas)
    {
        super.onDraw(canvas);
        canvas.drawLine(0, getHeight(), getWidth(), 0, paint);
    }
}

您可以通过使用您的包完全限定视图来在布局文件中使用它，如下所示：

<your.package.name.ObliqueStrikeTextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="1234567890"
        android:textSize="20sp"/>

Answer 2

我只想在@Nakul的答案中添加一点修改，那就是您不需要为删除线的长度定义静态尺寸，可以获取textview本身的宽度。

public class ObliqueStrikeTextView extends TextView
{
    private int dividerColor;
    private Paint paint;

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

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

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

    private void init(Context context)
    {
        Resources resources = context.getResources();
        //replace with your color
        dividerColor = resources.getColor(R.color.black);

        paint = new Paint();
        paint.setColor(dividerColor);
        //replace with your desired width
          /*Modification*/
        //Instead of providing static width you can pass the width of textview itself like this
        paint.setStrokeWidth(this.getWidth());
    }

    @Override
    protected void onDraw(Canvas canvas)
    {
        super.onDraw(canvas);
        canvas.drawLine(0, getHeight(), getWidth(), 0, paint);
    }
}

Answer 3

在科特林

public class ObliqueStrikeTextView : TextView {


private var dividerColor: Int = 0
private lateinit var paint: Paint

constructor(context: Context) : super(context) {
    init(context)
}

constructor(context: Context, attrs: AttributeSet) : super(context, attrs) {
    init(context)
}

constructor(context: Context, attrs: AttributeSet, defStyle: Int) : super(context, attrs, defStyle) {
    init(context)
}

private fun init(context: Context) {
    val resources = context.resources
    //replace with your color
    dividerColor = resources.getColor(R.color.black)

    paint = Paint()
    paint.apply {
        color = dividerColor
        //replace with your desired width
        strokeWidth = resources.getDimension(width)
    }

}

override fun onDraw(canvas: Canvas) {
    super.onDraw(canvas)
    if(::paint.isInitialized){
        canvas.drawLine(0.0f, height.toFloat(), width.toFloat(), 0.0f, paint)
    }
}
}

Answer 4

这是上面@sunil的答案的精简版。另外，我更改了删除线的角度，以使其在TextViews上看起来更好一些。

class ObliqueStrikeTextView @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null, defStyle: Int = 0)
    : TextView(context, attrs, defStyle) {

    private var dividerColor: Int = 0
    private var paint: Paint

    init {
        dividerColor = ContextCompat.getColor(context, R.color.redCarnation)
        paint = Paint().apply {
            color = dividerColor
            strokeWidth = resources.getDimension(R.dimen.strikethrough_line_width)
        }
    }

    override fun onDraw(canvas: Canvas) {
        super.onDraw(canvas)

        //reduce angle by 20%
        val startY = height * 0.8f
        val stopY = height - startY
        canvas.drawLine(0.0f, startY, width.toFloat(), stopY, paint)
    }
}

通过文字添加对角线打击

4 个答案: