EditText的解决方法忽略lineSpacingMultiplier

时间:2018-03-24 17:17:10

标签: android

由于I can not adjust the edittext linespacinghttps://issuetracker.google.com/issues/37009353#comment17

中提到的错误

我通过自定义onTextChanged

尝试了以下解决方法

LinedEditText.java

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;

/**
 * Created by yccheok on 24/3/2018.
 */

public class LinedEditText extends android.support.v7.widget.AppCompatEditText {
    public LinedEditText(Context context) {
        super(context);
        initPaint();
    }

    public LinedEditText(Context context, AttributeSet attrs) {
        super(context, attrs);
        initPaint();
    }

    public LinedEditText(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        initPaint();
    }

    private void initPaint() {
        mPaint.setStyle(Paint.Style.STROKE);
        mPaint.setColor(0x80000000);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        int left = getLeft();
        int right = getRight();
        int paddingTop = getPaddingTop();
        int paddingBottom = getPaddingBottom();
        int paddingLeft = getPaddingLeft();
        int paddingRight = getPaddingRight();
        int height = getHeight();
        int lineHeight = getLineHeight();
        int count = (height-paddingTop-paddingBottom) / lineHeight;

        float originalLineHeight = lineHeight / getLineSpacingMultiplier();

        for (int i = 0; i < count; i++) {
            float baseline = lineHeight * (i + 1) + paddingTop - mPaint.descent() - (lineHeight - originalLineHeight);
            canvas.drawLine(
                    left + paddingLeft,
                    baseline,
                    right - paddingRight,
                    baseline,
                    mPaint
            );
        }

        super.onDraw(canvas);
    }

    @Override
    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
        if (lengthBefore != lengthAfter) {
            float add = getLineSpacingExtra();
            float mul = getLineSpacingMultiplier();
            setLineSpacing(0f, 1f);
            setLineSpacing(add, mul);
        }
    }

    private Paint mPaint = new Paint();
}

XML

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <mypackage.LinedEditText
        android:id="@+id/edit_text"
        android:gravity="top"
        android:padding="12dp"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scrollbars="vertical"
        android:background="@android:color/transparent"
        android:textSize="18sp"
        android:singleLine="false"
        android:lineSpacingMultiplier="2.5"
        android:lineSpacingExtra="0dp"
        android:inputType="textMultiLine" />

</FrameLayout>

但是,光标仍有问题。按ENTER键将光标移动到下一行时,忽略行间距乘数绘制光标。当您开始输入时,只有光标的位置才会被纠正。

请看截图

按ENTER键之前

enter image description here

按ENTER键(光标忽略lineSpacingMultiplier

enter image description here

开始输入(光标正在考虑lineSpacingMultiplier

enter image description here

这是一个非常烦人的错误,谷歌尚未修复它。

我很想知道,你们有没有人遇到过坚实的解决方法?你介意与我们分享吗?

由于

2 个答案:

答案 0 :(得分:0)

您可以尝试覆盖onKeyUp()并调用setLineSpacing()

答案 1 :(得分:0)

在编辑中覆盖onMeasure,在可绘制游标中覆盖setBounds

参考:https://github.com/hanks-zyh/LineHeightEditText/issues/1#issuecomment-503476003