Android TextView去掉paddingTop和paddingBottom

来源：互联网发布：包丁藤四郎极化数据编辑：程序博客网时间：2024/06/06 11:01

最近项目中需要用libgdx渲染一个Android的TextView，但是绘制出来的TextView总是默认带有paddingTop和paddingBottom，如下图所示：
这里写图片描述

网上有很多解决方案，例如在xml中设置如下属性：

android:lineSpacingMultiplier="0.8"android:includeFontPadding="false"

或者设置margin为负值等等。但是以上方法在6.0之后都没什么卵用。只有一种方法可以做到，就是自定义TextView

package com.ef.smallstar.common.widget;import android.content.Context;import android.graphics.Canvas;import android.graphics.Paint;import android.graphics.Rect;import android.support.annotation.NonNull;import android.util.AttributeSet;/** * Created by Danny on 17/8/28. * * this is a Android TextView without padding top & padding bottom */public class TextViewWithoutPadding extends android.support.v7.widget.AppCompatTextView {    private final Paint mPaint = new Paint();    private final Rect mBounds = new Rect();    public TextViewWithoutPadding(Context context) {        super(context);    }    public TextViewWithoutPadding(Context context, AttributeSet attrs) {        super(context, attrs);    }    public TextViewWithoutPadding(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);    }    @Override    protected void onDraw(@NonNull Canvas canvas) {        final String text = calculateTextParams();        final int left = mBounds.left;        final int bottom = mBounds.bottom;        mBounds.offset(-mBounds.left, -mBounds.top);        mPaint.setAntiAlias(true);        mPaint.setColor(getCurrentTextColor());        canvas.drawText(text, -left, mBounds.bottom - bottom, mPaint);    }    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        super.onMeasure(widthMeasureSpec, heightMeasureSpec);        calculateTextParams();        setMeasuredDimension(mBounds.width() + 1, -mBounds.top + 1);    }    private String calculateTextParams() {        final String text = getText().toString();        final int textLength = text.length();        mPaint.setTextSize(getTextSize());        mPaint.getTextBounds(text, 0, textLength, mBounds);        if (textLength == 0) {            mBounds.right = mBounds.left;        }        return text;    }}

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