android自定义EditText

最新推荐文章于 2023-09-25 01:07:28 发布

原创最新推荐文章于 2023-09-25 01:07:28 发布 · 1.1k 阅读

0 ·

CC 4.0 BY-SA版权

android琐事专栏收录该内容

94 篇文章

订阅专栏

本文介绍如何在自定义的EditText中实现简单的线条绘制效果，包括初始化画笔、设置颜色、获取字体大小、设置文本对齐方式等步骤，并在onDraw方法中实现线条绘制。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.Gravity;
import android.widget.EditText;

public class MyEditText extends EditText {

	public MyEditText(Context context, AttributeSet attrs) {
		super(context, attrs);
		// TODO Auto-generated constructor stub
	}

	private Paint paint;

	public MyEditText(Context context) {
		super(context);
	}

	@Override
	protected void onDraw(Canvas canvas) {
		paint = getPaint();
		paint.setColor(Color.GRAY);
		int lineHeight = this.getLineHeight();
		int topPadding = this.getPaddingTop();
		int leftPadding = this.getPaddingLeft();
		float textSize = getTextSize();
		setGravity(Gravity.LEFT | Gravity.TOP);
		int y = (int) (topPadding + textSize);
		for (int i = 0; i < 4; i++) {
			canvas.drawLine(leftPadding, y+10, getRight()-leftPadding,
					y+10, paint);
			y += lineHeight+3;
		}
		canvas.translate(0, 0);
		super.onDraw(canvas);
	}

}