自定义EditText 去除边框，添加下划线

原文地址：http://androidstudy.iteye.com/blog/770512

首先：重写EditText

//请在这里添加您的包名
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.widget.EditText;

public class LineEditText extends EditText {

    private Paint mPaint;
    /**
     * @param context
     * @param attrs
     */
    public LineEditText(Context context, AttributeSet attrs) {
        super(context, attrs);
        // TODO Auto-generated constructor stub
        mPaint = new Paint();

        mPaint.setStyle(Paint.Style.STROKE);
        mPaint.setColor(Color.RED);
    }

    @Override
    public void onDraw(Canvas canvas)
    {
        super.onDraw(canvas);

//      画底线
        
        canvas.drawLine(0,this.getHeight()-1,  this.getWidth()-1, this.getHeight()-1, mPaint);  
        canvas.drawLine(this.getWidth() - 1, this.getHeight(), this.getWidth() - 1, this.getHeight()/4, mPaint);  
        canvas.drawLine(0, this.getHeight(), 0, this.getHeight()/4, mPaint);
    }
}

 

其次:设置LineEditText(XML文件)

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<!--注意名称 -->
<com.marine.study.LineEditText

    android:id="@+id/myEdit"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    style="?android:attr/textViewStyle"
    android:background="@null"
    android:textColor="@null"
/>
</LinearLayout>

 其中background，可以设置成其他颜色等

textColor不一定要是null，可以设置字体颜色