Android--去除EditText边框，添加下划线，

     最近在实现一个小功能，原味的EditText不能很好满足我的要求，故思变。以下是小生在网上搜罗资料之后进行揉和的结果。

     读者若有更好的想法，请不吝赐教，将不胜感激！

 

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.BLUE);
	}
	
	@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);
	}
}

 

其次:设置LineEditText

<?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

 

最后：应用LineEditText

 

import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.os.Bundle;
import android.text.InputFilter;
import android.util.AttributeSet;
import android.widget.EditText;

public class LineEditTextTest extends Activity {
    /** Called when the activity is first created. */
	private EditText mEdit;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        mEdit=(LineEditText)findViewById(R.id.myEdit);
        mEdit.setHint("从这里开始输入...");
        mEdit.setSingleLine();
        mEdit.setFilters(new InputFilter[]{new InputFilter.LengthFilter(20)});
    }
    
}