Android开发：自定义记事本样式EditText

实现代码如下：主方法，main.javaimport java.text.SimpleDateFormat;
import java.util.Date;import Android.app.Activity;
import android.os.Bundle;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;public class Main extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate（Bundle savedInstanceState） {
super.onCreate（savedInstanceState）;
LinearLayout layout = new LinearLayout（this）;
layout.setOrientation（LinearLayout.VERTICAL）;
MyNote mn = new MyNote（this）;
mn.setHeight（380）;
layout.addView（mn）;

LinearLayout layout1=new LinearLayout（this）;
layout1.setOrientation（LinearLayout.HORIZONTAL）;
Button button = new Button（this）;
button.setText（"确定"）;
button.setWidth（60）;
layout1.addView（button）;

TextView textview=new TextView（this）;
Date date=new Date（）;
SimpleDateFormat sdf=new SimpleDateFormat（"yyyy-MM-dd"）;
String dateString=sdf.format（date）;
textview.setText（dateString）;
textview.setWidth（200）;
textview.setPadding（60, 0, 0, 0）;
layout1.addView（textview）;

Button button1=new Button（this）;
button1.setText（"取消"）;
button1.setWidth（60）;
layout1.addView（button1）;

layout.addView（layout1）;

this.setContentView（layout）; }
}主方法中主要实现了整个画布的布局的简单设置。以下是自定义EditText的具体实现方法。MyNote.javaimport android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.Gravity;
import android.widget.EditText;public class MyNote extends EditText{ public MyNote（Context context） {
super（context）;
// TODO Auto-generated constructor stub
} protected void onDraw（Canvas canvas）{
int lineHeight=this.getLineHeight（）;
Paint mPaint=getPaint（）;
mPaint.setColor（Color.GRAY）;//文本编辑线
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<getLineCount（）;i++）{
canvas.drawLine（leftPadding, y+2, getRight（）-leftPadding, y+2, mPaint）;
y+=lineHeight;
}
canvas.translate（0, 0）;
super.onDraw（canvas）;
}
}