主要代码:
package com.example.myapplication;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.View;
public class MyView extends View{
public MyView(Context context){
super(context);
}
protected void onDraw(Canvas canvas){
Paint paint=new Paint();
paint.setColor(Color.BLUE);
canvas.drawLine(0,0,200,200,paint);
super.onDraw(canvas);
}
}