自定义View

package org.mobiletrain.shudu08;
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);
        
    }
    @Override
    protected void onDraw(Canvas canvas) {
        Paint paint = new Paint();
        //paint.setColor(Color.BLUE);
        paint.setARGB(150, 0, 0, 200);
        paint.setStrokeWidth(5);
        paint.setStyle(Paint.Style.STROKE);
        canvas.drawLine(0, 200, 600, 200, paint);
        
        paint.setTextSize(100);
        canvas.drawText("apple", 10, 200, paint);
        paint.setStyle(Paint.Style.FILL);
        canvas.drawText("apple", 300, 200, paint);
        super.onDraw(canvas);
    }
}

能看出drawText的y值就是基准线