Android 游戏开发之View框架

MainActivity.java

[java]
package com.soai.view;

import android.os.Bundle;
import android.app.Activity;
import android.view.Window;
import android.view.WindowManager;

public class MainActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //全屏显示
        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
        this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(new MyView(this));
    }
}   www.zzzyk.com

MyView.java

[java]
package com.soai.view;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.MotionEvent;
import android.view.View;

/**
*
* @author SoAi
*
*/
public class MyView extends View {
    private int textX = 20,textY = 20;

    public MyView(Context context) {
        super(context);
        setFocusable(true);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        //创建一个画笔实例
        Paint paint = new Paint();
        paint.setColor(Color.RED);
        //绘制文本
        canvas.drawText("Game", textX, textY, paint);
        super.onDraw(canvas);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        //获取用户触屏的X轴赋值给文本的X坐标
        textX = (int)event.getX();
        //获取用户触屏的Y轴赋值给文本的Y坐标
        textY = (int)event.getY();
        invalidate();
        return true;
    }

}

MyView需要继承View,实现里面的onDraw(Canvas canvas)方法，Canvas为画布类相当于一张白纸，而Paint为画笔类恰好是画图工具的笔，利用这两个类可以很好的实现游戏中的绘图。
调用invalidate()方法则重新绘图一下，也就是调用onDraw()方法一次。如果在其它类中调用，则需要调用postInvalidate();这个方法。

补充：移动开发 , Android ,