【Android游戏开发之一】设置全屏以及绘画简单的图形

package com.himi;
import android.app.Activity;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;
public class MainActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
//隐去电池等图标和一切修饰部分（状态栏部分）
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
// 隐去标题栏（程序的名字）
setContentView(new MyView(this));
}
}

package com.himi;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.RectF;
import android.view.View;
public class MyView extends View {
private Paint paint ;
public MyView(Context context) {
super(context);
paint = new Paint();
paint.setAntiAlias(true);//设置画笔无锯齿(如果不设置可以看到效果很差)
this.setKeepScreenOn(true);//设置背景常亮
paint.setColor(Color.RED);
}
@Override
public void onDraw(Canvas canvas) {
canvas.drawColor(Color.WHITE);//设置刷屏颜色
Rect rect = new Rect(30,30,50,50); //这里最后两个参数不是宽高、而是矩形右下角的坐标
canvas.drawRect(rect, paint);
RectF rectF = new RectF(70f,30f,90f,90f);//RectF 只是矩形 float形式 只是跟Rect精确度不一样
canvas.drawArc(rectF, 0, 360, true, paint);
canvas.drawCircle(150, 30, 20, paint);//这也是画圆 第三个参数为半径
float[] points =new float[]{200f,10f,200f,40f,300f,30f,400f,70f};
canvas.drawLines(points, paint);
//		canvas.drawLines(points, 1, 4, paint);//选取特定点数组中两点来画出一条直线
canvas.drawText("Himi", 230, 30, paint);
}
}