Draw 画图

public class Main extends Activity {
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(new MyView(this));
	}

	/**
	 * 创建一个View类
	 * 
	 * @author lilin
	 * @date 2011-9-5 下午05:18:47
	 * @ClassName: MyView
	 * @Description: TODO
	 */
	private class MyView extends View {

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

		@Override
		protected void onDraw(Canvas canvas) {
			// 重写onDraw()方法
			super.onDraw(canvas);

			canvas.drawColor(Color.WHITE);// 设置画布的颜色为白色
			/* -----------------画空心图 ------------------------ */
			Paint paint = new Paint();// 实例化画笔
			paint.setAntiAlias(true);
			paint.setColor(Color.GREEN);
			paint.setStyle(Paint.Style.STROKE);// 设置样式
			paint.setStrokeWidth(3);// 设置粗细

			canvas.drawCircle(40, 40, 30, paint);// 画圆
			canvas.drawRect(10, 90, 70, 150, paint);// 画矩形
			canvas.drawRect(10, 170, 70, 200, paint);// 画矩形

			RectF re = new RectF(10, 220, 70, 250);// 声明矩形
			canvas.drawOval(re, paint);// 画椭圆
			// 画一个三角形
			Path path = new Path();// 实例化路径
			path.moveTo(10, 330);// 移动到指定的点
			path.lineTo(70, 330);// 画线
			path.lineTo(40, 270);// 画线
			path.close();// 关闭路径
			canvas.drawPath(path, paint);// 画路径
			// 画一个梯形
			Path path1 = new Path();
			path1.moveTo(10, 410);
			path1.lineTo(70, 410);
			path1.lineTo(55, 350);
			path1.lineTo(25, 350);
			path1.close();
			canvas.drawPath(path1, paint);
			/* -----------------画实心图 ------------------------ */
			paint.setStyle(Paint.Style.FILL);
			paint.setColor(Color.RED);

			canvas.drawCircle(120, 40, 30, paint);
			canvas.drawRect(90, 90, 150, 150, paint);
			canvas.drawRect(90, 170, 150, 200, paint);

			RectF re2 = new RectF(90, 220, 150, 250);
			canvas.drawOval(re2, paint);

			Path path2 = new Path();
			path2.moveTo(90, 330);
			path2.lineTo(150, 330);
			path2.lineTo(120, 270);
			path2.close();
			canvas.drawPath(path2, paint);

			Path path3 = new Path();
			path3.moveTo(90, 410);
			path3.lineTo(150, 410);
			path3.lineTo(135, 350);
			path3.lineTo(105, 350);
			path3.close();
			canvas.drawPath(path3, paint);
			/* -----------------画渲染图 ------------------------ */
			Shader mShader = new LinearGradient(0, 0, 100, 100, new int[] {
					Color.GREEN, Color.RED, Color.BLUE, Color.YELLOW }, null,
					Shader.TileMode.REPEAT);// 线性渲染
			paint.setShader(mShader);// 为画笔设置线性渲染

			canvas.drawCircle(200, 40, 30, paint);
			canvas.drawRect(170, 90, 230, 150, paint);
			canvas.drawRect(170, 170, 230, 200, paint);

			RectF re3 = new RectF(170, 220, 230, 250);
			canvas.drawOval(re3, paint);

			Path path4 = new Path();
			path4.moveTo(170, 330);
			path4.lineTo(230, 330);
			path4.lineTo(200, 270);
			path4.close();
			canvas.drawPath(path4, paint);

			Path path5 = new Path();
			path5.moveTo(170, 410);
			path5.lineTo(230, 410);
			path5.lineTo(215, 350);
			path5.lineTo(185, 350);
			path5.close();
			canvas.drawPath(path5, paint);
			/* -----------------写字 ------------------------ */
			paint.setTextSize(24);
			canvas.drawText("Circle", 240, 50, paint);
			canvas.drawText(getResources().getString(R.string.str_text2), 240,
					120, paint);
			canvas.drawText(getResources().getString(R.string.str_text3), 240,
					190, paint);
			canvas.drawText(getResources().getString(R.string.str_text4), 240,
					250, paint);
			canvas.drawText(getResources().getString(R.string.str_text5), 240,
					320, paint);
			canvas.drawText(getResources().getString(R.string.str_text6), 240,
					390, paint);
		}

	}
}