android 笔记 --- Android Shadow 阴影制作
在Android View 中, 要制作阴影,
可以利用 Paint 物件的 setShadowLayer 函数.
Java 程式码范例 :
public class helloWorld extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView( new drawCanvas(this) ); } class drawCanvas extends View { public drawCanvas(Context context) { super(context); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); // 建立Paint 物件 Paint vPaint = new Paint(); Paint vPaint2 = new Paint(); // -------------------------------------------- // 设定颜色 vPaint.setColor(0xFFFFFF00); // 实心矩形 canvas.drawRect( 30 , 50 , 130 , 150 , vPaint ); // 设定阴影(柔边, X 轴位移, Y 轴位移, 阴影颜色) vPaint .setShadowLayer (5, 3, 3, 0xFFFF00FF); // 实心矩形& 其阴影 canvas.drawRect( 30 , 200 , 130 , 300 , vPaint ); // -------------------------------------------- // 设定颜色 vPaint2.setColor(0xFFFFFF00); // 空心 vPaint2 .setStyle(Style.STROKE); // 空心矩形 canvas.drawRect( 200 , 50 , 300 , 150 , vPaint2 ); // 设定阴影(柔边, X 轴位移, Y 轴位移, 阴影颜色) vPaint2 .setShadowLayer (5, 3, 3, 0xFFFF00FF); // 空心矩形& 其阴影 canvas.drawRect( 200 , 200 , 300 , 300 , vPaint2 ); } }}