public class MyView extends View 
{ 
  public MyView(Context context, AttributeSet set) 
  { 
    super(context, set); 
  } 
  @Override 
  // 重寫該方法，進(jìn)行繪圖 
  protected void onDraw(Canvas canvas) 
  { 
    super.onDraw(canvas); 
    // 把整張畫布繪制成白色 
    canvas.drawColor(Color.WHITE); 
    Paint paint = new Paint();//創(chuàng)建一個(gè)畫筆對(duì)象 
    // 去鋸齒 
    paint.setAntiAlias(true); 
    paint.setColor(Color.BLUE);//設(shè)置畫筆顏色為藍(lán)色 
    paint.setStyle(Paint.Style.STROKE);//設(shè)置樣式 
    paint.setStrokeWidth(3);//設(shè)置樣式的寬度 
    // 繪制圓形 
    canvas.drawCircle(40, 40, 30, paint); 
    // 繪制正方形 
    canvas.drawRect(10, 80, 70, 140, paint); 
    // 繪制矩形 
    canvas.drawRect(10, 150, 70, 190, paint); 
    RectF re1 = new RectF(10, 200, 70, 230); 
    // 繪制圓角矩形 
    canvas.drawRoundRect(re1, 15, 15, paint); 
    RectF re11 = new RectF(10, 240, 70, 270); 
    // 繪制橢圓 
    canvas.drawOval(re11, paint);     
    // 定義一個(gè)Path對(duì)象，封閉成一個(gè)三角形。 
    Path path1 = new Path(); 
    path1.moveTo(10, 340);//將路徑點(diǎn)設(shè)置到10，340位置 
    path1.lineTo(70, 340);//將起始路徑點(diǎn)連接都70,340位置 
    path1.lineTo(40, 290);//將第二連接點(diǎn)連接到40,290位置 
    path1.close();//關(guān)閉路徑的繪制 
    // 根據(jù)Path進(jìn)行繪制，繪制三角形 
    canvas.drawPath(path1, paint); 
    // 定義一個(gè)Path對(duì)象，封閉成一個(gè)五角形。 
    Path path2 = new Path(); 
    path2.moveTo(26, 360); 
    path2.lineTo(54, 360); 
    path2.lineTo(70, 392); 
    path2.lineTo(40, 420); 
    path2.lineTo(10, 392); 
    path2.close(); 
    // 根據(jù)Path進(jìn)行繪制，繪制五角形 
    canvas.drawPath(path2, paint); 
    // ----------設(shè)置填充風(fēng)格后繪制---------- 
    paint.setStyle(Paint.Style.FILL); 
    paint.setColor(Color.RED); 
    canvas.drawCircle(120, 40, 30, paint); 
    //繪制正方形 
    canvas.drawRect(90, 80, 150, 140, paint); 
    //繪制矩形 
    canvas.drawRect(90, 150, 150, 190, paint); 
    RectF re2 = new RectF(90, 200, 150, 230); 
    //繪制圓角矩形 
    canvas.drawRoundRect(re2, 15, 15, paint); 
    RectF re21 = new RectF(90, 240, 150, 270); 
    // 繪制橢圓 
    canvas.drawOval(re21, paint);     
    Path path3 = new Path(); 
    path3.moveTo(90, 340); 
    path3.lineTo(150, 340); 
    path3.lineTo(120, 290); 
    path3.close(); 
    //繪制三角形 
    canvas.drawPath(path3, paint); 
    Path path4 = new Path(); 
    path4.moveTo(106, 360); 
    path4.lineTo(134, 360); 
    path4.lineTo(150, 392); 
    path4.lineTo(120, 420); 
    path4.lineTo(90, 392); 
    path4.close(); 
    //繪制五角形 
    canvas.drawPath(path4, paint); 
    // ----------設(shè)置漸變器后繪制---------- 
    // 為Paint設(shè)置漸變器 
    Shader mShader = new LinearGradient(0, 0, 40, 60 
      , new int[] { 
      Color.RED, Color.GREEN, Color.BLUE, Color.YELLOW } 
      , null , Shader.TileMode.REPEAT); 
    paint.setShader(mShader); 
    //設(shè)置陰影 
    paint.setShadowLayer(45 , 10 , 10 , Color.GRAY); 
    // 繪制圓形 
    canvas.drawCircle(200, 40, 30, paint); 
    // 繪制正方形 
    canvas.drawRect(170, 80, 230, 140, paint); 
    // 繪制矩形 
    canvas.drawRect(170, 150, 230, 190, paint); 
    RectF re3 = new RectF(170, 200, 230, 230); 
    // 繪制圓角矩形 
    canvas.drawRoundRect(re3, 15, 15, paint); 
    RectF re31 = new RectF(170, 240, 230, 270); 
    // 繪制橢圓 
    canvas.drawOval(re31, paint);     
    Path path5 = new Path(); 
    path5.moveTo(170, 340); 
    path5.lineTo(230, 340); 
    path5.lineTo(200, 290); 
    path5.close(); 
    // 根據(jù)Path進(jìn)行繪制，繪制三角形 
    canvas.drawPath(path5, paint); 
    Path path6 = new Path(); 
    path6.moveTo(186, 360); 
    path6.lineTo(214, 360); 
    path6.lineTo(230, 392); 
    path6.lineTo(200, 420); 
    path6.lineTo(170, 392); 
    path6.close(); 
    // 根據(jù)Path進(jìn)行繪制，繪制五角形 
    canvas.drawPath(path6, paint); 
    // ----------設(shè)置字符大小后繪制---------- 
    paint.setTextSize(24); 
    paint.setShader(null); 
    // 繪制7個(gè)字符串 
    canvas.drawText(getResources().getString(R.string.circle), 240, 50, 
      paint); 
    canvas.drawText(getResources().getString(R.string.square), 240, 120, 
      paint); 
    canvas.drawText(getResources().getString(R.string.rect), 240, 175, 
      paint); 
    canvas.drawText(getResources().getString(R.string.round_rect), 230, 
      220, paint); 
    canvas.drawText(getResources().getString(R.string.oval), 240, 
      260, paint);     
    canvas.drawText(getResources().getString(R.string.triangle), 240, 325, 
      paint); 
    canvas.drawText(getResources().getString(R.string.pentagon), 240, 390, 
      paint); 
  } 
}