在Android中的特定區域上塗漆

Question

我想使用Canvas來繪製特定的Line,Rectangle或Bitmap。如果我繪製位圖，它也將採用方形空背景。

所以我想只繪製了那個特定Bitmap區域。

Answer 1

創建與你的願望形象「BMP-1」的名稱位圖
創建自定義視圖
創建一個類，像這樣

class MyCustomView extends View{ 

private Rect m_ImageRect; 
private Rect m_TextRect ; 

//you need these constructor 
//you can init paint object or anything on them 
public MyCustomView (Context context, AttributeSet attrs, int defStyle) 
{ 
    super(context, attrs, defStyle); 
    m_Context = context; 

} 

public MyCustomView (Context context, AttributeSet attrs) 
{ 
    super(context, attrs); 
    m_Context = context; 

} 

public MyCustomView (Context context) 
{ 
    super(context); 
    m_Context = context; 

} 

//then override on draw method 
@Override 
protected void onDraw(Canvas canvas) 
{ 
    super.onDraw(canvas); 
      //here frist create two rectangle 
      //one for your image and two for text you want draw on it 
    m_ImageRect = canvas.getClipBounds(); 
     m_TextRect = canvas.getClipBounds(); 
      //it gives you an area that can draw on it, 
      //the width and height of your rect depend on your screen size device 
      canvas.drawBitmap(your bitmap(bmp1), null, m_ImageRect , paint); 
      canvas.save(); 
    canvas.clipRect(m_TextRect); 

      canvas.drawText("your text", the x position you want to start draw, 
      the y position you want to start draw, m_paintText); 

      canvas.restore(); 
} 
} 

末擴展視圖把定製視圖上的佈局，並設置它的領域發送價值來查看繪製每一個你想要的東西

我希望這是幫助你，如果這不是你想要的！
發佈你的代碼，所以也許我可以幫助你更多

Answer 2

似乎你需要剪貼畫。請參閱示例：http://www.example8.com/category/view/id/15543,Understanding Android Canvas Clipping,http://jtomlinson.blogspot.com/2008/10/clipping.html

使用剪輯，您可以指定哪些區域應該是'可編輯的'。