問題與我的應用程序中的自定義繪圖

Question

我的代碼在這裏有什麼問題，爲什麼它不是在屏幕上繪製我的自定義視圖。

class CustActivty extends Activty{ 
private ShapeDrawable mDrawable;; 
Path path; 

public void onCreate(Bundle savedInstanceState){ 
super.onCreate(savedInstanceState); 
setContentView(R.layout.imagelayout); 
CustomView view=new CustomView(getApplicationContext()); 
RelativeLayout rl=(RelativeLayout)findViewById(R.id.relativeLayout1); 
rl.addView(view); 
} 


class CustomView extends View{ 

CustomView(Context context){ 

super（context）; path = new Path（）; RectF rec = new RectF（10,10,400,400）;

path.addArc(rec,90,180); 

mDrawable = new ShapeDrawable(new PathShape(path,400,400)); 
mDrawable.setBounds(10, 10, 400,400); 
mDrawable.getPaint().setColor(0xff74AC23); 
} 
protected void onDraw(Canvas canvas){ 
mDrawable.draw(canvas); 

} 
} 
} 

Plz任何人都有idea.Plz幫助。

Answer 1

您應該指定LayoutParams您view將使用被添加到RelativeLayout

所以，而不只是rl.addView(view)

RelativeLayout.LayoutParams params = //initialise them as you want 
rl.addView(view, params);