更改自定義視圖的顏色

Question

我試圖動態更改自定義視圖的顏色，但我無法弄清楚需要訪問和設置以實現此目的。這裏是我的代碼：

Context context; 
RectView rv; 
LinearLayout ll; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_debug); 

    context = this; 

    ll = (LinearLayout) findViewById(R.id.debugLayout); 

    rv = new RectView(context, 0, 100, 0, 100, true, false, "06:45 PM"); 
    ll.addView(rv); 
    ll.postInvalidate(); 

} 

public void changeColor(View view){ 

    //Color change code goes here 

} 

private class RectView extends View{ 

    float leftX, rightX, topY, bottomY; 
    boolean isAppt; 
    boolean isBeforeTime; 
    public Paint rectPaint; 
    private RectF rectangle; 
    String time; 

    public RectView(Context context, float _leftX, float _rightX, float _topY, float _bottomY, 
      boolean _isAppt, boolean _isBeforeTime, String _time){ 
     super(context); 
     leftX = _leftX; 
     rightX = _rightX; 
     topY = _topY; 
     bottomY = _bottomY; 
     isAppt = _isAppt; 
     isBeforeTime = _isBeforeTime; 
     time = _time; 
     init(); 
    } 

    private void init(){ 

     rectPaint = new Paint(); 

     if(leftX > rightX || topY > bottomY) 
      Toast.makeText(context, "Incorrect", Toast.LENGTH_SHORT).show(); 
     MyUtility.LogD_Common("Left = " + leftX + ", Top = " + topY + ", Right = " + rightX + 
       ", Bottom = " + bottomY); 
     rectangle = new RectF(leftX, topY, rightX, bottomY); 

     float height = bottomY; 
     float width = rightX - leftX; 
     MyUtility.LogD_Common("Height = " + height + ", Width = " + width); 
     RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
       RelativeLayout.LayoutParams.FILL_PARENT, (int) height); 
     params.leftMargin = (int) leftX; 
     //params.rightMargin = 10; 
     setLayoutParams(params); 
    } 

    public void setBeforeTime(boolean _isBeforeTime){ 
     isBeforeTime = _isBeforeTime; 
    } 

    protected void onDraw(Canvas canvas){ 
     if(isAppt){ 
      if(isBeforeTime) 
       rectPaint.setARGB(144, 119, 98, 95); 
      else 
       rectPaint.setARGB(144, 217, 131, 121); 
      //119,98,95 
      rectPaint.setStyle(Style.FILL); 
     } 
     else{ 
      rectPaint.setARGB(0, 0, 0, 0); 
      rectPaint.setStyle(Style.FILL); 
     } 
     canvas.drawRect(rectangle, rectPaint); 
     if(isAppt){ 
      rectPaint.setColor(Color.RED); 
      rectPaint.setStrokeWidth(2); 
      rectPaint.setStyle(Style.STROKE); 
      canvas.drawRect(rectangle, rectPaint); 
     } 
    } 

} 

這裏是XML：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/debugLayout" 
    android:layout_width="wrap_content" 
    android:layout_height="fill_parent" 
    android:orientation="vertical" > 

    <Button android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Change color" 
     android:onClick="changeColor" /> 

</LinearLayout> 

由於我沒有設置背景我不能讓背景和改變顏色的方式。矩形也需要同時具有筆畫和填充，並且可以動態創建。我如何去改變填充？

Answer 1

您的意思是視圖的背景顏色？如果是這樣，嘗試

view.setBackgroundColor(0xFF00FF00); 

OR

view.setBackgroundColor(Color.Red); 

這些職位可能會幫助：

How to set background color of a View

SetBackgroundColor in android