自由手記

TransparentPanel.java

• public class TransparentPanel extends LinearLayout    
• {    
•     private Paint innerPaint, borderPaint ;   
•        
•     public TransparentPanel(Context context, AttributeSet attrs) {   
•         super(context, attrs);   
•         init();   
•     }   
•   
•     public TransparentPanel(Context context) {   
•         super(context);   
•         init();   
•     }   
•   
•     private void init() {   
•         innerPaint = new Paint();   
•         innerPaint.setARGB(225, 75, 75, 75); //gray   
•         innerPaint.setAntiAlias(true);   
•   
•         borderPaint = new Paint();   
•         borderPaint.setARGB(255, 255, 255, 255);   
•         borderPaint.setAntiAlias(true);   
•         borderPaint.setStyle(Style.STROKE);   
•         borderPaint.setStrokeWidth(2);   
•     }   
•        
•     public void setInnerPaint(Paint innerPaint) {   
•         this.innerPaint = innerPaint;   
•     }   
•   
•     public void setBorderPaint(Paint borderPaint) {   
•         this.borderPaint = borderPaint;   
•     }   
•   
•     @Override  
•     protected void dispatchDraw(Canvas canvas) {   
•            
•         RectF drawRect = new RectF();   
•         drawRect.set(0,0, getMeasuredWidth(), getMeasuredHeight());   
•            
•         canvas.drawRoundRect(drawRect, 5, 5, innerPaint);   
•         canvas.drawRoundRect(drawRect, 5, 5, borderPaint);   
•            
•         super.dispatchDraw(canvas);   
•     }   
• }  

layout.xml 

<LinearLayout   xmlns:android="http://schemas.android.com/apk/res/android" 
                                 android:layout_width="fill_parent" 
                                 android:layout_height="fill_parent"
                                 android:orientation="vertical"
                                 android:gravity="bottom"
                                 android:paddingLeft="5px"
                                 android:paddingTop="5px"
                                android:paddingRight="5px">

  <com.pocketjourney.view.TransparentPanel android:id="@+id/transparent_panel"
                                                                 android:layout_width="fill_parent"
                                                                 android:layout_height="wrap_content"
                                                                 android:paddingTop="5px"
                                                                 android:paddingLeft="5px"
                                                                 android:paddingBottom="5px"
                                                                 android:paddingRight="5px">
  
      <Button android:id="@+id/button_click_me" android:layout_width="wrap_content" 
                                                                   android:layout_height="wrap_content"
                                                                   android:text="Click Me!"/>
         
  </com.pocketjourney.view.TransparentPanel>

 </LinearLayout>