的菜單項

Question

自定義視圖，我需要有動態的菜單項，用戶自定義顏色的圓圈，像這樣：

觸摸該菜單項打開一個顏色選擇器。現在

，我有延伸查看樣品ColorPickerIcon

public class ColorPickerIcon extends View { 

private Paint mPaint; 
private int mColor; 

private final int mRadius = 20; 

public ColorPickerIcon(Context context) { 
    super(context); 

    mColor = Color.BLACK; 
    mPaint = createPaint(); 
} 

public ColorPickerIcon(Context context, AttributeSet attrs) { 
    super(context, attrs); 

    mColor = Color.BLACK; 
    mPaint = createPaint(); 
} 

@Override 
protected void onDraw(Canvas canvas) { 
    super.onDraw(canvas); 
    canvas.drawCircle(0, 0, mRadius, mPaint); 
} 

public void setPaintColor(int color) { 
    mColor = color; 
} 

private Paint createPaint() { 

    Paint temp = new Paint(); 
    temp.setAntiAlias(true); 
    temp.setStyle(Paint.Style.STROKE); 
    temp.setStrokeJoin(Paint.Join.ROUND); 

    temp.setStrokeWidth(6f); 
    temp.setColor(mColor); 

    return temp; 

} 

} 

和menu.xml文件

<item 
    android:id="@+id/menu_pick_color" 
    android:title="@string/pick_color" 
    yourapp:showAsAction="always" 
    yourapp:actionViewClass="com.example.widgets.ColorPickerIcon"/> 

<item 
    android:id="@+id/menu_clear" 
    android:icon="@null" 
    android:title="@string/clear" 
    yourapp:showAsAction="always"/> 

<item 
    android:id="@+id/menu_save" 
    android:icon="@null" 
    android:title="@string/save" 
    yourapp:showAsAction="always"/> 

但它不以這種方式工作，既可以我實例化這個類，也沒有渲染它。有沒有辦法使用自定義類和自定義動態視圖作爲菜單項？

Answer 1

好了，所以它原來是比簡單。

在DrawingActivity

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    MenuInflater inflater = getMenuInflater(); 
    inflater.inflate(R.menu.menu_drawing, menu); 

    MenuItem colorPicker = menu.findItem(R.id.menu_pick_color); 

    ShapeDrawable circle = new ShapeDrawable(new OvalShape()); 
    circle.getPaint().setColor(Color.GREEN); 
    circle.setIntrinsicHeight(120); 
    circle.setIntrinsicWidth(120); 
    circle.setBounds(0, 0, 120, 120); 

    colorPicker.setIcon(circle); 

    return true; 
} 

在menu.xml文件

<item 
    android:id="@+id/menu_pick_color" 
    android:title="@string/pick_color" 
    yourapp:showAsAction="always"/> 

這就是全部。

Answer 2

你需要做的是創建要用於項目的圖的佈局文件中，當你聲明菜單上的項目，分配這樣的佈局：

<item 
    android:id="@+id/menu_pick_color" 
    android:title="@string/pick_color" 
    app:showAsAction="always" 
    app:actionLayout="@layout/my_custom_item"/> 

就是這樣！

編輯：

訪問自定義項，並修改它在運行時顏色你可以做到這一點。

在你的活動（或片段）覆蓋onPrepareOptionsMenu（假設你已經是膨脹你的菜單與「onCreateOptionsMenu」）

@Override 
public boolean onPrepareOptionsMenu(Menu menu) { 

    //Get a reference to your item by id 
    MenuItem item = menu.findItem(R.id.menu_pick_color); 

    //Here, you get access to the view of your item, in this case, the layout of the item has a FrameLayout as root view but you can change it to whatever you use 
    FrameLayout rootView = (FrameLayout)item.getActionView(); 

    //Then you access to your control by finding it in the rootView 
    YourControlClass control = (YourControlClass) rootView.findViewById(R.id.control_id); 

    //And from here you can do whatever you want with your control 

    return true; 
}