Android中的自定義選取器

Question

我正在關注自定義選取器開發的鏈接https://code.google.com/p/scroll-picker-view-for-android/。 我正在使用代碼中的滾動選取器視圖。 從下面的代碼如何獲得所選的項目？

@Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     scrollPickerView = new ScrollPickerView(this); 
     scrollPickerView.addSlot(getResources().getStringArray(R.array.custom_list), 1, ScrollPickerView.ScrollType.Ranged); 
     scrollPickerView.setSlotIndex(0, 13); 
     ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(LayoutParams.FILL_PARENT, 200); 
     this.setContentView(scrollPickerView, params); 
    } 

我想在選取器下面添加一個按鈕。一旦用戶點擊該按鈕，它應該提醒/敬酒選定的行文本。如何實現它？

Answer 1

試試這個輪選擇器視圖

public class MainActivity extends Activity 
    // TODO: Externalize string-array 
    String wheelMenu1[] = new String[]{"name 1", "name 2", "name 3", "name 4", "name 5", "name 6","name 7","name 8","name 9"}; 
    String wheelMenu2[] = new String[]{"age 1", "age 2", "age 3"}; 
    String wheelMenu3[] = new String[]{"10", "20","30","40","50","60"}; 

    // Wheel scrolled flag 
    private boolean wheelScrolled = false; 

    private TextView text; 
    private EditText text1; 
    private EditText text2; 
    private EditText text3; 

    @Override 
    public void onCreate(Bundle savedInstanceState) 
     { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.main); 

      initWheel1(R.id.p1); 
      initWheel2(R.id.p2); 
      initWheel3(R.id.p3); 

      text1 = (EditText) this.findViewById(R.id.r1); 
      text2 = (EditText) this.findViewById(R.id.r2); 
      text3 = (EditText) this.findViewById(R.id.r3); 
      text = (TextView) this.findViewById(R.id.result); 
     } 

    // Wheel scrolled listener 
    OnWheelScrollListener scrolledListener = new OnWheelScrollListener() 
     { 
      public void onScrollStarts(WheelView wheel) 
       { 
        wheelScrolled = true; 
       } 

      public void onScrollEnds(WheelView wheel) 
       { 
        wheelScrolled = false; 
        updateStatus(); 
       } 
     }; 

    // Wheel changed listener 
    private final OnWheelChangedListener changedListener = new OnWheelChangedListener() 
     { 
      public void onChanged(WheelView wheel, int oldValue, int newValue) 
       { 
        if (!wheelScrolled) 
         { 
          updateStatus(); 
         } 
       } 
     }; 

    /** 
    * Updates entered PIN status 
    */ 
    private void updateStatus() 
     { 
      text1.setText(wheelMenu1[getWheel(R.id.p1).getCurrentItem()]); 
      text2.setText(wheelMenu2[getWheel(R.id.p2).getCurrentItem()]); 
      text3.setText(wheelMenu3[getWheel(R.id.p3).getCurrentItem()]); 

      text.setText(wheelMenu1[getWheel(R.id.p1).getCurrentItem()] + " - " + wheelMenu2[getWheel(R.id.p2).getCurrentItem()] + " - " + wheelMenu3[getWheel(R.id.p3).getCurrentItem()]); 
     } 

    /** 
    * Initializes wheel 
    * 
    * @param id 
    *   the wheel widget Id 
    */ 

    private void initWheel1(int id) 
     { 
      WheelView wheel = (WheelView) findViewById(id); 
      wheel.setAdapter(new ArrayWheelAdapter<String>(wheelMenu1)); 
      wheel.setVisibleItems(2); 
      wheel.setCurrentItem(0); 
      wheel.addChangingListener(changedListener); 
      wheel.addScrollingListener(scrolledListener); 
     } 

    private void initWheel2(int id) 
     { 
      WheelView wheel = (WheelView) findViewById(id); 
      wheel.setAdapter(new ArrayWheelAdapter<String>(wheelMenu2)); 
      wheel.setVisibleItems(2); 
      wheel.setCurrentItem(0); 
      wheel.addChangingListener(changedListener); 
      wheel.addScrollingListener(scrolledListener); 
     } 

    private void initWheel3(int id) 
     { 
      WheelView wheel = (WheelView) findViewById(id); 

      wheel.setAdapter(new ArrayWheelAdapter<String>(wheelMenu3)); 
      wheel.setVisibleItems(2); 
      wheel.setCurrentItem(0); 
      wheel.addChangingListener(changedListener); 
      wheel.addScrollingListener(scrolledListener); 
     } 

    /** 
    * Returns wheel by Id 
    * 
    * @param id 
    *   the wheel Id 
    * @return the wheel with passed Id 
    */ 
    private WheelView getWheel(int id) 
     { 
      return (WheelView) findViewById(id); 
     } 

    /** 
    * Tests wheel value 
    * 
    * @param id 
    *   the wheel Id 
    * @param value 
    *   the value to test 
    * @return true if wheel value is equal to passed value 
    */ 
    private int getWheelValue(int id) 
     { 
      return getWheel(id).getCurrentItem(); 
     } 
}