如何在對話框中使用數字選擇器

Question

我想使用數字選擇器來獲取用戶的折扣百分比。一旦用戶輸入銷售價格，我想要一個對話框來詢問折扣百分比。我找不到在對話框中集成numberpicker的方法。

Answer 1

我已經NumberPicker小演示。這可能不完美，但您可以使用和修改相同的內容。

使用自定義對話框並設置號碼選取器。

更多信息@

http://developer.android.com/reference/android/widget/NumberPicker.html

public class MainActivity extends Activity implements NumberPicker.OnValueChangeListener 
{ 
    private TextView tv; 
    static Dialog d ; 
    @Override 
    public void onCreate(Bundle savedInstanceState) 
    { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     tv = (TextView) findViewById(R.id.textView1); 
     Button b = (Button) findViewById(R.id.button11);// on click of button display the dialog 
     b.setOnClickListener(new OnClickListener() 
     { 

      @Override 
      public void onClick(View v) { 
       show(); 
      } 
      }); 
      } 
    @Override 
    public void onValueChange(NumberPicker picker, int oldVal, int newVal) { 

     Log.i("value is",""+newVal); 

    } 

    public void show() 
    { 

     final Dialog d = new Dialog(MainActivity.this); 
     d.setTitle("NumberPicker"); 
     d.setContentView(R.layout.dialog); 
     Button b1 = (Button) d.findViewById(R.id.button1); 
     Button b2 = (Button) d.findViewById(R.id.button2); 
     final NumberPicker np = (NumberPicker) d.findViewById(R.id.numberPicker1); 
     np.setMaxValue(100); // max value 100 
     np.setMinValue(0); // min value 0 
     np.setWrapSelectorWheel(false); 
     np.setOnValueChangedListener(this); 
     b1.setOnClickListener(new OnClickListener() 
     { 
      @Override 
      public void onClick(View v) { 
       tv.setText(String.valueOf(np.getValue())); //set the value to textview 
       d.dismiss(); 
      }  
      }); 
     b2.setOnClickListener(new OnClickListener() 
     { 
      @Override 
      public void onClick(View v) { 
       d.dismiss(); // dismiss the dialog 
      }  
      }); 
     d.show(); 


    } 
} 

activity_main.xml中

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    tools:context=".MainActivity" > 

    <TextView 
     android:id="@+id/textView1" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="@string/hello_world" /> 

    <Button 
     android:id="@+id/button11" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignParentBottom="true" 
     android:layout_centerHorizontal="true" 
     android:text="Open" /> 

</RelativeLayout> 

dialog.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" > 

    <NumberPicker 
     android:id="@+id/numberPicker1" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignParentTop="true" 
     android:layout_centerHorizontal="true" 
     android:layout_marginTop="64dp" /> 

    <Button 
     android:id="@+id/button2" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_below="@+id/numberPicker1" 
     android:layout_marginLeft="20dp" 
     android:layout_marginTop="98dp" 
     android:layout_toRightOf="@+id/numberPicker1" 
     android:text="Cancel" /> 

    <Button 
     android:id="@+id/button1" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignBaseline="@+id/button2" 
     android:layout_alignBottom="@+id/button2" 
     android:layout_marginRight="16dp" 
     android:layout_toLeftOf="@+id/numberPicker1" 
     android:text="Set" /> 

</RelativeLayout> 

快照

Answer 2

請嘗試以下代碼：

 RelativeLayout linearLayout = new RelativeLayout(mContext); 
     final NumberPicker aNumberPicker = new NumberPicker(mContext); 
     aNumberPicker.setMaxValue(50); 
     aNumberPicker.setMinValue(1); 

     RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(50, 50); 
     RelativeLayout.LayoutParams numPicerParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT); 
     numPicerParams.addRule(RelativeLayout.CENTER_HORIZONTAL); 

     linearLayout.setLayoutParams(params); 
     linearLayout.addView(aNumberPicker,numPicerParams); 

     AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(mContext); 
     alertDialogBuilder.setTitle("Select the number"); 
     alertDialogBuilder.setView(linearLayout); 
     alertDialogBuilder 
       .setCancelable(false) 
       .setPositiveButton("Ok", 
         new DialogInterface.OnClickListener() { 
          public void onClick(DialogInterface dialog, 
               int id) { 
           Log.e("","New Quantity Value : "+ aNumberPicker.getValue()); 

          } 
         }) 
       .setNegativeButton("Cancel", 
         new DialogInterface.OnClickListener() { 
          public void onClick(DialogInterface dialog, 
               int id) { 
           dialog.cancel(); 
          } 
         }); 
     AlertDialog alertDialog = alertDialogBuilder.create(); 
     alertDialog.show(); 

Answer 3

這是其他的答案

final NumberPicker picker = new NumberPicker(context); 
picker.setMinValue(1); 
picker.setMaxValue(50); 

final FrameLayout layout = new FrameLayout(context); 
layout.addView(picker, new FrameLayout.LayoutParams(
    FrameLayout.LayoutParams.WRAP_CONTENT, 
    FrameLayout.LayoutParams.WRAP_CONTENT, 
    Gravity.CENTER)); 

new AlertDialog.Builder(context) 
    .setView(layout)   
    .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() { 
     @Override 
     public void onClick(DialogInterface dialogInterface, int i) { 
      // do something with picker.getValue() 
     } 
    }) 
    .setNegativeButton(android.R.string.cancel, null) 
    .show(); 

Answer 4

的

短得多變化創建DialogFragment實施onCreateDialog方法，該方法返回包含NumberPicker視圖警報對話框。 在需要顯示數字選取器對話框並顯示它的活動中實例化對話框片段。

使主機活動實現NumberPicker.OnValueChangeListener接口，以便對話框中的正負按鈕單擊事件處理程序可以通過調用接口onValueChange方法從NumberPicker傳遞當前值。

欲瞭解更多信息，你可以看到http://www.zoftino.com/android-numberpicker-dialog-example。

public class NumberPickerDialog extends DialogFragment { 
    private NumberPicker.OnValueChangeListener valueChangeListener; 

     @Override 
     public Dialog onCreateDialog(Bundle savedInstanceState) { 

      final NumberPicker numberPicker = new NumberPicker(getActivity()); 

      numberPicker.setMinValue(20); 
      numberPicker.setMaxValue(60); 

      AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); 
      builder.setTitle("Choose Value"); 
      builder.setMessage("Choose a number :"); 

      builder.setPositiveButton("OK", new DialogInterface.OnClickListener() { 
       @Override 
       public void onClick(DialogInterface dialog, int which) { 
        valueChangeListener.onValueChange(numberPicker, 
          numberPicker.getValue(), numberPicker.getValue()); 
       } 
      }); 

     builder.setNegativeButton("CANCEL", new DialogInterface.OnClickListener() { 
      @Override 
      public void onClick(DialogInterface dialog, int which) { 
       valueChangeListener.onValueChange(numberPicker, 
         numberPicker.getValue(), numberPicker.getValue()); 
      } 
     }); 

     builder.setView(numberPicker); 
     return builder.create(); 
    } 

    public NumberPicker.OnValueChangeListener getValueChangeListener() { 
     return valueChangeListener; 
    } 

    public void setValueChangeListener(NumberPicker.OnValueChangeListener valueChangeListener) { 
     this.valueChangeListener = valueChangeListener; 
    } 
}