在 NumberPicker 中显示特定值

Question

用户打开 NumberPicker 时是否可以显示某些值？例如，我有最小值 = 10，最大值 = 50；

final NumberPicker picker = new NumberPicker(MonitorActivity.this);
        picker.setMinValue(10);
        picker.setMaxValue(50);

打开 NumberPicker 时，我想显示 value = 30 而不是标准 10。 我该怎么做？

更新：

upTv = (TextView) findViewById(R.id.upper_tv);
 upTv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                show(180, 200, upTv);

            }
        });
public void show(int int1, int int2, final TextView tv)
    {

        String button1String = "OK";
        String button2String = "cancell";
        ad = new AlertDialog.Builder(MonitorActivity.this);
        ad.setTitle("Title");  



        final NumberPicker picker = new NumberPicker(MonitorActivity.this);
        picker.setMinValue(int1);
        picker.setMaxValue(int2);
        picker.setWrapSelectorWheel(false);
        final FrameLayout parent = new FrameLayout(MonitorActivity.this);
        parent.addView(picker, new FrameLayout.LayoutParams(
                FrameLayout.LayoutParams.WRAP_CONTENT,
                FrameLayout.LayoutParams.WRAP_CONTENT,
                Gravity.CENTER));
        ad.setView(parent);

        ad.setPositiveButton(button1String, new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int arg1) {


                int pickedValue = picker.getValue();
                tv.setText(String.valueOf(picker.getValue()));
                picker.setValue(pickedValue);
            }
        });
        ad.setNegativeButton(button2String, new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int arg1) {

            }
        });
        ad.setCancelable(true);

        ad.show();
    }

Answer 1

NumberPicker picker = new NumberPicker(MonitorActivity.this);
picker.setMinValue(10);
picker.setMaxValue(50);

您只需执行此操作即可默认显示 30。

picker.setValue(30);