如何使用clicklistener使数字选择器在片段中工作

Question

我有一个标签布局，片段中的数字选择器似乎不起作用，值始终为0。 基本上我正在制作随机数应用程序。

我的片段中有三个数字选择器，一个给出最小数字，一个给出最大数量，一个给出随机数量。

在数字选择器中设置这些值后，用户点击一个按钮即可获得随机数。

对我来说，当设置值时，按钮没有做任何事情。

请建议我如何做到这一点。

我的片段活动

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.AppCompatActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.NumberPicker;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.Collections;


public class TabFragment2 extends Fragment {

    //declare Spinner object
    Spinner generatorType;
    Button getRandomNumberBtn;
    int minimumNumber;
    int maximumNumber;
    int quantity1;
    TextView randNumbText;


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.tab_fragment_2, container, false);

        getRandomNumberBtn = (Button) view.findViewById(R.id.get_number);


        NumberPicker miniText;
        final TextView minimumTextView = (TextView) view.findViewById(R.id.textView3);

        miniText = (NumberPicker) view.findViewById(R.id.start_number);
        miniText.setMinValue(0);
        miniText.setMaxValue(10000);
        miniText.setWrapSelectorWheel(true);

        miniText.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
            @Override
            public void onValueChange(NumberPicker picker, int oldVal1, int newVal1) {
                //Display the newly selected number from picker
                minimumTextView.setText("Min: " + newVal1);
            }
        });

        minimumNumber = miniText.getValue();


        NumberPicker maxiText;
        final TextView maximumTextView = (TextView) view.findViewById(R.id.textView2);


        maxiText = (NumberPicker) view.findViewById(R.id.end_number);
        maxiText.setMinValue(0);
        maxiText.setMaxValue(10000);
        maxiText.setWrapSelectorWheel(true);

        maxiText.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
            @Override
            public void onValueChange(NumberPicker picker, int oldVal2, int newVal2) {
                //Display the newly selected number from picker
                maximumTextView.setText("Max: " + newVal2);
            }
        });

        maximumNumber = maxiText.getValue();










        NumberPicker quantity;
        final TextView quantityTextView = (TextView) view.findViewById(R.id.quantity_text);


        quantity = (NumberPicker) view.findViewById(R.id.quantity_picker);
        quantity.setMinValue(0);
        quantity.setMaxValue(100);
        quantity.setWrapSelectorWheel(true);

        quantity.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
            @Override
            public void onValueChange(NumberPicker picker, int oldVal3, int newVal3) {
                //Display the newly selected number from picker
                quantityTextView.setText("Quantity: " + newVal3);
            }
        });

        quantity1 = quantity.getValue();


        randNumbText = (TextView) view.findViewById(R.id.random_number_display);



        getRandomNumberBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                int b = maximumNumber + 1;
                int a = minimumNumber;
                int c = quantity1;
                String multipleRandoms = "";

                ArrayList<Integer> list = new ArrayList<Integer>();
                ArrayList<Integer> list1 = new ArrayList<Integer>();
                for (int i = a; i < b; i++) {
                    list.add(new Integer(i));
                }

                int k = list.size();
                Collections.shuffle(list);


                if (k>c) {
                    for (int i = 1; i <= c; i++) {

                        list1.add(new Integer(list.get(i)));
                        multipleRandoms = list1.toString();


                    }
                }else if (k==c) {
                    multipleRandoms = list.toString();
                } else {
                    Toast toast = Toast.makeText(getActivity(),"Quantity can not be greater than numbers in range", Toast.LENGTH_LONG);
                    toast.show();
                }


                randNumbText.setText(multipleRandoms);

            }
        });










        return view;

    }

我的片段布局

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/tab_fragment_2"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:focusable="true"
    android:focusableInTouchMode="true"
    tools:context="com.example.tabstrial2.TabFragment2">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:paddingTop="@dimen/activity_vertical_margin">


        <LinearLayout
            android:id="@+id/linear_layout1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@id/generator_type_spinner"
            android:orientation="horizontal">

            <LinearLayout
                android:id="@+id/linear_layout2"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:orientation="vertical">

                <TextView
                    android:id="@+id/textView3"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center_horizontal"
                    android:layout_marginTop="10px"
                    android:text="Min" />

                <NumberPicker
                    android:id="@+id/start_number"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center_horizontal"
                    android:layout_marginBottom="20px"
                    android:layout_marginTop="20px" />

            </LinearLayout>

            <LinearLayout
                android:layout_width="2px"
                android:layout_height="match_parent"
                android:background="@android:color/black">

            </LinearLayout>

            <LinearLayout
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_centerHorizontal="true"
                android:layout_weight="1"
                android:orientation="vertical">

                <TextView
                    android:id="@+id/quantity_text"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center_horizontal"
                    android:layout_marginTop="10px"
                    android:text="Quantity" />

                <NumberPicker
                    android:id="@+id/quantity_picker"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center_horizontal"
                    android:layout_marginBottom="20px"
                    android:layout_marginTop="20px" />

            </LinearLayout>

            <LinearLayout
                android:layout_width="2px"
                android:layout_height="match_parent"
                android:background="@android:color/black">

            </LinearLayout>

            <LinearLayout
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:orientation="vertical">

                <TextView
                    android:id="@+id/textView2"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center_horizontal"
                    android:layout_marginTop="10px"
                    android:text="Max" />

                <NumberPicker
                    android:id="@+id/end_number"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_alignParentRight="true"
                    android:layout_below="@+id/textView2"
                    android:layout_gravity="center_horizontal"
                    android:layout_marginBottom="20px"
                    android:layout_marginTop="20px" />

            </LinearLayout>

        </LinearLayout>

        <TextView
            android:id="@+id/random_number_display"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/linear_layout1"
            android:layout_centerHorizontal="true"
            android:layout_margin="10px"
            android:textColor="@android:color/black"
            android:textSize="40dp" />


        <Button
            android:id="@+id/get_number"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/random_number_display"
            android:layout_centerHorizontal="true"
            android:background="@android:color/holo_orange_light"
            android:focusable="true"
            android:focusableInTouchMode="true"
            android:onClick="getRandomNumber"
            android:paddingLeft="20px"
            android:paddingRight="20px"
            android:text="Get Random Number" />

    </RelativeLayout>

</ScrollView>