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>