Android Numberpicker小数 [英] Android Numberpicker decimals
本文介绍了Android Numberpicker小数的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在尝试在Android中创建数字选择器，但方向盘仅增加1.我想增加0.1.我在网上查询了一下，但是发现格式化了的浮点数组使方向盘失效.请帮忙，对不起，我正在学习语法.
I'm trying to create a numberpicker in Android but the wheel only increase by 1. I want to increase by 0.1. I've looked up on the net but I've found a formated array of floats disabling the wheel. Please help and sorry for the grammar, I'm learning.
推荐答案
您可以基于创建自己的DecimalPicker视图ElegantNumberButton . 将以下类添加到您的项目中:
You can create your own DecimalPicker view based on ElegantNumberButton. Add following classes to your project:
/path/to/your/DecimalPicker.java
import android.content.Context;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffColorFilter;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.KeyEvent;
import android.view.View;
import android.view.inputmethod.EditorInfo;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.text.NumberFormat;
import java.util.Locale;
import ru.alanov.cashbox.R;
import ru.alanov.cashbox.Utils;
public class DecimalPicker extends RelativeLayout {
private Context context;
private AttributeSet attrs;
private int styleAttr;
private OnClickListener mListener;
private double initialNumber, finalNumber, lastNumber, currentNumber;
private EditText editText;
private String format;
private OnValueChangeListener onValueChangeListener;
public DecimalPicker(Context context) {
super(context);
this.context = context;
initView();
}
public DecimalPicker(Context context, AttributeSet attrs) {
super(context, attrs);
this.context = context;
this.attrs = attrs;
initView();
}
public DecimalPicker(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
this.context = context;
this.attrs = attrs;
this.styleAttr = defStyleAttr;
initView();
}
private void initView(){
inflate(context, R.layout.decimal_picker, this);
final Resources res = getResources();
final int defaultColor = res.getColor(R.color.colorPrimary);
final int defaultTextColor = res.getColor(R.color.colorText);
final Drawable defaultDrawable = res.getDrawable(R.drawable.decimal_picker_shape);
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.DecimalPicker, styleAttr, 0);
initialNumber = a.getInt(R.styleable.DecimalPicker_initialNumber, 0);
finalNumber = a.getInt(R.styleable.DecimalPicker_finalNumber, Integer.MAX_VALUE);
float textSize = a.getDimension(R.styleable.DecimalPicker_textSize, 24);
int color = a.getColor(R.styleable.DecimalPicker_backGroundColor,defaultColor);
int textColor = a.getColor(R.styleable.DecimalPicker_textColor,defaultTextColor);
Drawable drawable = a.getDrawable(R.styleable.DecimalPicker_backgroundDrawable);
Button buttonMinus = (Button) findViewById(R.id.subtract_btn);
Button buttonPlus = (Button) findViewById(R.id.add_btn);
editText = (EditText) findViewById(R.id.number_counter);
editText.setOnEditorActionListener(new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
if (actionId == EditorInfo.IME_ACTION_DONE || actionId == EditorInfo.IME_ACTION_NEXT) {
String num = ((EditText) v).getText().toString();
setNumber(num, true);
}
return false;
}
});
editText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void afterTextChanged(Editable s) {
String value = s.toString().trim();
double valueDouble = -1;
try {
valueDouble = parseDouble(value.isEmpty() ? "0" : value);
} catch (NumberFormatException e) {
e.printStackTrace();
}
if (valueDouble >= 0){
lastNumber = currentNumber;
currentNumber = valueDouble;
callListener(DecimalPicker.this);
}
}
});
LinearLayout mLayout = (LinearLayout) findViewById(R.id.decimal_picker_layout);
buttonMinus.setTextColor(textColor);
buttonPlus.setTextColor(textColor);
editText.setTextColor(textColor);
buttonMinus.setTextSize(textSize);
buttonPlus.setTextSize(textSize);
editText.setTextSize(textSize);
if (drawable == null){
drawable = defaultDrawable;
}
assert drawable != null;
drawable.setColorFilter(new PorterDuffColorFilter(color, PorterDuff.Mode.SRC));
if (Build.VERSION.SDK_INT > 16)
mLayout.setBackground(drawable);
else
mLayout.setBackgroundDrawable(drawable);
editText.setText(String.valueOf(initialNumber));
currentNumber = initialNumber;
lastNumber = initialNumber;
buttonMinus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View mView) {
double num = parseDouble(editText.getText().toString());
setNumber(String.valueOf(num - 1)/*, true*/);
}
});
buttonPlus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View mView) {
double num = parseDouble(editText.getText().toString());
setNumber(String.valueOf(num + 1)/*, true*/);
}
});
a.recycle();
}
private void callListener(View view){
if (mListener != null)
mListener.onClick(view);
if (onValueChangeListener != null && lastNumber != currentNumber)
onValueChangeListener.onValueChange(this, lastNumber, currentNumber);
}
public String getNumber(){
return String.valueOf(currentNumber);
}
public void setNumber(String number) {
try {
double n = parseDouble(number);
if (n > finalNumber)
n = finalNumber;
if (n < initialNumber)
n = initialNumber;
if (format != null) {
String num = String.format(Utils.getCurrentLocale(getContext()), format, n);
num = removeTrailingZeroes(num);
editText.setText(num);
} else
editText.setText(String.valueOf(number));
lastNumber = currentNumber;
currentNumber = parseDouble(editText.getText().toString());
} catch (NumberFormatException e) {
e.printStackTrace();
}
}
private double parseDouble(String str) throws NumberFormatException {
return Double.parseDouble(str.replace(",","."));
}
private String removeTrailingZeroes(String num) {
NumberFormat nf = NumberFormat.getInstance();
if (nf instanceof DecimalFormat) {
DecimalFormatSymbols sym = ((DecimalFormat) nf).getDecimalFormatSymbols();
char decSeparator = sym.getDecimalSeparator();
String[] split = num.split((decSeparator == '.' ? "\\" : "") + String.valueOf(decSeparator));
if (split.length == 2 && split[1].replace("0", "").isEmpty())
num = split[0];
}
return num;
}
public void setNumber(String number, boolean notifyListener){
setNumber(number);
if (notifyListener)
callListener(this);
}
public void setOnClickListener(OnClickListener onClickListener) {
mListener = onClickListener;
}
public void setOnValueChangeListener(OnValueChangeListener onValueChangeListener){
this.onValueChangeListener = onValueChangeListener;
}
public interface OnClickListener {
void onClick(View view);
}
public interface OnValueChangeListener {
void onValueChange(DecimalPicker view, double oldValue, double newValue);
}
public void setRange(Double startingNumber, Double endingNumber) {
initialNumber = startingNumber;
finalNumber = endingNumber;
}
public void setFormat(String format){
this.format = format;
}
}
/layout/decimal_picker.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_gravity="center_horizontal"
android:layout_width="wrap_content"
android:id="@+id/decimal_picker_layout"
android:layout_height="wrap_content">
<Button
android:id="@+id/subtract_btn"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="match_parent"
android:text="-"
android:background="@android:color/transparent" />
<EditText
android:id="@+id/number_counter"
android:gravity="center"
android:imeOptions="flagNoExtractUi"
android:inputType="numberDecimal"
android:text = "1"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="match_parent"
android:background="@android:color/transparent" />
<Button
android:id="@+id/add_btn"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="match_parent"
android:text="+"
android:background="@android:color/transparent" />
</LinearLayout>
/drawable/decimal_picker_shape.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
<corners android:radius="4dp" />
</shape>
/values/attrs.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="DecimalPicker">
<attr name="backGroundColor" format="color"/>
<attr name="initialNumber" format="integer"/>
<attr name="finalNumber" format="integer" />
<attr name="textColor" format="color"/>
<attr name="textSize" format="dimension"/>
<attr name="backgroundDrawable" format="reference"/>
<attr name="decimalFormat" format="reference"/>
</declare-styleable>
</resources>
在/values/colors.xml 中添加<color name="colorText">#FFFFFF</color>
用法示例:
在您的活动布局中
<path.to.your.DecimalPicker
android:id="@+id/decimal_picker"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16sp"/>
在您的Activity#onCreate()位置
DecimalPicker decimalPicker = (DecimalPicker) view.findViewById(R.id.decimal_picker);
decimalPicker.setFormat("%.3f");//Weight format
decimalPicker.setOnValueChangeListener(new DecimalPicker.OnValueChangeListener() {
@Override
public void onValueChange(DecimalPicker picker, double oldValue, double newValue) {
//Do what you want to handle value change.
}
});
努力的结果: 单击+/-将更改数字的整数部分.如果要更改小数部分，请单击数字并手动进行编辑.如果没有小数部分，您将只会看到没有零的整数部分.
The result of efforts: Click on +/- will change integer part of number. If you want to change fractional part - click on number and edit it by hands. If there is no fractional part you will see a integer part only without zeroes.
这篇关于Android Numberpicker小数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
