带有增加与减少按钮的数量选择控件QuantityView

带有增加与减少按钮的数量选择控件



用法：
<me.himanshusoni.quantityview.QuantityView
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/quantityView_default"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="10dp"
    app:qv_quantity="10" />

自定义
属性:

app:qv_addButtonBackground="color|drawable"app:qv_addButtonText="string"app:qv_addButtonTextColor="color"app:qv_removeButtonBackground="color|drawable"app:qv_removeButtonText="string"app:qv_removeButtonTextColor="color"app:qv_quantityBackground="color|drawable"app:qv_quantityTextColor="color"app:qv_quantity="integer"app:qv_quantityPadding="dimension"app:qv_maxQuantity="integer"app:qv_minQuantity="integer"

import android.annotation.TargetApi;import android.content.Context;import android.content.DialogInterface;import android.content.res.TypedArray;import android.graphics.Color;import android.graphics.drawable.Drawable;import android.os.Build;import android.support.v4.content.ContextCompat;import android.support.v7.app.AlertDialog;import android.util.AttributeSet;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.LinearLayout;import android.widget.TextView;/** * Quantity view to add and remove quantities */public class QuantityView extends LinearLayout implements View.OnClickListener {    private Drawable quantityBackground, addButtonBackground, removeButtonBackground;    private String addButtonText, removeButtonText;    private int quantity, maxQuantity, minQuantity;    private int quantityPadding;    private int quantityTextColor, addButtonTextColor, removeButtonTextColor;    private Button mButtonAdd, mButtonRemove;    private TextView mTextViewQuantity;    public interface OnQuantityChangeListener {        void onQuantityChanged(int newQuantity, boolean programmatically);        void onLimitReached();    }    private OnQuantityChangeListener onQuantityChangeListener;    public QuantityView(Context context) {        super(context);        init(null, 0);    }    public QuantityView(Context context, AttributeSet attrs) {        super(context, attrs);        init(attrs, 0);    }    public QuantityView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        init(attrs, defStyle);    }    @TargetApi(Build.VERSION_CODES.JELLY_BEAN)    private void init(AttributeSet attrs, int defStyle) {        final TypedArray a = getContext().obtainStyledAttributes(attrs, R.styleable.QuantityView, defStyle, 0);        addButtonText = getResources().getString(R.string.qv_add);        if (a.hasValue(R.styleable.QuantityView_qv_addButtonText)) {            addButtonText = a.getString(R.styleable.QuantityView_qv_addButtonText);        }        addButtonBackground = ContextCompat.getDrawable(getContext(), R.drawable.qv_btn_selector);        if (a.hasValue(R.styleable.QuantityView_qv_addButtonBackground)) {            addButtonBackground = a.getDrawable(R.styleable.QuantityView_qv_addButtonBackground);        }        addButtonTextColor = a.getColor(R.styleable.QuantityView_qv_addButtonTextColor, Color.BLACK);        removeButtonText = getResources().getString(R.string.qv_remove);        if (a.hasValue(R.styleable.QuantityView_qv_removeButtonText)) {            removeButtonText = a.getString(R.styleable.QuantityView_qv_removeButtonText);        }        removeButtonBackground = ContextCompat.getDrawable(getContext(), R.drawable.qv_btn_selector);        if (a.hasValue(R.styleable.QuantityView_qv_removeButtonBackground)) {            removeButtonBackground = a.getDrawable(R.styleable.QuantityView_qv_removeButtonBackground);        }        removeButtonTextColor = a.getColor(R.styleable.QuantityView_qv_removeButtonTextColor, Color.BLACK);        quantity = a.getInt(R.styleable.QuantityView_qv_quantity, 0);        maxQuantity = a.getInt(R.styleable.QuantityView_qv_maxQuantity, Integer.MAX_VALUE);        minQuantity = a.getInt(R.styleable.QuantityView_qv_minQuantity, 0);        quantityPadding = (int) a.getDimension(R.styleable.QuantityView_qv_quantityPadding, pxFromDp(24));        quantityTextColor = a.getColor(R.styleable.QuantityView_qv_quantityTextColor, Color.BLACK);        quantityBackground = ContextCompat.getDrawable(getContext(), R.drawable.qv_bg_selector);        if (a.hasValue(R.styleable.QuantityView_qv_quantityBackground)) {            quantityBackground = a.getDrawable(R.styleable.QuantityView_qv_quantityBackground);        }        a.recycle();        int dp10 = pxFromDp(10);        mButtonAdd = new Button(getContext());        mButtonAdd.setGravity(Gravity.CENTER);        mButtonAdd.setPadding(dp10, dp10, dp10, dp10);        mButtonAdd.setMinimumHeight(0);        mButtonAdd.setMinimumWidth(0);        mButtonAdd.setMinHeight(0);        mButtonAdd.setMinWidth(0);        setAddButtonBackground(addButtonBackground);        setAddButtonText(addButtonText);        setAddButtonTextColor(addButtonTextColor);        mButtonRemove = new Button(getContext());        mButtonRemove.setGravity(Gravity.CENTER);        mButtonRemove.setPadding(dp10, dp10, dp10, dp10);        mButtonRemove.setMinimumHeight(0);        mButtonRemove.setMinimumWidth(0);        mButtonRemove.setMinHeight(0);        mButtonRemove.setMinWidth(0);        setRemoveButtonBackground(removeButtonBackground);        setRemoveButtonText(removeButtonText);        setRemoveButtonTextColor(removeButtonTextColor);        mTextViewQuantity = new TextView(getContext());        mTextViewQuantity.setGravity(Gravity.CENTER);        setQuantityTextColor(quantityTextColor);        setQuantity(quantity);        setQuantityBackground(quantityBackground);        setQuantityPadding(quantityPadding);        setOrientation(HORIZONTAL);        addView(mButtonRemove, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);        addView(mTextViewQuantity, LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);        addView(mButtonAdd, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);        mButtonAdd.setOnClickListener(this);        mButtonRemove.setOnClickListener(this);        mTextViewQuantity.setOnClickListener(this);    }    @Override    public void onClick(View v) {        if (v == mButtonAdd) {            if (quantity + 1 > maxQuantity) {                if (onQuantityChangeListener != null) onQuantityChangeListener.onLimitReached();            } else {                quantity += 1;                mTextViewQuantity.setText(String.valueOf(quantity));                if (onQuantityChangeListener != null)                    onQuantityChangeListener.onQuantityChanged(quantity, false);            }        } else if (v == mButtonRemove) {            if (quantity - 1 < minQuantity) {                if (onQuantityChangeListener != null) onQuantityChangeListener.onLimitReached();            } else {                quantity -= 1;                mTextViewQuantity.setText(String.valueOf(quantity));                if (onQuantityChangeListener != null)                    onQuantityChangeListener.onQuantityChanged(quantity, false);            }        } else if (v == mTextViewQuantity) {            AlertDialog.Builder builder = new AlertDialog.Builder(getContext());            builder.setTitle("Change Quantity");            View inflate = LayoutInflater.from(getContext()).inflate(R.layout.qv_dialog_changequantity, null, false);            final EditText et = (EditText) inflate.findViewById(R.id.qv_et_change_qty);            et.setText(String.valueOf(quantity));            builder.setView(inflate);            builder.setPositiveButton("Change", new DialogInterface.OnClickListener() {                @Override                public void onClick(DialogInterface dialog, int which) {                    String newQuantity = et.getText().toString();                    if (isNumber(newQuantity)) {                        int intNewQuantity = Integer.parseInt(newQuantity);                        setQuantity(intNewQuantity);                    }                }            }).setNegativeButton("Cancel", null);            builder.show();        }    }    public OnQuantityChangeListener getOnQuantityChangeListener() {        return onQuantityChangeListener;    }    public void setOnQuantityChangeListener(OnQuantityChangeListener onQuantityChangeListener) {        this.onQuantityChangeListener = onQuantityChangeListener;    }    public Drawable getQuantityBackground() {        return quantityBackground;    }    public void setQuantityBackground(Drawable quantityBackground) {        this.quantityBackground = quantityBackground;        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {            mTextViewQuantity.setBackground(quantityBackground);        } else {            mTextViewQuantity.setBackgroundDrawable(quantityBackground);        }    }    public Drawable getAddButtonBackground() {        return addButtonBackground;    }    public void setAddButtonBackground(Drawable addButtonBackground) {        this.addButtonBackground = addButtonBackground;        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {            mButtonAdd.setBackground(addButtonBackground);        } else {            mButtonAdd.setBackgroundDrawable(addButtonBackground);        }    }    public Drawable getRemoveButtonBackground() {        return removeButtonBackground;    }    public void setRemoveButtonBackground(Drawable removeButtonBackground) {        this.removeButtonBackground = removeButtonBackground;        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {            mButtonRemove.setBackground(removeButtonBackground);        } else {            mButtonRemove.setBackgroundDrawable(removeButtonBackground);        }    }    public String getAddButtonText() {        return addButtonText;    }    public void setAddButtonText(String addButtonText) {        this.addButtonText = addButtonText;        mButtonAdd.setText(addButtonText);    }    public String getRemoveButtonText() {        return removeButtonText;    }    public void setRemoveButtonText(String removeButtonText) {        this.removeButtonText = removeButtonText;        mButtonRemove.setText(removeButtonText);    }    public int getQuantity() {        return quantity;    }    public void setQuantity(int quantity) {        boolean limitReached = false;        if (quantity > maxQuantity) {            quantity = maxQuantity;            limitReached = true;            if (onQuantityChangeListener != null) onQuantityChangeListener.onLimitReached();        }        if (quantity < minQuantity) {            quantity = minQuantity;            limitReached = true;            if (onQuantityChangeListener != null) onQuantityChangeListener.onLimitReached();        }        if (!limitReached && onQuantityChangeListener != null)            onQuantityChangeListener.onQuantityChanged(quantity, true);        this.quantity = quantity;        mTextViewQuantity.setText(String.valueOf(this.quantity));    }    public int getMaxQuantity() {        return maxQuantity;    }    public void setMaxQuantity(int maxQuantity) {        this.maxQuantity = maxQuantity;    }    public int getMinQuantity() {        return minQuantity;    }    public void setMinQuantity(int minQuantity) {        this.minQuantity = minQuantity;    }    public int getQuantityPadding() {        return quantityPadding;    }    public void setQuantityPadding(int quantityPadding) {        this.quantityPadding = quantityPadding;        mTextViewQuantity.setPadding(quantityPadding, 0, quantityPadding, 0);    }    public int getQuantityTextColor() {        return quantityTextColor;    }    public void setQuantityTextColor(int quantityTextColor) {        this.quantityTextColor = quantityTextColor;        mTextViewQuantity.setTextColor(quantityTextColor);    }    public void setQuantityTextColorRes(int quantityTextColorRes) {        this.quantityTextColor = ContextCompat.getColor(getContext(), quantityTextColorRes);        mTextViewQuantity.setTextColor(quantityTextColor);    }    public int getAddButtonTextColor() {        return addButtonTextColor;    }    public void setAddButtonTextColor(int addButtonTextColor) {        this.addButtonTextColor = addButtonTextColor;        mButtonAdd.setTextColor(addButtonTextColor);    }    public void setAddButtonTextColorRes(int addButtonTextColorRes) {        this.addButtonTextColor = ContextCompat.getColor(getContext(), addButtonTextColorRes);        mButtonAdd.setTextColor(addButtonTextColor);    }    public int getRemoveButtonTextColor() {        return removeButtonTextColor;    }    public void setRemoveButtonTextColor(int removeButtonTextColor) {        this.removeButtonTextColor = removeButtonTextColor;        mButtonRemove.setTextColor(removeButtonTextColor);    }    public void setRemoveButtonTextColorRes(int removeButtonTextColorRes) {        this.removeButtonTextColor = ContextCompat.getColor(getContext(), removeButtonTextColorRes);        mButtonRemove.setTextColor(removeButtonTextColor);    }    private int dpFromPx(final float px) {        return (int) (px / getResources().getDisplayMetrics().density);    }    private int pxFromDp(final float dp) {        return (int) (dp * getResources().getDisplayMetrics().density);    }    private boolean isNumber(String string) {        try {            Integer.parseInt(string);            return true;        } catch (Exception e) {            return false;        }    }}

qv_dialog_changequantity.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">    <EditText        android:id="@+id/qv_et_change_qty"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_margin="10dp"        android:inputType="number" /></LinearLayout>

attr.xml

<resources>    <declare-styleable name="QuantityView">        <attr name="qv_addButtonText" format="string" />        <attr name="qv_addButtonBackground" format="color|reference" />        <attr name="qv_addButtonTextColor" format="color" />        <attr name="qv_removeButtonText" format="string" />        <attr name="qv_removeButtonBackground" format="color|reference" />        <attr name="qv_removeButtonTextColor" format="color" />        <attr name="qv_quantity" format="integer" />        <attr name="qv_quantityBackground" format="color|reference" />        <attr name="qv_quantityTextColor" format="color" />        <attr name="qv_quantityPadding" format="dimension" />        <attr name="qv_maxQuantity" format="integer" />        <attr name="qv_minQuantity" format="integer" />    </declare-styleable></resources>

string.xml

<string name="qv_add">+</string><string name="qv_remove">-</string>

drawable:
qv_bg_selector.xml

<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android">    <item android:state_pressed="true">        <shape android:shape="rectangle">            <solid android:color="#ddd" />        </shape>    </item>    <item android:state_selected="true">        <shape android:shape="rectangle">            <solid android:color="#ddd" />        </shape>    </item>    <item>        <shape android:shape="rectangle">            <solid android:color="#eee" />        </shape>    </item></selector>

qv_btn_selector.xml

<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android">    <item android:state_pressed="true">        <shape android:shape="rectangle">            <solid android:color="#ccc" />        </shape>    </item>    <item android:state_selected="true">        <shape android:shape="rectangle">            <solid android:color="#ccc" />        </shape>    </item>    <item>        <shape android:shape="rectangle">            <solid android:color="#ddd" />        </shape>    </item></selector>