package com.fuban.user.views;
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import android.content.Context;
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import android.content.res.TypedArray;
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import android.graphics.drawable.Drawable;
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import android.util.AttributeSet;
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import android.view.View;
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import android.widget.ImageView;
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import android.widget.LinearLayout;
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import com.fuban.user.R;
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import java.math.BigDecimal;
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/**
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* Created by dylan on 2015/6/11.
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* 自定义打分控件RatingBar
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* 可以自定义星星大小和间距
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* Correction clickEvent from Xml
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*/
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public class RatingBar extends LinearLayout {
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/**
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* 是否可点击
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*/
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private boolean mClickable;
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/**
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* 星星总数
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*/
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private int starCount;
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/**
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* 星星的点击事件
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*/
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private OnRatingChangeListener onRatingChangeListener;
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/**
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* 每个星星的大小
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*/
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private float starImageSize;
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/**
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* 每个星星的间距
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*/
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private float starPadding;
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/**
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* 星星的显示数量，支持小数点
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*/
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private float starStep;
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/**
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* 空白的默认星星图片
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*/
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private Drawable starEmptyDrawable;
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/**
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* 选中后的星星填充图片
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*/
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private Drawable starFillDrawable;
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/**
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* 半颗星的图片
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*/
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private Drawable starHalfDrawable;
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/**
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* 每次点击星星所增加的量是整个还是半个
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*/
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private StepSize stepSize;
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/**
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* 设置半星的图片资源文件
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*
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* @param starHalfDrawable
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*/
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public void setStarHalfDrawable(Drawable starHalfDrawable) {
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this.starHalfDrawable = starHalfDrawable;
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}
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/**
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* 设置满星的图片资源文件
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*
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* @param starFillDrawable
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*/
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public void setStarFillDrawable(Drawable starFillDrawable) {
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this.starFillDrawable = starFillDrawable;
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}
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/**
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* 设置空白和默认的图片资源文件
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*
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* @param starEmptyDrawable
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*/
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public void setStarEmptyDrawable(Drawable starEmptyDrawable) {
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this.starEmptyDrawable = starEmptyDrawable;
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}
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/**
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* 设置星星是否可以点击操作
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*
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* @param clickable
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*/
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public void setClickable(boolean clickable) {
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this.mClickable = clickable;
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}
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public boolean getClickable() {
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return this.mClickable;
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}
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/**
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* 设置星星点击事件
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*
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* @param onRatingChangeListener
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*/
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public void setOnRatingChangeListener(OnRatingChangeListener onRatingChangeListener) {
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this.onRatingChangeListener = onRatingChangeListener;
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}
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/**
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* 设置星星的大小
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*
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* @param starImageSize
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*/
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public void setStarImageSize(float starImageSize) {
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this.starImageSize = starImageSize;
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}
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public void setStepSize(StepSize stepSize) {
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this.stepSize = stepSize;
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}
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/**
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* 构造函数
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* 获取xml中设置的资源文件
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*
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* @param context
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* @param attrs
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*/
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public RatingBar(Context context, AttributeSet attrs) {
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super(context, attrs);
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setOrientation(LinearLayout.HORIZONTAL);
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TypedArray mTypedArray = context.obtainStyledAttributes(attrs, R.styleable.RatingBar);
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starImageSize = mTypedArray.getDimension(R.styleable.RatingBar_starImageSize, 20);
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starPadding = mTypedArray.getDimension(R.styleable.RatingBar_starPadding, 10);
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starStep = mTypedArray.getFloat(R.styleable.RatingBar_starStep, 1.0f);
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stepSize = StepSize.fromStep(mTypedArray.getInt(R.styleable.RatingBar_stepSize, 1));
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starCount = mTypedArray.getInteger(R.styleable.RatingBar_starCount, 5);
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starEmptyDrawable = mTypedArray.getDrawable(R.styleable.RatingBar_starEmpty);
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starFillDrawable = mTypedArray.getDrawable(R.styleable.RatingBar_starFill);
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starHalfDrawable = mTypedArray.getDrawable(R.styleable.RatingBar_starHalf);
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mClickable = mTypedArray.getBoolean(R.styleable.RatingBar_clickable, true);
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mTypedArray.recycle();
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for (int i = 0; i < starCount; ++i) {
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final ImageView imageView = getStarImageView();
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imageView.setImageDrawable(starEmptyDrawable);
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imageView.setOnClickListener(
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new OnClickListener() {
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@Override
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public void onClick(View v) {
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if (mClickable) {
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//浮点数的整数部分
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int fint = (int) starStep;
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BigDecimal b1 = new BigDecimal(Float.toString(starStep));
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BigDecimal b2 = new BigDecimal(Integer.toString(fint));
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//浮点数的小数部分
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float fPoint = b1.subtract(b2).floatValue();
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if (fPoint == 0) {
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fint -= 1;
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}
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if (indexOfChild(v) > fint) {
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setStar(indexOfChild(v) + 1);
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} else if (indexOfChild(v) == fint) {
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if (stepSize == StepSize.Full) {//如果是满星 就不考虑半颗星了
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return;
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}
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//点击之后默认每次先增加一颗星，再次点击变为半颗星
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if (imageView.getDrawable().getCurrent().getConstantState().equals(starHalfDrawable.getConstantState())) {
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setStar(indexOfChild(v) + 1);
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} else {
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setStar(indexOfChild(v) + 0.5f);
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}
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} else {
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setStar(indexOfChild(v) + 1f);
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}
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}
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}
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}
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);
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addView(imageView);
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}
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setStar(starStep);
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}
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/**
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* 设置每颗星星的参数
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*
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* @return
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*/
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private ImageView getStarImageView() {
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ImageView imageView = new ImageView(getContext());
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LayoutParams layout = new LayoutParams(
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Math.round(starImageSize), Math.round(starImageSize));//设置每颗星星在线性布局的大小
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layout.setMargins(0, 0, Math.round(starPadding), 0);//设置每颗星星在线性布局的间距
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imageView.setLayoutParams(layout);
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imageView.setAdjustViewBounds(true);
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imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
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imageView.setImageDrawable(starEmptyDrawable);
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imageView.setMinimumWidth(10);
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imageView.setMaxHeight(10);
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return imageView;
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}
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/**
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* 设置星星的个数
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*
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* @param rating
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*/
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public void setStar(float rating) {
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if (onRatingChangeListener != null) {
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onRatingChangeListener.onRatingChange(rating);
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}
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this.starStep = rating;
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//浮点数的整数部分
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int fint = (int) rating;
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BigDecimal b1 = new BigDecimal(Float.toString(rating));
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BigDecimal b2 = new BigDecimal(Integer.toString(fint));
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//浮点数的小数部分
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float fPoint = b1.subtract(b2).floatValue();
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//设置选中的星星
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for (int i = 0; i < fint; ++i) {
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((ImageView) getChildAt(i)).setImageDrawable(starFillDrawable);
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}
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//设置没有选中的星星
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for (int i = fint; i < starCount; i++) {
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((ImageView) getChildAt(i)).setImageDrawable(starEmptyDrawable);
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}
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//小数点默认增加半颗星
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if (fPoint > 0) {
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((ImageView) getChildAt(fint)).setImageDrawable(starHalfDrawable);
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}
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}
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/**
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* 操作星星的点击事件
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*/
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public interface OnRatingChangeListener {
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/**
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* 选中的星星的个数
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*
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* @param
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*/
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void onRatingChange(float ratingCount);
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}
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/**
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* 星星每次增加的方式整星还是半星，枚举类型
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* 类似于View.GONE
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*/
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public enum StepSize {
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Half(0), Full(1);
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int step;
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StepSize(int step) {
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this.step = step;
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}
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public static StepSize fromStep(int step) {
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for (StepSize f : values()) {
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if (f.step == step) {
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return f;
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}
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}
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throw new IllegalArgumentException();
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}
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}
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}
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