Android之自定义view星星评价(可滑动)

package com.aoyi.aoyinongchang.utils;import android.content.Context; import android.content.SharedPreferences; import android.content.res.TypedArray; import android.graphics.Bitmap; import android.graphics.BitmapShader; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.drawable.Drawable; import android.util.AttributeSet; import android.util.Log; import android.view.MotionEvent; import android.view.View;import com.aoyi.aoyinongchang.R; import com.aoyi.aoyinongchang.YourApplication; import com.videogo.openapi.EZOpenSDK;/*** Created by qzs on 2016/7/18.**/ public class StarBar extends View{public Context context;private int starDistance = 0; //星星间距private int starCount = 5; //星星个数private int starSize; //星星高度大小，星星一般正方形，宽度等于高度private int starMark = 0; //评分星星private Bitmap starFillBitmap; //亮星星private Drawable starEmptyDrawable; //暗星星private OnStarChangeListener onStarChangeListener;//监听星星变化接口private Paint paint; //绘制星星画笔private boolean integerMark = false;public StarBar(Context context, AttributeSet attrs) {super(context, attrs);this.context=context;init(context, attrs);}public StarBar(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);this.context=context;init(context, attrs);}/*** 初始化UI组件** @param context* @param attrs*/private void init(Context context, AttributeSet attrs){setClickable(true);TypedArray mTypedArray = context.obtainStyledAttributes(attrs, R.styleable.RatingBar);this.starDistance = (int) mTypedArray.getDimension(R.styleable.RatingBar_starDistance, 0);this.starSize = (int) mTypedArray.getDimension(R.styleable.RatingBar_starSize, 20);this.starCount = mTypedArray.getInteger(R.styleable.RatingBar_starCount, 5);this.starEmptyDrawable = mTypedArray.getDrawable(R.styleable.RatingBar_starEmpty);this.starFillBitmap = drawableToBitmap(mTypedArray.getDrawable(R.styleable.RatingBar_starFill));mTypedArray.recycle();paint = new Paint();paint.setAntiAlias(true);paint.setShader(new BitmapShader(starFillBitmap, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));}/*** 设置是否需要整数评分* @param integerMark*/public void setIntegerMark(boolean integerMark){this.integerMark = integerMark;}/*** 设置显示的星星的分数** @param mark*/public void setStarMark(int mark){if (integerMark) {starMark = (int)Math.ceil(mark);}else {starMark = Math.round(mark * 10) * 1 / 10;}if (this.onStarChangeListener != null) {this.onStarChangeListener.onStarChange(starMark); //调用监听接口}invalidate();}/*** 获取显示星星的数目** @return starMark*/public int getStarMark(){return starMark;}/*** 定义星星点击的监听接口*/public interface OnStarChangeListener {void onStarChange(int mark);}/*** 设置监听* @param onStarChangeListener*/public void setOnStarChangeListener(OnStarChangeListener onStarChangeListener){this.onStarChangeListener = onStarChangeListener;}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {super.onMeasure(widthMeasureSpec, heightMeasureSpec);setMeasuredDimension(starSize * starCount + starDistance * (starCount - 1), starSize);}@Overrideprotected void onDraw(Canvas canvas) {super.onDraw(canvas);if (starFillBitmap == null || starEmptyDrawable == null) {return;}for (int i = 0;i < starCount;i++) {starEmptyDrawable.setBounds((starDistance + starSize) * i, 0, (starDistance + starSize) * i + starSize, starSize);starEmptyDrawable.draw(canvas);}if (starMark > 1) {canvas.drawRect(0, 0, starSize, starSize, paint);if(starMark-(int)(starMark) == 0) {for (int i = 1; i < starMark; i++) {canvas.translate(starDistance + starSize, 0);canvas.drawRect(0, 0, starSize, starSize, paint);}}else {for (int i = 1; i < starMark - 1; i++) {canvas.translate(starDistance + starSize, 0);canvas.drawRect(0, 0, starSize, starSize, paint);}canvas.translate(starDistance + starSize, 0);canvas.drawRect(0, 0, starSize * (Math.round((starMark - (int) (starMark))*10)*1.0f/10), starSize, paint);}}else {canvas.drawRect(0, 0, starSize * starMark, starSize, paint);}}@Overridepublic boolean onTouchEvent(MotionEvent event) {int x = (int) event.getX();if (x < 0) x = 0;if (x > getMeasuredWidth()) x = getMeasuredWidth();switch(event.getAction()){case MotionEvent.ACTION_DOWN: {setStarMark(x*1 / (getMeasuredWidth()*1/starCount));break;}case MotionEvent.ACTION_MOVE: {setStarMark(x*1 / (getMeasuredWidth()*1/starCount));break;}case MotionEvent.ACTION_UP: {break;}}invalidate();return super.onTouchEvent(event);}/*** drawable转bitmap** @param drawable* @return*/private Bitmap drawableToBitmap(Drawable drawable){if (drawable == null)return null;Bitmap bitmap = Bitmap.createBitmap(starSize, starSize, Bitmap.Config.ARGB_8888);Canvas canvas = new Canvas(bitmap);drawable.setBounds(0, 0, starSize, starSize);drawable.draw(canvas);return bitmap;}} 

<com.aoyi.aoyinongchang.utils.StarBarandroid:id="@+id/starBar"android:layout_gravity="center_horizontal"ratingbar:starEmpty="@mipmap/star2"ratingbar:starFill="@mipmap/star1"ratingbar:starDistance="5dp"ratingbar:starCount="5"ratingbar:starSize="30dp"android:layout_width="wrap_content"android:layout_height="wrap_content" />