StarRatingView
package widget;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.ImageView;
import android.widget.LinearLayout;
import com.self.zsp.mutualhelp.R;
import java.util.ArrayList;
import java.util.List;
import value.Magic;
/**
* Created on 2018/5/5.
*
* @desc 评分
*/
public class StarRatingView extends LinearLayout {
/**
* 三图
*/
private Drawable on, off, half;
/**
* 点滑否
*/
private boolean ratable;
/**
* 存五颗星
*/
private List<ImageView> list;
/**
* 0-10分点x坐标,index为分,值为此分坐标
*/
private float[] points = new float[11];
/**
* 左padding
*/
private int paddingLeft;
private OnRateChangeListener onRateChangeListener;
public StarRatingView(Context context) {
super(context);
}
public StarRatingView(Context context, AttributeSet attrs) {
super(context, attrs);
TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.StarRatingView);
on = array.getDrawable(R.styleable.StarRatingView_stat_on);
off = array.getDrawable(R.styleable.StarRatingView_stat_off);
half = array.getDrawable(R.styleable.StarRatingView_stat_half);
ratable = array.getBoolean(R.styleable.StarRatingView_ratable, false);
// 半星宽
float halfStarWidth = on.getIntrinsicWidth() / 2;
// 图宽
float starWidth = on.getIntrinsicWidth();
// 间距
float padding = array.getDimension(R.styleable.StarRatingView_star_padding, starWidth / 3);
paddingLeft = getPaddingLeft();
list = new ArrayList<>();
ImageView imageView;
// 初始化五星并通points数组对应分与坐标
for (int i = 0; i < Magic.INT_W; i++) {
imageView = new ImageView(context);
LinearLayout.LayoutParams layoutParams = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
if (i != 0 && i != 4) {
layoutParams.setMargins((int) padding / 2, 0, (int) padding / 2, 0);
points[i * 2] = i * starWidth + i * padding;
points[i * 2 + 1] = points[i * 2] + halfStarWidth / 2;
}
if (i == 0) {
layoutParams.setMargins(0, 0, (int) padding / 2, 0);
points[0] = 0;
points[1] = halfStarWidth;
}
if (i == 4) {
layoutParams.setMargins((int) padding / 2, 0, 0, 0);
points[i * 2] = i * starWidth + i * padding;
points[i * 2 + 1] = points[i * 2] + halfStarWidth / 2;
points[10] = points[9] + halfStarWidth / 2;
}
imageView.setLayoutParams(layoutParams);
imageView.setImageDrawable(off);
list.add(imageView);
addView(list.get(i));
}
setOrientation(LinearLayout.HORIZONTAL);
array.recycle();
}
/**
* 据分显星
*
* @param rate 分
*/
public void setRate(int rate) {
removeAllViews();
int count = rate / 2;
boolean isOdd;
isOdd = rate % Magic.INT_ER != 0;
for (int i = 0; i < list.size(); i++) {
if (i < count) {
list.get(i).setImageDrawable(on);
} else {
list.get(i).setImageDrawable(off);
}
if (isOdd && i == count) {
list.get(i).setImageDrawable(half);
}
addView(list.get(i));
}
if (ratable && onRateChangeListener != null) {
onRateChangeListener.onRateChange(rate);
}
}
public void setOnRateChangeListener(OnRateChangeListener l) {
onRateChangeListener = l;
}
@SuppressLint("ClickableViewAccessibility")
@Override
public boolean onTouchEvent(MotionEvent event) {
// 不可滑则不处理事件
if (!ratable) {
return super.onTouchEvent(event);
}
setRate(calculateStar(event.getX()));
return true;
}
/**
* 据坐标算分
*
* @param x 坐标
* @return 分
*/
private int calculateStar(float x) {
// 减控件左padding
float realPosition = x - paddingLeft;
for (int i = 0; i < points.length; i++) {
if (points[i] > realPosition) {
return i;
}
}
// 循环结束即右滑超最大值(返10分)
return 10;
}
/**
* 分变回调
*/
public interface OnRateChangeListener {
/**
* xxx
*
* @param rate 分
*/
void onRateChange(int rate);
}
}
attrs
<!--StarRatingView-->
<declare-styleable name="StarRatingView">
<!--亮-->
<attr name="stat_on" format="reference" />
<!--关-->
<attr name="stat_off" format="reference" />
<!--半星-->
<attr name="stat_half" format="reference" />
<!--点滑评-->
<attr name="ratable" format="boolean" />
<!--间距-->
<attr name="star_padding" format="dimension" />
</declare-styleable>
布局
<widget.StarRatingView
android:id="@+id/starRatingView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:ratable="true"
app:star_padding="@dimen/d12"
app:stat_half="@drawable/star_half"
app:stat_off="@drawable/star_normal"
app:stat_on="@drawable/star_select" />
主代码
private StarRatingView starRatingView;
starRatingView = findViewById(R.id.starRatingView);
starRatingView.setOnRateChangeListener(new StarRatingView.OnRateChangeListener() {
@Override
public void onRateChange(int rate) {
score = rate;
}
});