Android中自定义RatingBar

package com.example.ratingbar;

import java.util.ArrayList;

import android.content.Context;
import android.content.res.TypedArray;
import android.os.Parcel;
import android.os.Parcelable;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class Rating extends ViewGroup {

/*
* 四张图片
*/
private int[] pictures;

private ArrayList<TextView> array = new ArrayList<TextView>();

/*
* 当前的位置
*/
private int position = 0;

/*
* 總的數據的長度
*/
private int length = 0;
/*
* 间隔
*/
private int jiange = 0;
//
private int xingWidth = 0;
private int xingHeight = 0;

public Rating(Context context, AttributeSet attrs, int defStyleAttr,
int defStyleRes) {
this(context, attrs);
}

public Rating(Context context, AttributeSet attrs, int defStyleAttr) {
this(context, attrs);
}

public Rating(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
pictures = new int[4];

TypedArray a = context.obtainStyledAttributes(attrs,
R.styleable.Rating);
pictures[0] = a.getResourceId(R.styleable.Rating_graySchedule,
R.drawable.line_grey);
pictures[1] = a.getResourceId(R.styleable.Rating_highSchedule,
R.drawable.line_yellow);
pictures[2] = a.getResourceId(R.styleable.Rating_grayRating,
R.drawable.xing1);
pictures[3] = a.getResourceId(R.styleable.Rating_highRating,
R.drawable.xing2);
jiange = a.getInt(R.styleable.Rating_jiange, (int) TypedValue
.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 5, getResources()
.getDisplayMetrics()));
a.recycle();

for (int i = 0; i < 6; i++) {
// ImageView imageView = new ImageView(getContext());
TextView textView = new TextView(getContext());
if (i == 0) {
textView.setBackgroundResource(pictures[2]);
textView.setText(String.valueOf(i));
} else {
textView.setBackgroundResource(pictures[0]);
}
textView.setGravity(Gravity.CENTER);
ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
MarginLayoutParams params2 = new MarginLayoutParams(params);
textView.setLayoutParams(params2);
addView(textView);
array.add(textView);
}
length = array.size();
}

public Rating(Context context) {
this(context, null);
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// TODO Auto-generated method stub
/**
* 获得此ViewGroup上级容器为其推荐的宽和高，以及计算模式
*/
int widthMode = MeasureSpec.getMode(widthMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
int sizeWidth = MeasureSpec.getSize(widthMeasureSpec);
int sizeHeight = MeasureSpec.getSize(heightMeasureSpec);

// 计算出所有的childView的宽和高
measureChildren(widthMeasureSpec, heightMeasureSpec);

int cCount = getChildCount();

int cWidth = 0;
int cHeight = 0;
MarginLayoutParams cParams = null;

int maxHeight = 0;
int maxWidth = 0;

//
int mW = 0;
/**
* 根据childView计算的出的宽和高，以及设置的margin计算容器的宽和高，主要用于容器是warp_content时
*/
for (int i = 0; i < cCount; i++) {
View childView = getChildAt(i);
cWidth = childView.getMeasuredWidth();
cHeight = childView.getMeasuredHeight();
cParams = (MarginLayoutParams) childView.getLayoutParams();

if (i == 0) {
maxHeight = cHeight + cParams.topMargin + cParams.bottomMargin;
mW = cWidth + cParams.leftMargin + cParams.rightMargin;
} else {
int t1 = cWidth + cParams.leftMargin + cParams.rightMargin;
if (t1 > mW) {
mW = t1;
}
int t2 = cHeight + cParams.topMargin + cParams.bottomMargin;
if (t2 > maxHeight) {
maxHeight = t2;
}
}
xingWidth = mW;
xingHeight = maxHeight;
maxWidth += cWidth + cParams.leftMargin + cParams.rightMargin;
}
maxWidth += (length - 1) * jiange;
/**
* 如果是wrap_content设置为我们计算的值 否则：直接设置为父容器计算的值
*/
setMeasuredDimension((widthMode == MeasureSpec.EXACTLY) ? sizeWidth
: maxWidth, (heightMode == MeasureSpec.EXACTLY) ? sizeHeight
: maxHeight);
}

@Override
public ViewGroup.LayoutParams generateLayoutParams(AttributeSet attrs) {
return new MarginLayoutParams(getContext(), attrs);
}

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
// TODO Auto-generated method stub
int height = getHeight();

int cCount = getChildCount();
int cWidth = 0;
int cHeight = 0;
MarginLayoutParams cParams = null;

int h = 0;
/**
* 遍历所有childView根据其宽和高，以及margin进行布局
*/
for (int i = 0; i < cCount; i++) {
View childView = getChildAt(i);
cWidth = childView.getMeasuredWidth();
cHeight = childView.getMeasuredHeight();
cParams = (MarginLayoutParams) childView.getLayoutParams();

int cl = 0, ct = 0, cr = 0, cb = 0;
cl = cParams.leftMargin + h;
ct = (height - cHeight) / 2 - cParams.topMargin;
// ct = cParams.topMargin;
cr = cl + cWidth + cParams.rightMargin;
cb = cHeight + ct;
h = cr + jiange;
childView.layout(cl, ct, cr, cb);
}

}

@Override
public boolean onTouchEvent(MotionEvent event) {
// TODO Auto-generated method stub
if (xingWidth == 0 || xingHeight == 0) {
return super.onTouchEvent(event);
}
int x = (int) event.getX();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
if (!dealPosition(x)) {
return super.onTouchEvent(event);
}
int number = x / (xingWidth + jiange);
if (number + 1 > length) {
return super.onTouchEvent(event);
} else {
dealHuaMian(number);
// array.get(number).setBackgroundResource(R.drawable.xing1);
}
break;
case MotionEvent.ACTION_UP:

break;
case MotionEvent.ACTION_MOVE:

break;
}
return super.onTouchEvent(event);
}

/*
* 处理坐标的问题
*/
private boolean dealPosition(int x) {
int t = x % (jiange + xingWidth);
if (t > xingWidth && t < xingWidth + jiange) {
return false;
} else {
return true;
}
}

/*
* 处理显示的画面
*/
private void dealHuaMian(int p) {
if (p < 0) {
return;
}
if (p + 1 > length) {
return;
}
if (p == position) {
// 不需要任何处理
} else if (p > position) {
// 向前
for (int i = position; i <= p - 1; i++) {
TextView textView = array.get(i);
textView.setBackgroundResource(pictures[1]);
textView.setText("");
}
TextView tv = array.get(p);
tv.setBackgroundResource(pictures[3]);
tv.setText(String.valueOf(p));
} else if (p < position) {
// 向后
for (int i = position; i >= p + 1; i--) {
TextView textView = array.get(i);
textView.setBackgroundResource(pictures[0]);
textView.setText("");
}
TextView tv = array.get(p);
if (p == 0) {
tv.setBackgroundResource(pictures[2]);
} else {
tv.setBackgroundResource(pictures[3]);
}
tv.setText(String.valueOf(p));
}
position = p;
}

@Override
protected Parcelable onSaveInstanceState() {
// TODO Auto-generated method stub
Parcelable superState = super.onSaveInstanceState();
SavedState ss = new SavedState(superState);
ss.state = position;
return ss;
}

@Override
protected void onRestoreInstanceState(Parcelable state) {
// TODO Auto-generated method stub
SavedState ss = (SavedState) state;
super.onRestoreInstanceState(ss.getSuperState());
position = ss.state;
refreshDate();
}

/*
* 重新刷新数据
*/
private void refreshDate() {
for (int i = 0; i < position; i++) {
TextView textView = array.get(i);
textView.setBackgroundResource(pictures[1]);
textView.setText("");
}
TextView tv = array.get(position);
if (position == 0) {
tv.setBackgroundResource(pictures[2]);
} else {
tv.setBackgroundResource(pictures[3]);
}
tv.setText(String.valueOf(position));
}

static class SavedState extends BaseSavedState {
private int state;

SavedState(Parcelable superState) {
super(superState);
}

private SavedState(Parcel in) {
super(in);
state = in.readInt();
}

@Override
public void writeToParcel(Parcel out, int flags) {
super.writeToParcel(out, flags);
out.writeInt(state);
}

public static final Parcelable.Creator<SavedState> CREATOR = new Parcelable.Creator<SavedState>() {
public SavedState createFromParcel(Parcel in) {
return new SavedState(in);
}

public SavedState[] newArray(int size) {
return new SavedState[size];
}
};
}

// 接口
/*
* 取得当前的评分数目
*/
public int getRatingNumber() {
return position;
}

/*
* 设置图像
*/
public void setRatingPictures(int p1, int p2, int p3, int p4) {
pictures[0] = p1;
pictures[1] = p2;
pictures[2] = p3;
pictures[3] = p4;
}

}

<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="Rating">
<attr name="grayRating" format="reference" />
<attr name="highRating" format="reference" />
<attr name="graySchedule" format="reference" />
<attr name="highSchedule" format="reference" />
<attr name="jiange" format="integer" />
</declare-styleable>

</resources>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity"
android:orientation="vertical"
xmlns:app="http://schemas.android.com/apk/res/com.example.ratingbar">
<!--  xmlns:example="http://schemas.android.com/apk/res/com.example.ratingbar" -->

<com.example.ratingbar.Rating
android:id="@+id/rating1"
app:jiange="10"
app:graySchedule="@drawable/line_grey"
app:highSchedule="@drawable/line_yellow"
app:grayRating="@drawable/xing1"
app:highRating="@drawable/xing2"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<com.example.ratingbar.Rating
android:id="@+id/rating2"
app:jiange="10"
app:graySchedule="@drawable/line_grey"
app:highSchedule="@drawable/line_yellow"
app:grayRating="@drawable/xing1"
app:highRating="@drawable/xing2"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<com.example.ratingbar.Rating
android:id="@+id/rating3"
app:jiange="10"
app:graySchedule="@drawable/line_grey"
app:highSchedule="@drawable/line_yellow"
app:grayRating="@drawable/xing1"
app:highRating="@drawable/xing2"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<com.example.ratingbar.Rating
android:id="@+id/rating4"
app:jiange="10"
app:graySchedule="@drawable/line_grey"
app:highSchedule="@drawable/line_yellow"
app:grayRating="@drawable/xing1"
app:highRating="@drawable/xing2"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<com.example.ratingbar.Rating
android:id="@+id/rating5"
app:jiange="10"
app:graySchedule="@drawable/line_grey"
app:highSchedule="@drawable/line_yellow"
app:grayRating="@drawable/xing1"
app:highRating="@drawable/xing2"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<com.example.ratingbar.Rating
android:id="@+id/rating6"
app:jiange="10"
app:graySchedule="@drawable/line_grey"
app:highSchedule="@drawable/line_yellow"
app:grayRating="@drawable/xing1"
app:highRating="@drawable/xing2"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

</LinearLayout>