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优化viewpager 提高性能 #1

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1 change: 1 addition & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
Expand Up @@ -6,4 +6,5 @@
.DS_Store
/build
/captures
/idea/gradle.xml
.externalNativeBuild
2 changes: 1 addition & 1 deletion .idea/gradle.xml
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64 changes: 29 additions & 35 deletions FJMtSortButtonLib/src/main/java/fj/mtsortbutton/lib/SoreButton.java
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Expand Up @@ -4,7 +4,6 @@
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;

Expand All @@ -26,12 +25,9 @@ public class SoreButton extends LinearLayout {
//圆点间距
private int distance = 10;

List<View> listSoreView = new ArrayList<>();
View soreView;
private List<Integer> listView;

//接口
private ViewControl viewControl;

//设置接口
public void setViewControl(ViewControl viewControl) {
this.viewControl = viewControl;
Expand All @@ -53,30 +49,18 @@ public SoreButton(Context context, AttributeSet attrs) {
}

//初始化ViewPager
private void initViewPager(){
listSoreView = new ArrayList<>();
LayoutInflater layoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
int size = listView.size();
for (int i = 0; i < size; i++) {
//循环拿到传入的View
soreView = layoutInflater.inflate(listView.get(i), null);
//通过接口回掉的形式返回当前的View,实现接口后开源拿到每个View然后进行操作
if (viewControl!=null){
viewControl.setView(soreView,i);
}
//将获取到的View添加到List中
listSoreView.add(soreView);
}
private void initViewPager() {
//设置viewPager的Adapter
viewPager.setAdapter(new ViewPagerAdapter(listSoreView));
viewPager.setAdapter(new ViewPagerAdapter(listView, viewControl));
//初始化LinearLayout，加入指示器
initLinearLayout(viewPager, size, llIndicator);
initLinearLayout(viewPager, listView.size(), llIndicator);
}

/**
* 设置指示器，设置ViewPager滑动事件监听
* @param viewPager --ViewPager
* @param pageSize --View的页数
*
* @param viewPager --ViewPager
* @param pageSize --View的页数
* @param linearLayout --LinearLayout
*/
private void initLinearLayout(ViewPager viewPager, int pageSize, LinearLayout linearLayout) {
Expand All @@ -96,8 +80,8 @@ private void initLinearLayout(ViewPager viewPager, int pageSize, LinearLayout li
image.setImageResource(RadioUnselected);
}
//设置宽高
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
LayoutParams params = new LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
params.setMargins(distance, 0, distance, 0);
//将点添加到LinearLayout中
linearLayout.addView(image, params);
Expand All @@ -106,9 +90,13 @@ private void initLinearLayout(ViewPager viewPager, int pageSize, LinearLayout li
//ViewPager的滑动事件
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrollStateChanged(int arg0) {}
public void onPageScrollStateChanged(int arg0) {
}

@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {}
public void onPageScrolled(int arg0, float arg1, int arg2) {
}

@Override
public void onPageSelected(int arg0) {
//arg0当前ViewPager
Expand All @@ -126,39 +114,45 @@ public void onPageSelected(int arg0) {

/**
* 设置圆点距离
* @param distance --距离
*
* @param distance --距离
* @return
*/
public SoreButton setDistance(int distance){
public SoreButton setDistance(int distance) {
this.distance = distance;
return this;
}

/**
* 设置指示器图片
* @param radioSelect --选中图片
* @param radioUnselected --未选中图片
*
* @param radioSelect --选中图片
* @param radioUnselected --未选中图片
* @return
*/
public SoreButton setIndicator(int radioSelect,int radioUnselected){
public SoreButton setIndicator(int radioSelect, int radioUnselected) {
//选中图片
RadioSelect = radioSelect;
//未选中图片
RadioUnselected = radioUnselected;
return this;
}

/**
* 设置view
* @param listView --view
*
* @param listView --view
* @return
*/
public SoreButton setView(List<Integer> listView){
public SoreButton setView(List<Integer> listView) {
this.listView = listView;
return this;
}

/**
* 设置初始化
*/
public SoreButton init(){
public SoreButton init() {
initViewPager();
return this;
}
Expand Down
76 changes: 48 additions & 28 deletions FJMtSortButtonLib/src/main/java/fj/mtsortbutton/lib/adapter/ViewPagerAdapter.java
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@@ -1,38 +1,58 @@
package fj.mtsortbutton.lib.adapter;

import android.support.annotation.NonNull;
import android.support.v4.view.PagerAdapter;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import fj.mtsortbutton.lib.Interface.ViewControl;

public class ViewPagerAdapter extends PagerAdapter {

private List<View> views = null;

public ViewPagerAdapter(List<View> views) {
this.views = views;
}

@Override
public int getCount() {
return views.size() > 0 ? views.size() : 0;
}

@Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}

@Override
public Object instantiateItem(ViewGroup viewGroup, int i) {
viewGroup.addView(views.get(i));
return views.get(i);
}

@Override
public void destroyItem(ViewGroup viewGroup, int i, Object object) {
viewGroup.removeView(views.get(i));
}


private List<Integer> layoutArray = null;
private Map<Integer, View> viewMap = null;
//接口
private ViewControl viewControl;

public ViewPagerAdapter(@NonNull List<Integer> layoutArray, ViewControl viewControl) {
this.layoutArray = layoutArray;
this.viewControl = viewControl;

viewMap = new HashMap<>();
}

@Override
public int getCount() {
return layoutArray.size();
}

@Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}

@Override
public Object instantiateItem(ViewGroup viewGroup, int i) {
View view = viewMap.get(i);
if (view == null) {
view = LayoutInflater.from(viewGroup.getContext()).inflate(layoutArray.get(i), null);
if (viewControl != null) {
viewControl.setView(view, i);
}
viewMap.put(i, view);
}
viewGroup.addView(view, i);
return view;
}

@Override
public void destroyItem(ViewGroup viewGroup, int i, Object object) {
viewGroup.removeView(viewMap.get(i));
}

}