标签:
最近需求sama联合美工娘娘又改了界面,整体的界面是华丽了不少,但是大神何必为难弱智儿童的我呢,下面先看看新界面~
很经典的菜单设计,不过毕竟是版本更迭,不适合在原有基础上大修改改,菜单总共分了4个父菜单和若干个子菜单,点击父菜单会隐藏子菜单,其中还要有收起展开动画,这个首先令我想起了expanedlistview。说动手就动手,花了几分钟先写个demo测试以下吧。
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<ExpandableListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/exlistview"
></ExpandableListView>
</RelativeLayout>
这个很简单的布局代码,不必多说了~
然后定义一个实体类,包含父子菜单所必需的内容
public class Bean {
public Bean(String title, List<childBean> childBeans) {
this.title = title;
this.childBeans = childBeans;
}
public Bean() {
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public List<childBean> getChildBeans() {
return childBeans;
}
public void setChildBeans(List<childBean> childBeans) {
this.childBeans = childBeans;
}
private String title;
private List<childBean> childBeans;
public static class childBean{
private String title;
public childBean(String title) {
this.title = title;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
}
}
这几行代码也不必多说,一目了然,如果需要添加其他的 自然也可以自己添加~
最后开始写自定义adapter了,也很简单不是吗?
public class TestAdapter extends BaseExpandableListAdapter {
private List<Bean> groups;
private Context context;
public TestAdapter( Context context, List<Bean> groups){
this.context=context;
this.groups=groups;
}
@Override
public int getGroupCount() {
return groups.size();
}
@Override
public int getChildrenCount(int groupPosition) {
return groups.get(groupPosition).getChildBeans().size();
}
@Override
public Object getGroup(int groupPosition) {
return groups.get(groupPosition);
}
@Override
public Object getChild(int groupPosition, int childPosition) {
return groups.get(groupPosition).getChildBeans().get(childPosition);
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
View view= LayoutInflater.from(context).inflate(R.layout.item_a,null);
TextView tv= (TextView) view.findViewById(R.id.a_text);
tv.setText(groups.get(groupPosition).getTitle());
return view;
}
@Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
View view= LayoutInflater.from(context).inflate(R.layout.item_a,null);
TextView tv= (TextView) view.findViewById(R.id.a_text);
tv.setText(groups.get(groupPosition).getChildBeans().get(childPosition).getTitle());
return view;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return false;
}
}
很简单的代码,毕竟只是demo,大家就将就一下看看,最后在activity里调用一下,我们来看效果吧~
public class MainActivity extends AppCompatActivity {
private ExpandableListView listView;
private List<Bean> mList=new ArrayList<>();
private List<Bean.childBean> childList=new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView= (ExpandableListView) findViewById(R.id.exlistview);
Bean.childBean childBean;
for(int j=0;j<3;j++){
childBean=new Bean.childBean("aaaa"+j);
childList.add(childBean);
}
for(int i=0;i<3;i++){
mList.add(new Bean(i+"",childList));
}
TestAdapter adapter=new TestAdapter(MainActivity.this,mList);
listView.setAdapter(adapter);
listView.setGroupIndicator(null);
}
}
最后 上动图看效果:
太粗糙了,而且没有收起展开的动画,没办法,继续百度吧,然后找到了一个叫animationExpanedListView的东东,但是我感觉比较久远了,上次更新已经2年之前了,有想实验的小伙伴可以去这里---->https://github.com/idunnololz/AnimatedExpandableListView。
怎么办呢,看来只有自己想办法了。首先屡清楚思路,模仿listview的效果可以试试,所以首先写一个自定义的adapter出来~
public abstract class SettingsAdapter<T> {
private Context context;
private List<T> mList;
public SettingsAdapter(Context context, List<T> mList){
this.context=context;
this.mList=mList;
}
public SettingsAdapter(T[] mDatas){
mList=new ArrayList<T>(Arrays.asList(mDatas));
}
public int getCount(){
return mList==null?0:mList.size();
}
public T getItem(int position){
return mList.get(position);
}
public void notifyDataSetChanged(){
onDataChanged.changed();
}
public abstract View getView(SettingView parent, int position);
public interface onDataChanged {
void changed();
}
public void setOnDataChanged(onDataChanged onDataChanged) {
this.onDataChanged = onDataChanged;
}
public onDataChanged onDataChanged;
}
这一段代码很容易理解,跟普通的adapter没有啥不一样的~继续向下我们要实现子菜单的布局,首先我们继承linearlayout,因为菜单毕竟是自上向下的嘛~
public class SettingView extends LinearLayout implements SettingsAdapter.onDataChanged{
private Context context;
private SettingsAdapter adapter;
public SettingView(Context context) {
this(context, null);
}
public SettingView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public SettingView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
this.context=context;
setOrientation(VERTICAL);
}
接下来我们公开一个adapter调用的方法用法调用adapter;
public void setAdapter(SettingsAdapter adapter){
this.adapter=adapter;
changeAdapter();
}
这依然是很简单的代码。我们接下来看changeAdapter里面的内容
private void changeAdapter() {
removeAllViews();
SettingsAdapter settingsAdapter = this.adapter;
for(int i=0;i<settingsAdapter.getCount();i++){
final View layout = settingsAdapter.getView(this, i);
layout.setTag(i);
addView(layout);
layout.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if(onItemClick!=null){
onItemClick.click(v,(Integer) layout.getTag());
}
}
});
}
}
一目了然是不是,如果看不懂没关系,那就多看几遍,如果多看几遍还是看不懂,也没关系,其实我也不懂。
最后我们通过接口回调将接口公布出去,这是我们的接口以及实现的adapter中接口:
public interface OnItemClick {
void click(View v,int i);
}
public void setOnItemClick(OnItemClick onItemClick) {
this.onItemClick = onItemClick;
}
private OnItemClick onItemClick;
@Override
public void changed() {
changeAdapter();
}
最后在xml中的布局就是这样子的:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<!-- <ExpandableListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/exlistview"
></ExpandableListView>-->
<TextView
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="@android:color/holo_red_dark"
android:text="1111111111111111111"
android:textSize="20sp"
android:gravity="center"
android:id="@+id/tv1"
/>
<com.example.mydemo.SettingView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/test_layout"
/>
</LinearLayout>
Textview暂时充当的是父菜单,settingview就是子菜单咯~
tv= (TextView) findViewById(R.id.tv1);
sv= (SettingView) findViewById(R.id.test_layout);
for(int i=0;i<5;i++){
mList.add(i+"");
}
SettingsAdapter adapter=new SettingsAdapter(MainActivity.this,mList) {
@Override
public View getView(SettingView parent, int position) {
View view=getLayoutInflater().inflate(R.layout.item_a,null);
TextView tv= (TextView) view.findViewById(R.id.a_text);
tv.setText(mList.get(position));
return view;
}
};
sv.setAdapter(adapter);
sv.setOnItemClick(new SettingView.OnItemClick() {
@Override
public void click(View v,int i) {
Toast.makeText(MainActivity.this,mList.get(i),Toast.LENGTH_SHORT).show();
}
});
}
最后在activity里敲这些很简单的代码,差不多第一步的自定义布局就算实现了。看效果
布局是写好了,但是暂时还没有任何的点击效果和动画效果,这时候想到了什么呢,属性动画,当当当~不过objectAnimator里并没有对View高度的动画,不过我们知道valueAnimator是可以实现这个的,不多说看代码~
public static ValueAnimator DropAnim(final View view,int start,int end){
ValueAnimator animator=ValueAnimator.ofInt(start,end);
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
int value= (Integer) animation.getAnimatedValue();
ViewGroup.LayoutParams lp = view.getLayoutParams();
lp.height=value;
view.setLayoutParams(lp);
}
});
return animator;
}
首先,我们需要把target的view 和view的起始高度传起来,最后通过动画的listener实现对view高度的动态变化,看到这里是不是有些思路了~~~
public static void animatorOpen(final View view, int height){
view.setVisibility(View.VISIBLE);
AnimatorSet set=new AnimatorSet();
set.setDuration(1000);
ValueAnimator animator = DropAnim(view, 0, height);
ObjectAnimator oa=ObjectAnimator.ofFloat(view, View.ALPHA, 0.0f, 1.0f);
set.playTogether(animator,oa);
set.setDuration(1000);
set.start();
}
public static void animatorClose(final View view, int height){
AnimatorSet set=new AnimatorSet();
set.setDuration(1000);
ValueAnimator animator = DropAnim(view, height,0);
ObjectAnimator oa=ObjectAnimator.ofFloat(view,View.ALPHA,1.0f,0.0f);
set.playTogether(animator,oa);
set.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
view.setVisibility(View.GONE);
}
});
set.start();
}
这是动画开关的两个方法,方法大致相同,我们不仅实现了高度的变化,而且加入了透明度的变化,当然你也可以加入一些其他的动画,这里就不多做介绍了。
最后在在点击事件中通过判断子菜单的vissable来判断动画的开合,是不是很简单呢?最后的一个难点是获取view的高度,我们并没有在自定义的布局里直接获取到他的高度,当然你也可以在自定义view的时候直接通过 getMeasuredHeight() 的方法获得出来,当然也可以通过post方法进行获取
sv.post(new Runnable() {
@Override
public void run() {
height=sv.getHeight();
}
});
tv.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(sv.getVisibility()==View.VISIBLE){
AnimUtils.animatorClose(sv,height);
}else{
AnimUtils.animatorOpen(sv,height);
}
}
});
最后大功告成~来看一下动画效果吧~
是不是很炫呢?最后有一个小问题,就是如何在fragment中获取控件的高度呢,起初我也是傻傻的post方法,然并卵的是然并卵啊~最后还是找到了答案~通过
ViewTreeObserver来获取,然后在点击或者初始化完成之后进行移除监听,不然他会一直监听控件的高度,切记,移除这个监听,必须放在动画之前,否则会出现意想不到的彩蛋呢~
好了,第一篇博客大功告成,我要去水群了~~~~大家再见·~~~~~
标签:
原文地址:http://blog.csdn.net/aa4100123/article/details/51321240