仿美团、京东、饿了么点击左边列表 右边切换布局UI
2017-05-22 15:28
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实现思路:一个activity中添加2个fragment,左边的frgament继承自ListFragment,右边的frgament只是做布局UI上的改变直接继承自Fragment,当点击左边列表的某一项item右边的fragment显示对应的信息
MainActivity中布局文件xml中主要是放置两个FrameLayout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
tools:context="com.example.wuke02.listfragmentdemo.MainActivity">
<FrameLayout
android:id="@+id/left_fragment"
android:layout_width="80dp"
android:layout_height="match_parent"
android:background="@color/green">
</FrameLayout>
<FrameLayout
android:id="@+id/right_fragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:background="@color/blue"></FrameLayout>
</LinearLayout>
分别是给fragment分配显示空间大小。
MainActivity中需处理的逻辑是先添加左边的fragment:
左边的列表Fragment继承自ListFragment,创建一个列表要显示数据的数据源array绑定适配器,重写onListItemClick监听方法
定义一个接口,onClickCallBack监听单行item的点击事件,主要实现代码:
public LeftFragment extends ListFragment{
}
MainActivity实现OnItemClickCallBack接口,重写抽象方法onClickCallBack();在此方法中替换右边fragment,并将点击某一项item的position传值到右边的fragment,主要代码:
右边的fragment通过SetArguments和getArguments获知左边列表的那一项被点击了,做出对应的事件处理
右边的fragment处理代码:
public class RightFragment extends Fragment {
private View rightView;
private ListView listView;
private List<String> mList = new ArrayList<>();
private ContentResolver contentResolver;
public RightFragment newInstance(int position){
RightFragment f = new RightFragment();
Bundle bundle = new Bundle();
bundle.putInt("position",position);
f.setArguments(bundle);
return f;
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
rightView = inflater.inflate(R.layout.right_fragment,null);
return rightView;
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
listView = ((ListView) rightView.findViewById(R.id.right_listView));
contentResolver = getActivity().getContentResolver();
Bundle bundle = getArguments();
if (bundle != null){
int position = bundle.getInt("position");
initLayout(position);
}
}
private void initData(int flag){
switch (flag){
case 1:
if (mList != null) mList.clear();
for (int i=0;i<20;i++){
mList.add("11111111111111");
}
break;
case 2:
if (mList != null) mList.clear();
for (int i=0;i<20;i++){
mList.add("测试测试测试");
}
break;
case 3:
if (mList != null) mList.clear();
for (int i=0;i<20;i++){
mList.add("最后一项了");
}
break;
}
}
private void initLayout(int position) {
switch (position){
case 0:
new MyAsyncTask().execute();
break;
case 1:
initData(1);
ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(getActivity(),android.R.layout.simple_list_item_1,mList);
listView.setAdapter(adapter1);
break;
case 2:
initData(2);
ArrayAdapter<String> adapter2 = new ArrayAdapter<String>(getActivity(),android.R.layout.simple_list_item_1,mList);
listView.setAdapter(adapter2);
break;
case 3:
initData(3);
ArrayAdapter<String> adapter3 = new ArrayAdapter<String>(getActivity(),android.R.layout.simple_list_item_1,mList);
listView.setAdapter(adapter3);
break;
default:
break;
}
}
}
在此实现点击左边列表,右边切换不同的布局UI,此demo只是简单实现思路,右边是fragment所以可以实现多种复杂布局复杂,需要源码可以留言邮箱
MainActivity中布局文件xml中主要是放置两个FrameLayout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
tools:context="com.example.wuke02.listfragmentdemo.MainActivity">
<FrameLayout
android:id="@+id/left_fragment"
android:layout_width="80dp"
android:layout_height="match_parent"
android:background="@color/green">
</FrameLayout>
<FrameLayout
android:id="@+id/right_fragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:background="@color/blue"></FrameLayout>
</LinearLayout>
分别是给fragment分配显示空间大小。
MainActivity中需处理的逻辑是先添加左边的fragment:
FragmentTransaction ft = getSupportFragmentManager().beginTransaction(); ft.add(R.id.left_fragment,new LeftListFragment()); ft.commit();
左边的列表Fragment继承自ListFragment,创建一个列表要显示数据的数据源array绑定适配器,重写onListItemClick监听方法
定义一个接口,onClickCallBack监听单行item的点击事件,主要实现代码:
public LeftFragment extends ListFragment{
private String[] array = new String[]{"音乐","视频","联系人","短信"}; public interface OnItemClickCallBack{ void onClickCallBack(int position); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { return super.onCreateView(inflater, container, savedInstanceState); } @Override public void onActivityCreated(@Nullable Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(),android.R.layout.simple_list_item_1, array); setListAdapter(adapter); } @Override public void onListItemClick(ListView l, View v, int position, long id) { super.onListItemClick(l, v, position, id); OnItemClickCallBack callBack = (OnItemClickCallBack) getActivity(); callBack.onClickCallBack(position); }
}
MainActivity实现OnItemClickCallBack接口,重写抽象方法onClickCallBack();在此方法中替换右边fragment,并将点击某一项item的position传值到右边的fragment,主要代码:
@Override public void onClickCallBack(int position) { FragmentTransaction ft = getSupportFragmentManager().beginTransaction(); ft.replace(R.id.right_fragment,new RightFragment().newInstance(position)); ft.commit(); }
右边的fragment通过SetArguments和getArguments获知左边列表的那一项被点击了,做出对应的事件处理
右边的fragment处理代码:
public class RightFragment extends Fragment {
private View rightView;
private ListView listView;
private List<String> mList = new ArrayList<>();
private ContentResolver contentResolver;
public RightFragment newInstance(int position){
RightFragment f = new RightFragment();
Bundle bundle = new Bundle();
bundle.putInt("position",position);
f.setArguments(bundle);
return f;
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
rightView = inflater.inflate(R.layout.right_fragment,null);
return rightView;
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
listView = ((ListView) rightView.findViewById(R.id.right_listView));
contentResolver = getActivity().getContentResolver();
Bundle bundle = getArguments();
if (bundle != null){
int position = bundle.getInt("position");
initLayout(position);
}
}
private void initData(int flag){
switch (flag){
case 1:
if (mList != null) mList.clear();
for (int i=0;i<20;i++){
mList.add("11111111111111");
}
break;
case 2:
if (mList != null) mList.clear();
for (int i=0;i<20;i++){
mList.add("测试测试测试");
}
break;
case 3:
if (mList != null) mList.clear();
for (int i=0;i<20;i++){
mList.add("最后一项了");
}
break;
}
}
private void initLayout(int position) {
switch (position){
case 0:
new MyAsyncTask().execute();
break;
case 1:
initData(1);
ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(getActivity(),android.R.layout.simple_list_item_1,mList);
listView.setAdapter(adapter1);
break;
case 2:
initData(2);
ArrayAdapter<String> adapter2 = new ArrayAdapter<String>(getActivity(),android.R.layout.simple_list_item_1,mList);
listView.setAdapter(adapter2);
break;
case 3:
initData(3);
ArrayAdapter<String> adapter3 = new ArrayAdapter<String>(getActivity(),android.R.layout.simple_list_item_1,mList);
listView.setAdapter(adapter3);
break;
default:
break;
}
}
}
在此实现点击左边列表,右边切换不同的布局UI,此demo只是简单实现思路,右边是fragment所以可以实现多种复杂布局复杂,需要源码可以留言邮箱
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