实现网易新闻框架的搭建
使用drawerlayout，viewpager,tablelayout,fragment来实现网易新闻框架的搭建
一：首先我们来完成activity_main的布局：
注意：我们整个布局的大布局应该设置为drawerlayout
完成布局我们在activity中完成逻辑代码package com.example.dell.wangyishall;
import android.os.Bundle;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;
public class MainActivity extends AppCompatActivity {
private DrawerLayout drawer_layout;
private ActionBarDrawerToggle toggle;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
init_actionBar_Draw();
}
//初始化控件drawerlayout实现侧拉
private void initView() {
drawer_layout = (DrawerLayout) findViewById(R.id.activity_main);
}
/**
* 初始化ActionBar 和 DrawerLayout
*/
private void init_actionBar_Draw() {
//得到actionbar对象
ActionBar actionBar = getSupportActionBar();
//决定左上角的图标是否可以点击
actionBar.setDisplayHomeAsUpEnabled(true);
actionBar.setHomeButtonEnabled(true);
//改变android.R.id.home返回图标。
//Drawer拉出、隐藏，带有android.R.id.home动画效果。
// 监听Drawer拉出、隐藏；
toggle = new ActionBarDrawerToggle(this, drawer_layout, R.string.app_name, R.string.app_name);
//将抽屉指示器的状态与链接的DrawerLayout同步其状态
toggle.syncState();
// ActionBar关联DrawerLayout
drawer_layout.addDrawerListener(toggle);
}
//在点击选项菜单（OptionsMenu：点击menu弹出的菜单）的菜单项时
// 即调用了onMenuItemSelected 也调用了onOptionsItemSelected
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (drawer_layout.isDrawerOpen(GravityCompat.END)) {
drawer_layout.closeDrawer(GravityCompat.END);//关闭抽屉
return super.onOptionsItemSelected(item);
}
return toggle.onOptionsItemSelected(item) | super.onOptionsItemSelected(item);
}
}
完成第一个activity布局之后，因为我们在里面设置了这个左侧了fragment，所以接下来就是完成左侧fragment
里面添加的fragment
那么第一个就是我们的右侧啦，因为在这个小demo里没有填充右侧拉里面的功能或是数据
package com.example.dell.wangyishall;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* A simple {@link Fragment} subclass.
*/
public class RightFragment extends Fragment {
public RightFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_right, container, false);
}
}那么我们现在来实现左侧拉的fragment：那么首先还是我们先完成他的布局：
接下来就是左侧拉里面的逻辑代码：在这里面的呢我们一个在左侧拉的fragment里添加了五个点击事件，并且用的
listview来添加；
package com.example.dell.wangyishall;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ListView;
import java.util.ArrayList;
import java.util.List;
/**
* A simple {@link Fragment} subclass.
*/
public class LeftFragment extends Fragment {
private MainFragment main_fragment;
private SecondFragment second_fragment;
private ThirdFragment three_fragment;
private fourthFragment four_fragment;
private FifthFragment five_fragment;
public LeftFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View inflate = inflater.inflate(R.layout.fragment_left, container, false);
ListView list_view = inflate.findViewById(R.id.listview);
List list_str = new ArrayList<>();
for (int i = 1; i < 6; i++) {
list_str.add("第"+i+"个Fragment");
}
list_view.setAdapter(new MyBaseAdapter(getActivity(),list_str));
main_fragment = new MainFragment();
second_fragment = new SecondFragment();
three_fragment = new ThirdFragment();
four_fragment = new fourthFragment();
five_fragment = new FifthFragment();
getActivity().getSupportFragmentManager().beginTransaction().add(R.id.linear, main_fragment).commit();
getActivity().getSupportFragmentManager().beginTransaction().add(R.id.linear, second_fragment).commit();
getActivity().getSupportFragmentManager().beginTransaction().add(R.id.linear, three_fragment).commit();
getActivity().getSupportFragmentManager().beginTransaction().add(R.id.linear, four_fragment).commit();
getActivity().getSupportFragmentManager().beginTransaction().add(R.id.linear, five_fragment).commit();
getActivity().getSupportFragmentManager().beginTransaction().hide(second_fragment).hide(three_fragment).hide(four_fragment).hide(five_fragment).commit();
list_view.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView adapterView, View view, int i, long l) {
switch (i) {
case 0:
getActivity().getSupportFragmentManager().beginTransaction().show(main_fragment).hide(second_fragment).hide(three_fragment).hide(four_fragment).hide(five_fragment).commit();
break;
case 1:
getActivity().getSupportFragmentManager().beginTransaction().show(second_fragment).hide(main_fragment).hide(three_fragment).hide(four_fragment).hide(five_fragment).commit();
break;
case 2:
getActivity().getSupportFragmentManager().beginTransaction().show(three_fragment).hide(main_fragment).hide(second_fragment).hide(four_fragment).hide(five_fragment).commit();
break;
case 3:
getActivity().getSupportFragmentManager().beginTransaction().show(four_fragment).hide(main_fragment).hide(second_fragment).hide(three_fragment).hide(five_fragment).commit();
break;
case 4:
getActivity().getSupportFragmentManager().beginTransaction().show(five_fragment).hide(main_fragment).hide(second_fragment).hide(three_fragment).hide(four_fragment).commit();
break;
default:
break;
}
}
});
return inflate;
} 上面也说到了我们用了这个listview，和fragment，那么接下来我们就是给他优化一下
package com.example.dell.wangyishall;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import java.util.List;
/**
* Created by DELL on 2017/8/31.
*/
public class MyBaseAdapter extends BaseAdapter {
public Context context;
public List list;
public MyBaseAdapter(Context context, List list) {
this.context = context;
this.list = list;
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int i) {
return null;
}
@Override
public long getItemId(int i) {
return 0;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
View inflate = View.inflate(context, R.layout.item, null);
TextView text = inflate.findViewById(R.id.tv_item);
text.setText(list.get(i));
return inflate;
}
}
在这我们实现fragment_main的布局文件
<HorizontalScrollView android:layout_width="match_parent" android:layout_height="wrap_content"> <android.support.design.widget.TabLayout android:id="@+id/tab_layout" android:layout_width="match_parent" android:layout_height="wrap_content">android.support.design.widget.TabLayout> HorizontalScrollView> <android.support.v4.view.ViewPager android:id="@+id/pager" android:layout_width="match_parent" android:layout_height="match_parent">android.support.v4.view.ViewPager>
那么实现完左侧拉里面的fragment之后呢，我们紧接着就去实现左侧拉里面的第一个fragment，因为左侧拉里面的第
一个fragment是我们实现加载数据的页面：
package com.example.dell.wangyishall;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import java.util.ArrayList;
import java.util.List;
/**
* A simple {@link Fragment} subclass.
*/
public class MainFragment extends Fragment {
private View inflate;
private TabLayout tab_layout;
private ViewPager pager;
List list_str = new ArrayList<>();
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
inflate = inflater.inflate(R.layout.fragment_main, container, false);
for (int i = 0; i < 10; i++) {
list_str.add("No."+i);
}
initView();
init_tab_pager();
return inflate;
}
private void initView() {
tab_layout = (TabLayout) inflate.findViewById(R.id.tab_layout);
pager = (ViewPager) inflate.findViewById(R.id.pager);
}
private void init_tab_pager() {
List list_fragment = new ArrayList<>();
for (int i = 0; i < 10; i++) {
PagerFragment fragment = new PagerFragment();
list_fragment.add(fragment);
}
tab_layout.setTabMode(TabLayout.MODE_FIXED);
for (int i = 0; i < 10; i++) {
tab_layout.addTab(tab_layout.newTab().setText(list_str.get(i)));
}
MyPagerAdapter adapter = new MyPagerAdapter(getActivity().getSupportFragmentManager(),list_str,list_fragment);
pager.setOffscreenPageLimit(1);
pager.setAdapter(adapter);
tab_layout.setupWithViewPager(pager);
} 接着创建fragment的适配器：
package com.example.dell.wangyishall;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import java.util.List;
/**
* Created by DELL on 2017/8/31.
*/
public class MyPagerAdapter extends FragmentPagerAdapter {
public List list_str;
public List list_frag;
//接收传过来的值
public MyPagerAdapter(FragmentManager fm, List list_str, List list_frag) {
super(fm);
this.list_str = list_str;
this.list_frag = list_frag;
}
//返回对应位置的Fragment
@Override
public Fragment getItem(int position) {
return list_frag.get(position);
}
@Override
public int getCount() {
return list_frag.size();
}
@Override
public CharSequence getPageTitle(int position) {
return list_str.get(position%list_str.size());
}
} 那么我们的pagerfragment就是我们加载数据所需要的页面：
package com.example.dell.wangyishall;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* A simple {@link Fragment} subclass.
*/
public class PagerFragment extends Fragment {
public PagerFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
//我们在这里面进行添加数据的操作
return inflater.inflate(R.layout.fragment_pager, container, false);
}
}
最后来展示一下我们实现的效果: