快速实现网易新闻框架搭建
今天给大家带来的是网易新闻框架的搭建
主要用到的知识点还是drawerlayout，viewpager，tablayout，fragment。。。。
直接进入主题，上代码，快速实现：
一：进入主页面的一个activity，我们在这里面设置一个左右侧拉
1.activity_main 布局：
注意：外面的大布局换成drawerlayout：
2.实现MainActivity的逻辑代码：
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.os.Bundle;
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);
}二：通过上面的代码我们已经创建出来左右侧拉的布局，现在就是去实现左右侧拉的fragment
1.我们先实现一个右fragment：
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* Created by Administrator on 2017/8/31 0031.
*/
public class RightFragment extends Fragment{
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_right, container, false); }
2.实现左侧拉的fragment，因为左侧拉现在有我们的布局，需要实现fragment 的切换替换和隐藏等，所以我们先来
实现他的XML
下面实现左侧拉fragment的逻辑代码 :
注意：代码里面的fragment你们只需要创建出来就好，如果自己 想要实现什么功能就添加代码就OK了
import android.os.Bundle;
import android.support.annotation.Nullable;
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;
/**
* Created by Administrator on 2017/8/31 0031.
*/
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;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
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;
} 3.上面我们也说到了我们用到了listview，那么我们就要实现他的优化：
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 Administrator on 2017/8/31 0031.
*/
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;
} 三：因为我们做的是网易新闻客户端的搭建，所以我需要在刚刚创建的左侧拉的fragment里面创建的第一个fragment
这就是fragment套fragment，所以我现在要在第一个创建我的逻辑代码，那么接下来就要用到我们的drawerlayout
tablayout的知识点：
1.先看XML布局：我们的tablayout是需要添加依赖的
注意：我们的依赖是：
compile 'com.android.support:design:26.0.0-alpha1'
2.看MainFragment的代码：
import android.os.Bundle;
import android.support.annotation.Nullable;
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;
/**
* Created by Administrator on 2017/8/31 0031.
*/
public class MainFragment extends Fragment{
private View inflate;
private TabLayout tab_layout;
private ViewPager pager;
List list_str = new ArrayList<>();
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
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);
} 3.我们在里面创建了用到了fragment的集合，所以我们应该给他优化一下，用到fragmentpageradapter
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import java.util.List;
/**
* Created by Administrator on 2017/8/31 0031.
*/
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());
} 4.那么我们最后在实现一下我们里面创建的pagerfragment，那么我并没有实现具体的逻辑代码，我们做的是新闻客户端，那么我们就可以在这里面实现他的加载数据的一些操作：
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* Created by Administrator on 2017/8/31 0031.
*/
public class PagerFragment extends Fragment{
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
//我们在这里面进行添加数据的操作
return inflater.inflate(R.layout.fragment_pager, container, false);
}那么做完这些呢，我们的一个基本框架就搭建完成了，希望老铁们多多支持！！！