最厉害的代码
1.侧滑和切换
package com.example.administrator.mnykt;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.RadioGroup;
import com.example.administrator.fragment.Frag1;
import com.example.administrator.fragment.Frag2;
import com.example.administrator.fragment.Frag3;
import com.example.administrator.fragment.Frag4;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
private Frag1 frag1;
private Frag2 frag2;
private Frag3 frag3;
private Frag4 frag4;
private ArrayList list;
private RadioGroup radio_group;
private FrameLayout fram_layout;
private FragmentManager manager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final DrawerLayout d1 = (DrawerLayout) findViewById(R.id.d1);
ImageView iv1 = (ImageView) findViewById(R.id.iv1);
ImageView iv2 = (ImageView) findViewById(R.id.iv2);
fram_layout = (FrameLayout) findViewById(R.id.fram_layout);
radio_group = (RadioGroup) findViewById(R.id.radio_group);
iv1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
d1.openDrawer(Gravity.LEFT);
}
});
iv2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
d1.closeDrawer(Gravity.LEFT);
}
});
final Frag1 frag1 = new Frag1();
final Frag2 frag2 = new Frag2();
final Frag3 frag3 = new Frag3();
final Frag4 frag4 = new Frag4();
manager = getSupportFragmentManager();
manager.beginTransaction().replace(R.id.fram_layout,frag1).commit();
radio_group.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
FragmentTransaction transaction = manager.beginTransaction();
switch (checkedId){
case R.id.rb1:
transaction.replace(R.id.fram_layout,frag1);
break;
case R.id.rb2:
transaction.replace(R.id.fram_layout,frag2);
break;
case R.id.rb3:
transaction.replace(R.id.fram_layout,frag3);
break;
case R.id.rb4:
transaction.replace(R.id.fram_layout,frag4);
break;
}
transaction.commit();
}
});
}
}
2.布局
3.fragment页面
package com.example.administrator.fragment;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
import android.widget.Toast;
import com.example.administrator.adapter.Adapter;
import com.example.administrator.bean.NewsBean;
import com.example.administrator.helper.NewsDao;
import com.example.administrator.helper.User;
import com.example.administrator.mnykt.R;
import com.example.administrator.utils.HttpUtils;
import com.example.administrator.utils.NetUtils;
import com.google.gson.Gson;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshListView;
import java.util.ArrayList;
import java.util.HashSet;
public class Frag1 extends Fragment implements HttpUtils.Netcallback {
private PullToRefreshListView pulltorefsh;
private String url = "http://ttpc.dftoutiao.com/jsonpc/refresh?type=";
//private String bannerUrl = "http://www.xieast.com/api/banner.php";
private int type = 5010;
private ArrayList list;
private Adapter adapter;
private NewsDao newsDao;
private HttpUtils httpUtils;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = View.inflate(getContext(), R.layout.frag1, null);
pulltorefsh = view.findViewById(R.id.pulltorefsh);
pulltorefsh.setMode(PullToRefreshBase.Mode.BOTH);
pulltorefsh.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2() {
@Override
public void onPullDownToRefresh(PullToRefreshBase refreshView) {
type=5010;
pulltorefsh.postDelayed(new Runnable() {
@Override
public void run() {
pulltorefsh.onRefreshComplete();
}
},2000);
getData();
}
@Override
public void onPullUpToRefresh(PullToRefreshBase refreshView) {
type++;
pulltorefsh.postDelayed(new Runnable() {
@Override
public void run() {
pulltorefsh.onRefreshComplete();
}
},2000);
getData();
}
});
//创建一个空的结合
list = new ArrayList<>();
//创建适配器
adapter = new Adapter(getActivity(), list);
pulltorefsh.setAdapter(adapter);
//创建dao层
newsDao = new NewsDao(getActivity());
httpUtils = HttpUtils.getInstance();
getData();
//网络工具类
return view;
}
private void getData() {
User user = newsDao.query(url + type);
if (user!=null){
parserjson(user.json);
}else{
if (NetUtils.iswlzj(getActivity())){
httpUtils.getwangluo(url+type,this);
}else{
Toast.makeText(getActivity(), "请连接网络", Toast.LENGTH_SHORT).show();
}
}
}
private void parserjson(String json) {
Gson gson = new Gson();
NewsBean newsBean = gson.fromJson(json, NewsBean.class);
if (type==5010){
list.clear();
}
list.addAll(newsBean.getData());
HashSet hashSet = new HashSet(list);
list.clear();
list.addAll(hashSet);
adapter.notifyDataSetChanged();
}
@Override
public void onSuccess(String result) {
Log.i("aaa","执行了success");
//截取字段
String json = result.replace("null(", "").replace(")", "");
//把数据添加到数据库
newsDao.insert(new User((url+type),json));
Gson gson = new Gson();
NewsBean newsBean = gson.fromJson(json, NewsBean.class);
list.addAll(newsBean.getData());
}
@Override
public void onError(String s) {
Log.i("aaa",s);
}
}
4.适配器
package com.example.administrator.adapter;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import com.example.administrator.bean.NewsBean;
import com.example.administrator.mnykt.R;
import com.nostra13.universalimageloader.core.ImageLoader;
import java.util.ArrayList;
public class Adapter extends BaseAdapter {
private Context context;
private ArrayList list;
public Adapter(Context context, ArrayList list) {
this.context = context;
this.list = list;
}
private final int TYPE_0=0;
private final int TYPE_1=1;
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
try {
return list.get(position);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public int getViewTypeCount() {
return 2;
}
@Override
public int getItemViewType(int position) {
int p=position%2;
if (p==0){
return TYPE_0;
}else{
return TYPE_1;
}
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
int type = getItemViewType(position);
if (type==0){
ViewHolder holder=null;
if (convertView==null){
convertView = View.inflate(context, R.layout.item1, null);
holder = new ViewHolder();
holder.text_view = (TextView)convertView.findViewById(R.id.text_view);
holder.iv3 = (ImageView)convertView.findViewById(R.id.iv3);
convertView.setTag(holder);
}else{
holder = (ViewHolder) convertView.getTag();
}
holder.text_view.setText(list.get(position).getBrief());
ImageLoader.getInstance().displayImage(list.get(position).getMiniimg().get(0).getSrc(),holder.iv3);
return convertView;
}else if (type==1){
ViewHolder holder=null;
if (convertView==null){
convertView = View.inflate(context, R.layout.item2, null);
holder = new ViewHolder();
holder.text_view1 = (TextView)convertView.findViewById(R.id.text_view1);
holder.iv4 = (ImageView)convertView.findViewById(R.id.iv4);
holder.iv5 = (ImageView)convertView.findViewById(R.id.iv5);
holder.iv6 = (ImageView)convertView.findViewById(R.id.iv6);
convertView.setTag(holder);
}else{
holder = (ViewHolder) convertView.getTag();
}
holder.text_view1.setText(list.get(position).getBrief());
ImageLoader.getInstance().displayImage(list.get(position).getMiniimg().get(0).getSrc(),holder.iv4);
ImageLoader.getInstance().displayImage(list.get(position).getMiniimg().get(0).getSrc(),holder.iv5);
ImageLoader.getInstance().displayImage(list.get(position).getMiniimg().get(0).getSrc(),holder.iv6);
return convertView;
}
return null;
}
public class ViewHolder{
public TextView text_view;
public ImageView iv3;
public TextView text_view1;
public ImageView iv4;
public ImageView iv5;
public ImageView iv6;
}
}