效果图
1.fragment页面
package com.example.mouth_lianxi01.ui.fragment;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
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 android.widget.ImageButton;
import com.andy.library.ChannelActivity;
import com.andy.library.ChannelBean;
import com.example.mouth_lianxi01.R;
import com.example.mouth_lianxi01.db.SqliteDao;
import com.example.mouth_lianxi01.ui.adaper.FilmAdaper;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import java.util.ArrayList;
import java.util.List;
import static com.andy.library.ChannelActivity.REQUEST_CODE;
import static com.andy.library.ChannelActivity.RESULT_CODE;
import static com.andy.library.ChannelActivity.RESULT_JSON_KEY;
public class FilmFragment extends Fragment {
private ImageButton imageButton;
private TabLayout tabLayout;
private ViewPager viewPager;
private List<ChannelBean> select;
private List<ChannelBean> datas;
private FilmAdaper adaper;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.film_fragment,container,false);
}
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
//SqliteDao sqliteDao = new SqliteDao(getActivity());
//获取资源id
imageButton = view.findViewById(R.id.add_image);
tabLayout = view.findViewById(R.id.film_tab);
viewPager = view.findViewById(R.id.film_pager);
//创建适配器
adaper = new FilmAdaper(getChildFragmentManager());
viewPager.setAdapter(adaper);
tabLayout.setupWithViewPager(viewPager);
initData();
}
private void initData() {
datas = new ArrayList<>();
datas.add(new ChannelBean("体育",false));
datas.add(new ChannelBean("彩票",false));
datas.add(new ChannelBean("推荐",false));
datas.add(new ChannelBean("宠物",false));
datas.add(new ChannelBean("直播",false));
datas.add(new ChannelBean("房产",false));
//数据库添加的方法
SqliteDao.getIntance(getActivity()).addAll(datas);
//数据库查询的方法
select = SqliteDao.getIntance(getActivity()).select();
adaper.setmData(getSelectResult(select));
//加号点击
imageButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Gson gson = new Gson();
//将查询出来的数据转换为json串
String toJson = gson.toJson(select);
Intent intent = new Intent(getActivity(),ChannelActivity.class);
intent.putExtra(RESULT_JSON_KEY,toJson);
startActivityForResult(intent,REQUEST_CODE);
}
});
}
//将频道中为true的栏目绑定到TabLayout
public List<ChannelBean> getSelectResult(List<ChannelBean> datas){
//创建新的集合将频道为true的数据存入集合中
List<ChannelBean> result = new ArrayList<>();
//遍历原来的集合
for(ChannelBean bean:datas){
//将为true的频道数据存入新的集合中
if(bean.isSelect()){
result.add(bean);
}
}
return result;
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == REQUEST_CODE && resultCode ==RESULT_CODE){
String json = data.getStringExtra("json");
select = new Gson().fromJson(json,new TypeToken<ArrayList<ChannelBean>>(){}.getType());
adaper.setmData(getSelectResult(select));
return;
}
}
}
2.布局页
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<ImageButton
android:id="@+id/add_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="@id/film_tab"
app:layout_constraintBottom_toBottomOf="@id/film_tab"
android:src="@drawable/ic_action_name"
/>
<android.support.design.widget.TabLayout
android:id="@+id/film_tab"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toLeftOf="@id/add_image"
app:layout_constraintTop_toTopOf="parent"
app:tabMode="scrollable"
/>
<android.support.v4.view.ViewPager
android:id="@+id/film_pager"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toBottomOf="@id/film_tab"
/>
</android.support.constraint.ConstraintLayout>
3.适配器页
package com.example.mouth_lianxi01.ui.adaper;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import com.andy.library.ChannelBean;
import com.example.mouth_lianxi01.ui.fragment.HotFragment;
import com.example.mouth_lianxi01.ui.fragment.JijiangFragment;
import com.example.mouth_lianxi01.ui.fragment.LestFragment;
import com.example.mouth_lianxi01.ui.fragment.ZhengzaiFragment;
import java.util.ArrayList;
import java.util.List;
public class FilmAdaper extends FragmentPagerAdapter {
private List<ChannelBean> mData;
public FilmAdaper(FragmentManager fm) {
super(fm);
mData = new ArrayList<>();
}
public void setmData(List<ChannelBean> mData) {
this.mData = mData;
notifyDataSetChanged();
}
@Override
public Fragment getItem(int i) {
switch (i){
case 0:
return new HotFragment();
case 1:
return new ZhengzaiFragment();
case 2:
return new JijiangFragment();
default:
return new LestFragment();
}
}
@Nullable
@Override
public CharSequence getPageTitle(int position) {
return mData.get(position).getName();
}
@Override
public int getCount() {
return mData.size();
}
}
4.数据库建表页 出始化添加一些数据
package com.example.mouth_lianxi01.db;
import android.content.ContentValues;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class SqliteHelper extends SQLiteOpenHelper {
public SqliteHelper(Context context) {
super(context, "Channel.db", null, 1);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("create table channels(id integer primary key autoincrement," +
"name text," +
"isSelect boolean)");
ContentValues values = new ContentValues();
values.put("name","热门影片");
values.put("isSelect",true);
db.insert("channels",null,values);
values.put("name","正在上映");
values.put("isSelect",true);
db.insert("channels",null,values);
values.put("name","即将上映");
values.put("isSelect",true);
db.insert("channels",null,values);
values.put("name","娱乐");
values.put("isSelect",false);
db.insert("channels",null,values);
values.put("name","财经");
values.put("isSelect",false);
db.insert("channels",null,values);
values.put("name","特卖");
values.put("isSelect",false);
db.insert("channels",null,values);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
}
5.数据库DAO页面
package com.example.mouth_lianxi01.db;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import com.andy.library.ChannelBean;
import java.util.ArrayList;
import java.util.List;
public class SqliteDao {
private static SqliteDao intance;
private final SqliteHelper sqliteHelper;
private final SQLiteDatabase sb;
public SqliteDao(Context context) {
sqliteHelper = new SqliteHelper(context);
sb = sqliteHelper.getWritableDatabase();
}
public static SqliteDao getIntance(Context context) {
if(intance==null){
intance = new SqliteDao(context);
}
return intance;
}
//查询
public List<ChannelBean> select(){
List<ChannelBean> list = new ArrayList<>();
Cursor channels = sb.query("channels", null, null, null, null,
null, null, null);
if(channels!=null){
while (channels.moveToNext()){
String name = channels.getString(channels.getColumnIndex("name"));
boolean isSelect = channels.getInt(channels.getColumnIndex("isSelect")) == 1 ? true:false;
ChannelBean bean = new ChannelBean(name,isSelect);
list.add(bean);
}
channels.close();
}
return list;
}
//添加
public void add(ChannelBean bean){
ContentValues values = new ContentValues();
values.put("name",bean.getName());
values.put("isSelect",bean.isSelect());
sb.insert("channels",null,values);
}
public void addAll(List<ChannelBean> datas){
try {
sb.beginTransaction();
for (ChannelBean bean:datas){
add(bean);
}
sb.setTransactionSuccessful();
}finally {
sb.endTransaction();
}
}
}