Android 使用SQLite游标以片段形式输出listview中的表内容

我有

MyDBHandler

和

getAllDetails

方法，该方法使用游标查询数据库并返回列表

我现在不知道该怎么做，就是如何将这个列表输出到另一个片段中的

listview

。我被告知要创建两个XML布局和一个自定义适配器，但我不知道如何做到这一点

MyDBHandler类

package com.astuetz.viewpager.extensions.sample;

import android.content.ContentValues;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.database.Cursor;
import android.content.Context;
import android.content.ContentValues;

import java.util.ArrayList;
import java.util.List;

public class MyDBHandler extends SQLiteOpenHelper {

private static final int DATABASE_VERSION = 1;
private static final String DATABASE_NAME = "detailsDB.db";
public static final String TABLE_DETAILS = "details";
public static final String COLUMN_ID = "_id";
public static final String COLUMN_FIRSTNAME = "firstname";
public static final String COLUMN_SURNAME = "surname";
public static final String COLUMN_PHONE = "phone";
public static final String COLUMN_EMAIL = "email";
public static final String COLUMN_ADDRESS1 = "address1";
public static final String COLUMN_ADDRESS2 = "address2";

public static final String TABLE_KIN_DETAILS = "kindetails";
public static final String COLUMN_KIN_ID = "_id";
public static final String COLUMN_KIN_YOUREMAIL = "youremailkin";
public static final String COLUMN_KIN_FIRSTNAME = "firstnamekin";
public static final String COLUMN_KIN_SURNAME = "surnamekin";
public static final String COLUMN_KIN_PHONE = "phonekin";
public static final String COLUMN_KIN_EMAIL = "emailkin";
public static final String COLUMN_KIN_ADDRESS1 = "address1kin";
public static final String COLUMN_KIN_ADDRESS2 = "address2kin";

// Pass database information along to superclass
public MyDBHandler(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) {
    super(context, DATABASE_NAME, factory, DATABASE_VERSION);
}

@Override
public void onCreate(SQLiteDatabase db) {
    String query = " CREATE TABLE " + TABLE_DETAILS + "("
            + COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, "
            + COLUMN_FIRSTNAME + " TEXT, "
            + COLUMN_SURNAME + " TEXT, "
            + COLUMN_PHONE + " TEXT, "
            + COLUMN_EMAIL + " TEXT, "
            + COLUMN_ADDRESS1 + " TEXT, "
            + COLUMN_ADDRESS2 + " TEXT "
            + ");";

    String query2 = " CREATE TABLE " + TABLE_KIN_DETAILS + "("
            + COLUMN_KIN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, "
            + COLUMN_KIN_YOUREMAIL + " TEXT, "
            + COLUMN_KIN_FIRSTNAME + " TEXT, "
            + COLUMN_KIN_SURNAME + " TEXT, "
            + COLUMN_KIN_PHONE + " TEXT, "
            + COLUMN_KIN_EMAIL + " TEXT, "
            + COLUMN_KIN_ADDRESS1 + " TEXT, "
            + COLUMN_KIN_ADDRESS2 + " TEXT "
            + ");";
    db.execSQL(query);
    db.execSQL(query2);
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    db.execSQL(" DROP TABLE IF EXISTS " + TABLE_DETAILS);
    db.execSQL(" DROP TABLE IF EXISTS " + TABLE_KIN_DETAILS);
    onCreate(db);
}

//Add a new row to the database
public void addDetails(Details details) {
    ContentValues values = new ContentValues();
    values.put(COLUMN_FIRSTNAME, details.getFirstname());
    values.put(COLUMN_SURNAME, details.getSurname());
    values.put(COLUMN_PHONE, details.getPhone());
    values.put(COLUMN_EMAIL, details.getEmail());
    values.put(COLUMN_ADDRESS1, details.getAddress1());
    values.put(COLUMN_ADDRESS2, details.getAddress2());
    SQLiteDatabase db = getWritableDatabase();
    db.insert(TABLE_DETAILS, null, values);
    db.close();
}

public void addKinDetails(KinDetails kinDetails){
    ContentValues values = new ContentValues();
    values.put(COLUMN_KIN_YOUREMAIL, kinDetails.getyourEmailkin());
    values.put(COLUMN_KIN_FIRSTNAME, kinDetails.getFirstnamekin());
    values.put(COLUMN_KIN_SURNAME, kinDetails.getSurnamekin());
    values.put(COLUMN_KIN_PHONE, kinDetails.getPhonekin());
    values.put(COLUMN_KIN_EMAIL, kinDetails.getEmailkin());
    values.put(COLUMN_KIN_ADDRESS1, kinDetails.getAddress1kin());
    values.put(COLUMN_KIN_ADDRESS2, kinDetails.getAddress2kin());
    SQLiteDatabase db = getWritableDatabase();
    db.insert(TABLE_KIN_DETAILS, null, values);
    db.close();
}



public List<Details> getAllDetails(){

    //create a new list in which we put all persons
    List<Details>detailsList = new ArrayList<>();

    SQLiteDatabase db = getWritableDatabase();
    String query = "SELECT * FROM " + TABLE_DETAILS;

    //Cursor points to a location in your results
    Cursor c = db.rawQuery(query, null);
    //Move to the first row in your results

    if (c != null) {

        c.moveToFirst();

        //Position after the last row means the end of the results
        while (!c.isAfterLast()) {

            //create new details object
            Details details = new Details();

            //Here use static declared on top of the class..don't use "" for the table column
            details.set_id(c.getColumnIndex(COLUMN_ID));
            details.setFirstname(c.getString(c.getColumnIndex(COLUMN_FIRSTNAME)));
            details.setSurname(c.getString(c.getColumnIndex(COLUMN_SURNAME)));
            details.setPhone(c.getString(c.getColumnIndex(COLUMN_PHONE)));
            details.setEmail(c.getString(c.getColumnIndex(COLUMN_EMAIL)));
            details.setAddress1(c.getString(c.getColumnIndex(COLUMN_ADDRESS1)));
            details.setAddress2(c.getString(c.getColumnIndex(COLUMN_ADDRESS2)));

            detailsList.add(details);


            c.moveToNext();
        }

        c.close();
    }

    db.close();

    //return our list of persons
    return detailsList;

}
}

package com.astuetz.viewpager.extensions.sample；
导入android.content.ContentValues；
导入android.content.Context；
导入android.database.sqlite.SQLiteDatabase；
导入android.database.sqlite.SQLiteOpenHelper；
导入android.database.Cursor；
导入android.content.Context；
导入android.content.ContentValues；
导入java.util.ArrayList；
导入java.util.List；
公共类MyDBHandler扩展了SQLiteOpenHelper{
私有静态最终int数据库_VERSION=1；
私有静态最终字符串数据库\u NAME=“detailsDB.db”；
公共静态最终字符串表\u DETAILS=“DETAILS”；
公共静态最终字符串列_ID=“_ID”；
公共静态最终字符串列\u FIRSTNAME=“FIRSTNAME”；
公共静态最终字符串列\u姓氏=“姓氏”；
公共静态最终字符串列\u PHONE=“PHONE”；
公共静态最终字符串列\u EMAIL=“EMAIL”；
公共静态最终字符串列_ADDRESS1=“ADDRESS1”；
公共静态最终字符串列_ADDRESS2=“ADDRESS2”；
公共静态最终字符串表\u KIN\u DETAILS=“kindetails”；
公共静态最终字符串列\u KIN\u ID=“\u ID”；
公共静态最终字符串列\u KIN\u YOUREMAIL=“youremailkin”；
公共静态最终字符串列\u KIN\u FIRSTNAME=“firstnamekin”；
public static final String COLUMN\u KIN\u姓氏=“姓氏KIN”；
公共静态最终字符串列\u KIN\u PHONE=“phonekin”；
公共静态最终字符串列\u KIN\u EMAIL=“emailkin”；
公共静态最终字符串列\u kinu ADDRESS1=“address1kin”；
公共静态最终字符串列\u kinu ADDRESS2=“address2kin”；
//将数据库信息传递给超类
公共MyDBHandler（上下文上下文、字符串名称、SQLiteDatabase.CursorFactory工厂、int版本）{
超级（上下文、数据库名称、工厂、数据库版本）；
}
@凌驾
public void onCreate（SQLiteDatabase db）{
String query=“创建表格”+表格详细信息+”（“
+列ID+“整数主键自动递增，”
+列_FIRSTNAME+“文本，”
+列_姓氏+“文本，”
+列\电话+“文本，”
+列_电子邮件+“文本，”
+列地址1+“文本，”
+列地址2+“文本”
+ ");";
String query2=“创建表格”+表格详细信息+”（“
+列\u KIN\u ID+“整数主键自动递增，”
+列\u kinu\u YOUREMAIL+“文本，”
+列\u KIN\u FIRSTNAME+“TEXT”
+列_KIN_姓氏+“文本，”
+列\u kinu\u PHONE+“文本，”
+列\u kinu\u EMAIL+“文本，”
+列\u kinu\u ADDRESS1+“文本”
+列地址2+“文本”
+ ");";
execSQL（查询）；
db.execSQL（查询2）；
}
@凌驾
public void onUpgrade（SQLiteDatabase db，int-oldVersion，int-newVersion）{
db.execSQL（“如果存在删除表”+表的详细信息）；
db.execSQL（“如果存在删除表”+表的详细信息）；
onCreate（db）；
}
//向数据库中添加新行
公共无效添加详细信息（详细信息）{
ContentValues=新的ContentValues（）；
value.put（COLUMN_FIRSTNAME，details.getFirstname（））；
value.put（列_姓氏，details.get姓氏（））；
value.put（COLUMN_PHONE，details.getPhone（））；
value.put（COLUMN_EMAIL，details.getEmail（））；
value.put（列_ADDRESS1，details.getAddress1（））；
value.put（COLUMN_ADDRESS2，details.getAddress2（））；
SQLiteDatabase db=getWritableDatabase（）；
插入（表_详细信息，空，值）；
db.close（）；
}
公共无效添加KinDetails（KinDetails KinDetails）{
ContentValues=新的ContentValues（）；
value.put（COLUMN\ukinyourEmail，kindetals.getyourEmailkin（））；
put（COLUMN\u KIN\u FIRSTNAME，kindetals.getFirstnamekin（））；
value.put（列_KIN_姓氏，kindetals.getnameskin（））；
value.put（列\ KIN \ PHONE，kindetals.getPhonekin（））；
value.put（COLUMN_KIN_EMAIL，kindetals.getEmailkin（））；
put（第1列，kindetals.getAddress1kin（））；
put（第2列，kindetals.getAddress2kin（））；
SQLiteDatabase db=getWritableDatabase（）；
db.insert（表的详细信息，空，值）；
db.close（）；
}
公共列表getAllDetails（）{
//创建一个新列表，将所有人员放入其中
ListdetailsList=新的ArrayList（）；
SQLiteDatabase db=getWritableDatabase（）；
String query=“SELECT*FROM”+表格\详细信息；
//光标指向结果中的某个位置
游标c=db.rawQuery（查询，空）；
//移动到结果的第一行
如果（c！=null）{
c、 moveToFirst（）；
//最后一行后的位置表示结果结束
而（！c.isAfterLast（））{
//创建新的详细信息对象
详细信息=新的详细信息（）；
//这里使用在类顶部声明的static..不要对表列使用“”
details.set_id（c.getColumnIndex（COLUMN_id））；
setFirstname（c.getString（c.getColumnIndex（COLUMN_FIRSTNAME））；
details.setSurname（c.getString（c.getColumnIndex（COLUMN_姓氏））；
setPhone（c.getString（c.getColumnIndex（COLUMN_PHONE））；
setEmail（c.getString（c.getColumnIndex（COLUMN_EMAIL））；
setAddress1（c.getString（c.getColumnIndex（COLUMN_ADDRESS1））；
setAddress2（c.getString（c.getColumnIndex（COLUMN_ADDRESS2））；
详细信息列表。添加（详细信息）；
c、 moveToNext（）；
}
c、 close（）；
}
db.close（）；
//返回我们的人员名单
返回详细信息列表；
}
}

创建

public class MyFragment extends ListFragment implements 
        LoaderManager.LoaderCallbacks<Cursor> {}

         RecyclerView recyclerView = (RecyclerView) view.findViewById(R.id.my_recycler_view);
         RecyclerView.LayoutManager mLayoutManager;
        dbHelper = new DBHelper(getActivity().getApplicationContext());
        list = MyDBHandler.getAllDetails();
        mLayoutManager = new LinearLayoutManager(getActivity().getApplicationContext());
        recyclerView.setLayoutManager(mLayoutManager);
        c = new CustomAdapter(list); //send the list to the adapter
        recyclerView.setAdapter(c);

<android.support.v7.widget.RecyclerView
        android:id="@+id/my_recycler_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:clipToPadding="false"
        android:scrollbars="vertical"/>

public class CustomAdapter extends RecyclerView.Adapter<CustomAdapter.viewHolder> {
    List<Details> records;

    public class viewHolder extends RecyclerView.ViewHolder {
        public TextView firstname, surname;

        public viewHolder(View v) {
            super(v);
            firstname = (TextView) v.findViewById(R.id.first);
            surname = (TextView) v.findViewById(R.id.last);
        }
    }

    public CustomAdapter(List<Details> records) {
        this.records = records;
    }

    @Override
    public viewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.listrow, parent, false);
        return new viewHolder(v);
    }

    @Override
    public void onBindViewHolder(final viewHolder holder, final int position) {
        Details rec = list.get(position);
        holder.firstname.setText(rec.getFirstname());
        holder.lastname.setText(rec.getSurname);
    }
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:background="@android:color/white"
              android:orientation="vertical">

        <TextView
            android:id="@+id/first"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:paddingBottom="16dp"
            android:textColor="#CC000000"
            android:textSize="16sp"
            android:text=""/>
        <TextView
            android:id="@+id/last"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:paddingBottom="16dp"
            android:textColor="#CC000000"
            android:textSize="16sp"
            android:text=""/>
</LinearLayout>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.companyname.myapplication.FragmentDetails">


<ListView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/frag_details_listView"
    android:layout_weight="1" />

 </LinearLayout>

<?xml version="1.0" encoding="utf-8"?>

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:text="Large Text"
    android:id="@+id/row_details_textview_name"
    android:layout_marginTop="10dp"
    android:layout_marginLeft="10dp" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceSmall"
    android:text="Small Text"
    android:id="@+id/row_details_textview_id"
    android:layout_marginLeft="10dp" /> 

  </LinearLayout>

public class DetailsAdapter extends ArrayAdapter<Person> {

private Context context;

//Constructor
public DetailsAdapter(Context context, int resource, List<Person> objects) {
    super(context, resource, objects);

    this.context = context;
}


//The get view is the most crucial part of the adapter, here the listview asks the 
//adapter for the row to display

@Override
public View getView(int position, View row, ViewGroup parent) {

    //Get an instance of our holder
    Holder holder;


    //Check if this is the first time we are creating this row for the listview
    if (row == null){

        //Row was null and thus we need to get components from the row_details.xml
        holder = new Holder();

        //get the Android's layout inflater service which will read our row_details.xml
        LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        //Fill our row view with the xml layout file
        row = inflater.inflate(R.layout.row_details, null);

        //Fill our holder with the text view components
        holder.textViewName = (TextView)row.findViewById(R.id.row_details_textview_name);
        holder.textViewId = (TextView)row.findViewById(R.id.row_details_textview_id);

        //This is very imp! attach our holder to the row 
        row.setTag(holder);

    }else{

        //row was created before! thus get the holder object from the row tag
        holder = (Holder)row.getTag();
    }


    //At this point we have our row, either created from new or got it from the row tag object
    //we can now fill the data

    //First get our object from the list which is in the position of the listview
    //The position as you can see is passed to the getView method by the listview
    Person person = getItem(position);

    holder.textViewName.setText(person.getFirstname());
    holder.textViewId.setText("ID: " + person.get_id());

    //we are done formatting our row..return to listview to show
    return row;
}

//A holder will be resposable to hold our components to improve listview performance
//We replicate the components we have in the row_details.xml
private class Holder{

    TextView textViewName;
    TextView textViewId;


}

}

public class FragmentDetails extends Fragment {

private List<Details>detailsList = new ArrayList<>();

private ListView mListView;

private DetailsAdapter adapter;

public FragmentDetails() {
    // Required empty public constructor
}


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View rootView = inflater.inflate(R.layout.fragment_details, container, false);

    //get an instance of our listview
    mListView = (ListView)rootView.findViewById(R.id.frag_details_listView);

    //Get the data here!!
    MyDBHandler dbHandler = new MyDBHandler(getActivity().getApplicationContext());
    detailsList = dbHandler.getAllDetails();

    //Initiate our adapter
    adapter = new DetailsAdapter(getActivity().getApplicationContext(), R.layout.row_details, detailsList);

    //set adapter to the listview
    if(adapter != null){
        mListView.setAdapter(adapter);
    }

    return rootView;

}


}

public MyDBHandler(Context context){
    super(context, DATABASE_NAME, null, DATABASE_VERSION);
}