我正在尝试在我的应用程序中为组页面创建数据库。但我不知道如何创造这个。 此页面包含两个文本组。那是我的小组和我的二级小组。这两个组中的每一个都包含用于选择电子邮件ID的微调器。通过选择特定的电子邮件ID，有两个添加和删除按钮。 当我选择一个Id并点击添加按钮然后它保存在服务器端。在点击下方的另一个文本视图点击我可以看到ID被添加。如果我想要添加的这个选择的ID已经存在然后消息display.same for delete按钮。和我的二级组相同。现在我只想知道如何为这个页面创建和存储SQLite数据库，以便从SQLite而不是Web服务器获取数据。
**Fragmentgroups.java**
public class FragmentGroups extends Fragment {
private SharedPreferences pref;
Cursor cursor;
ArrayList<member> membr,membr2;
ListView list1 ;
ListView list2 ;
Button add,delete,add2,delete2;
TextView gp1,gp2;
GroupAdapter groupadapter;
private Typeface ftype;
SendJobDataBase db;
FragmentDialog dialog ;
ArrayList<String> emailArray = new ArrayList<String>();
String memail;
private String login_token;
ArrayAdapter<String> adapter ;
Spinner e1,e2;
String emails[];
public FragmentGroups(){}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.group_fragment, container, false);
e1=(Spinner) rootView.findViewById(R.id.eemail);
e2=(Spinner) rootView.findViewById(R.id.eemail2);
new Members().execute();
add =(Button) rootView.findViewById(R.id.add);
add2 =(Button) rootView.findViewById(R.id.add2);
delete =(Button) rootView.findViewById(R.id.delete);
delete2 =(Button) rootView.findViewById(R.id.delete2);
gp1 =(TextView) rootView.findViewById(R.id.viewm);
gp2 =(TextView) rootView.findViewById(R.id.views);
pref=this.getActivity().getSharedPreferences("Driver", getActivity().MODE_WORLD_READABLE);
login_token = pref.getString("login_token","login_token");
add.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
new AddMembers().execute();
}
});
add2.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
new AddMembers2().execute();
}
});
delete.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
new DeleteMembers().execute();
}
});
delete2.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
new DeleteMembers2().execute();
}
});
gp1.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent intent =new Intent(getActivity() ,viewgroup.class);
startActivity(intent);
}
});
gp2.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent intent2 =new Intent(getActivity() ,viewsecgroup.class);
startActivity(intent2);
}
});
return rootView;
}
private class Members extends AsyncTask<String, String, String[]> {
@Override
protected String[] doInBackground(final String... params)
{
ConnectivityManager conMgr = (ConnectivityManager) getActivity().getSystemService(Context.CONNECTIVITY_SERVICE);
if (conMgr.getActiveNetworkInfo() != null
&& conMgr.getActiveNetworkInfo().isAvailable()
&& conMgr.getActiveNetworkInfo().isConnected())
{
HttpClient httpclient = new DefaultHttpClient();
try
{
JSONObject job= new JSONObject();
job.put("status_key","2");
job.put("method","driver_emails");
job.put("login_token",login_token);
System.out.print(login_token);
StringEntity se = new StringEntity(job.toString());
HttpPost httppost = new HttpPost("http://suntechwebsolutions.com/clients/mobileapp_now/webservice.php");
httppost.setEntity(se);
HttpResponse response = httpclient.execute(httppost);
String data = EntityUtils.toString(response.getEntity());
JSONObject jo = new JSONObject(data);
Log.d("response", jo.toString(4));
JSONArray jArray = jo.getJSONArray("all_driver_email_Ids");
for (int i=0; i < jArray.length(); i++)
{
System.out.println("please print my name...for....");
try {
JSONObject jsob = jArray.getJSONObject(i);
emailArray.add(jsob.getString("Email").toString());
adapter = new ArrayAdapter<String>(getActivity(), R.layout.listrow, emailArray);
} catch (JSONException e) {
}
}
}
catch (Exception e)
{
e.printStackTrace();
}
}
return params;
}
@SuppressLint("NewApi")
@Override
protected void onPostExecute(String[] result)
{
super.onPostExecute(result);
e1.setAdapter(adapter);
e2.setAdapter(adapter);
}
}
private class AddMembers extends AsyncTask<String, String, String[]> {
ProgressDialog pDialog = new ProgressDialog(getActivity());
@Override
protected String[] doInBackground(final String... params)
{
ConnectivityManager conMgr = (ConnectivityManager) getActivity().getSystemService(Context.CONNECTIVITY_SERVICE);
if (conMgr.getActiveNetworkInfo() != null
&& conMgr.getActiveNetworkInfo().isAvailable()
&& conMgr.getActiveNetworkInfo().isConnected())
{
HttpClient httpclient = new DefaultHttpClient();
try
{
JSONObject job= new JSONObject();
memail= e1.getSelectedItem().toString();
System.out.println(memail);
memail.replace("" ,"%20");
job.put("email",memail);
job.put("status_key","2");
job.put("method","add_emails");
job.put("login_token",login_token);
StringEntity se = new StringEntity(job.toString());
HttpPost httppost = new HttpPost("http://suntechwebsolutions.com/clients/mobileapp_now/webservice.php");
httppost.setEntity(se);
HttpResponse response = httpclient.execute(httppost);
String data = EntityUtils.toString(response.getEntity());
Log.i("response", data);
System.out.println("response "+data);
String call;
call = data;
System.out.println("print me............."+call);
JSONObject jo = new JSONObject(data);
Log.d("response", jo.toString(4));
if(jo.getString("err-code").equals("0"))
{
final AlertDialog.Builder alert = new AlertDialog.Builder(getActivity());
alert.setTitle("Alert!!!");
alert.setMessage(jo.getString("message"));
alert.setPositiveButton("Ok",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton)
{
pDialog.dismiss();
dialog.dismiss();
}
});
getActivity().runOnUiThread(new Runnable() {
public void run() {
alert.show();
}
});
}
else
{
final AlertDialog.Builder alert = new AlertDialog.Builder(getActivity());
alert.setTitle("Alert !");
alert.setMessage(jo.getString("message"));
alert.setPositiveButton("Ok",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
dialog.dismiss();
}
});
getActivity().runOnUiThread(new Runnable()
{
public void run()
{
pDialog.dismiss();
alert.show();
}
});
}
}
catch (Exception e)
{
e.printStackTrace();
}
}
return params;
}
@Override
protected void onPostExecute(String[] result)
{
super.onPostExecute(result);
}
}
private class DeleteMembers extends AsyncTask<String, String, String[]> {
ProgressDialog pDialog = new ProgressDialog(getActivity());
@Override
protected String[] doInBackground(final String... params)
{
ConnectivityManager conMgr = (ConnectivityManager) getActivity().getSystemService(Context.CONNECTIVITY_SERVICE);
if (conMgr.getActiveNetworkInfo() != null
&& conMgr.getActiveNetworkInfo().isAvailable()
&& conMgr.getActiveNetworkInfo().isConnected())
{
HttpClient httpclient = new DefaultHttpClient();
try
{
JSONObject job= new JSONObject();
memail= e1.getSelectedItem().toString();
System.out.println("email is " +memail);
memail.replace("" ,"%20");
job.put("email",memail);
job.put("status_key","2");
job.put("method","delete_groupemails");
job.put("login_token",login_token);
StringEntity se = new StringEntity(job.toString());
HttpPost httppost = new HttpPost("http://suntechwebsolutions.com/clients/mobileapp_now/webservice.php");
httppost.setEntity(se);
HttpResponse response = httpclient.execute(httppost);
String data = EntityUtils.toString(response.getEntity());
Log.i("response", data);
System.out.println("response "+data);
String call;
call = data;
System.out.println("print me............."+call);
JSONObject jo = new JSONObject(data);
Log.d("response", jo.toString(4));
if(jo.getString("err-code").equals("0"))
{
final AlertDialog.Builder alert = new AlertDialog.Builder(getActivity());
alert.setTitle("Alert!!!");
alert.setMessage(jo.getString("message"));
alert.setPositiveButton("Ok",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton)
{
pDialog.dismiss();
dialog.dismiss();
}
});
getActivity().runOnUiThread(new Runnable() {
public void run() {
alert.show();
}
});
}
else
{
final AlertDialog.Builder alert = new AlertDialog.Builder(getActivity());
alert.setTitle("Alert !");
alert.setMessage(jo.getString("message"));
alert.setPositiveButton("Ok",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
dialog.dismiss();
}
});
getActivity().runOnUiThread(new Runnable()
{
public void run()
{
pDialog.dismiss();
alert.show();
}
});
}
}
catch (Exception e)
{
e.printStackTrace();
}
}
return params;
}
@Override
protected void onPostExecute(String[] result)
{
super.onPostExecute(result);
}
}
private class AddMembers2 extends AsyncTask<String, String, String[]> {
ProgressDialog pDialog = new ProgressDialog(getActivity());
@Override
protected String[] doInBackground(final String... params)
{
ConnectivityManager conMgr = (ConnectivityManager) getActivity().getSystemService(Context.CONNECTIVITY_SERVICE);
if (conMgr.getActiveNetworkInfo() != null
&& conMgr.getActiveNetworkInfo().isAvailable()
&& conMgr.getActiveNetworkInfo().isConnected())
{
HttpClient httpclient = new DefaultHttpClient();
try
{
JSONObject job= new JSONObject();
memail= e2.getSelectedItem().toString();
System.out.println(memail);
memail.replace("" ,"%20");
job.put("email",memail);
job.put("status_key","2");
job.put("method","add_myscndryemails");
job.put("login_token",login_token);
StringEntity se = new StringEntity(job.toString());
HttpPost httppost = new HttpPost("http://suntechwebsolutions.com/clients/mobileapp_now/webservice.php");
httppost.setEntity(se);
HttpResponse response = httpclient.execute(httppost);
String data = EntityUtils.toString(response.getEntity());
Log.i("response", data);
System.out.println("response "+data);
String call;
call = data;
System.out.println("print me............."+call);
JSONObject jo = new JSONObject(data);
Log.d("response", jo.toString(4));
if(jo.getString("err-code").equals("0"))
{
final AlertDialog.Builder alert = new AlertDialog.Builder(getActivity());
alert.setTitle("Alert!!!");
alert.setMessage(jo.getString("message"));
alert.setPositiveButton("Ok",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton)
{
pDialog.dismiss();
dialog.dismiss();
}
});
getActivity().runOnUiThread(new Runnable() {
public void run() {
alert.show();
}
});
}
else
{
final AlertDialog.Builder alert = new AlertDialog.Builder(getActivity());
alert.setTitle("Alert !");
alert.setMessage(jo.getString("message"));
alert.setPositiveButton("Ok",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
dialog.dismiss();
}
});
getActivity().runOnUiThread(new Runnable()
{
public void run()
{
pDialog.dismiss();
alert.show();
}
});
}
}
catch (Exception e)
{
e.printStackTrace();
}
}
return params;
}
@Override
protected void onPostExecute(String[] result)
{
super.onPostExecute(result);
}
}
private class DeleteMembers2 extends AsyncTask<String, String, String[]> {
ProgressDialog pDialog = new ProgressDialog(getActivity());
@Override
protected String[] doInBackground(final String... params)
{
ConnectivityManager conMgr = (ConnectivityManager) getActivity().getSystemService(Context.CONNECTIVITY_SERVICE);
if (conMgr.getActiveNetworkInfo() != null
&& conMgr.getActiveNetworkInfo().isAvailable()
&& conMgr.getActiveNetworkInfo().isConnected())
{
HttpClient httpclient = new DefaultHttpClient();
try
{
JSONObject job= new JSONObject();
memail= e2.getSelectedItem().toString();
System.out.println("email is " +memail);
memail.replace("" ,"%20");
job.put("email",memail);
job.put("status_key","2");
job.put("method","delete_scndryemails");
job.put("login_token",login_token);
StringEntity se = new StringEntity(job.toString());
HttpPost httppost = new HttpPost("http://suntechwebsolutions.com/clients/mobileapp_now/webservice.php");
httppost.setEntity(se);
HttpResponse response = httpclient.execute(httppost);
String data = EntityUtils.toString(response.getEntity());
Log.i("response", data);
System.out.println("response "+data);
String call;
call = data;
System.out.println("print me............."+call);
JSONObject jo = new JSONObject(data);
Log.d("response", jo.toString(4));
if(jo.getString("err-code").equals("0"))
{
final AlertDialog.Builder alert = new AlertDialog.Builder(getActivity());
alert.setTitle("Alert!!!");
alert.setMessage(jo.getString("message"));
alert.setPositiveButton("Ok",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton)
{
pDialog.dismiss();
dialog.dismiss();
}
});
getActivity().runOnUiThread(new Runnable() {
public void run() {
alert.show();
}
});
}
else
{
final AlertDialog.Builder alert = new AlertDialog.Builder(getActivity());
alert.setTitle("Alert !");
alert.setMessage(jo.getString("message"));
alert.setPositiveButton("Ok",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
dialog.dismiss();
}
});
getActivity().runOnUiThread(new Runnable()
{
public void run()
{
pDialog.dismiss();
alert.show();
}
});
}
}
catch (Exception e)
{
e.printStackTrace();
}
}
return params;
}
@Override
protected void onPostExecute(String[] result)
{
super.onPostExecute(result);
}
}
}
**GroupAdapter.java**
package com.sunmobile.navigationdrawer;
import java.util.ArrayList;
import com.sunmobileappnow.mobileappnow.R;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
public class GroupAdapter extends ArrayAdapter<member> {
GroupAdapter gdb;
Activity activity;
int layoutResourceId;
member user;
ArrayList<member> data = new ArrayList<member>();
ListView l1;
SendJobDataBase db;
FragmentGroups fg;
public GroupAdapter(Activity act, int layoutResourceId,
ArrayList<member> data) {
super(act, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.activity = act;
this.data = data;
notifyDataSetChanged();
}
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
MemberHolder holder = null;
if (row == null) {
LayoutInflater inflater = LayoutInflater.from(activity);
row = inflater.inflate(layoutResourceId, parent, false);
holder = new MemberHolder();
holder.name = (TextView) row.findViewById(R.id.user_name_txt);
holder.delete = (Button) row.findViewById(R.id.btn_delete);
row.setTag(holder);
} else {
holder = (MemberHolder) row.getTag();
}
user = data.get(position);
holder.name.setText(user.getName());
holder.delete.setOnClickListener(new OnClickListener() {
public void onClick(final View v) {
AlertDialog.Builder adb = new AlertDialog.Builder(activity);
adb.setTitle("Delete?");
adb.setMessage("Are you sure you want to delete ");
final int user_id = Integer.parseInt(v.getTag().toString());
adb.setNegativeButton("Cancel", null);
adb.setPositiveButton("Ok",
new AlertDialog.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
// MyDataObject.remove(positionToRemove);
SendJobDataBase dBHandler = new SendJobDataBase(
activity.getApplicationContext());
dBHandler.Delete_Contact(user_id);
}
});
adb.show();
}
});
return row;
}
class MemberHolder {
TextView name;
Button delete;
}
}
答案 0 :(得分：2)
我用于SQLite数据库交互的模板如下：
创建数据库的助手：
public class DatabaseHelper extends SQLiteOpenHelper
{
private static final String DATABASE_NAME = "database.db";
private static final int DATABASE_VERSION = 1;
public DatabaseHelper(Context context)
{
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase database)
{
Table1.onCreate(database);
Table2.onCreate(database);
Table3.onCreate(database);
}
@Override
public void onUpgrade(SQLiteDatabase database, int oldVersion, int newVersion)
{
Table1.onUpgrade(database, oldVersion, newVersion);
Table2.onUpgrade(database, oldVersion, newVersion);
Table3.onUpgrade(database, oldVersion, newVersion);
}
}
以表格为例：
public class Table1
{
public static final String TABLE_TABLE1 = "table1";
public static final String COLUMN_ID = "_id";
public static final String COLUMN_NAME = "name";
public static final String COLUMN_PHONENUMBER = "phoneNumber";
public static final String COLUMN_EMAIL = "email";
private static final String DATABASE_CREATE = "create table " + TABLE_TABLE1 + "("
+ COLUMN_ID + " integer primary key autoincrement, "
+ COLUMN_NAME + " text not null, "
+ COLUMN_PHONENUMBER + " text not null, "
+ COLUMN_EMAIL + " text not null, "
+ ");";
public static void onCreate(SQLiteDatabase database)
{
database.execSQL(DATABASE_CREATE);
}
public static void onUpgrade(SQLiteDatabase database, int oldVersion, int newVersion)
{
Log.w(Table1.class.getName(), "Upgrading from version " + oldVersion + " to " + newVersion);
database.execSQL("DROP TABLE IF EXISTS " + TABLE_TABLE1);
onCreate(database);
}
}
表格的操作：
public class Table1DataSource
{
// Database fields
private SQLiteDatabase database;
private DatabaseHelper dbHelper;
private String[] allColumns = { Table1.COLUMN_ID, Table1.COLUMN_NAME,
Table1.COLUMN_PHONENUMBER, Table1.COLUMN_EMAIL };
public Table1DataSource(Context context)
{
dbHelper = new DatabaseHelper(context);
}
public void open() throws SQLException
{
database = dbHelper.getWritableDatabase();
}
public void close()
{
dbHelper.close();
}
private EmployeeDB cursorToEmployee(Cursor cursor)
{
EmployeeDB Employee = new EmployeeDB();
Employee.setId(cursor.getLong(0));
Employee.setName(cursor.getString(1));
Employee.setPhoneNumber(cursor.getString(2));
Employee.setEmail(cursor.getString(3));
return Employee;
}
public EmployeeDB createEmployee(String name, String phoneNumber, String email)
{
ContentValues values = new ContentValues();new
values.put(Table1.COLUMN_NAME, name);
values.put(Table1.COLUMN_PHONENUMBER, phoneNumber);
values.put(Table1.COLUMN_EMAIL, email);
long insertId = database.insert(Table1.TABLE_TABLE1, null, values);
Cursor cursor = database.query(Table1.TABLE_TABLE1, allColumns, Table1.COLUMN_ID
+ " = " + insertId, null, null, null, null);
cursor.moveToFirst();
EmployeeDB newEmployee = cursorToEmployee(cursor);
cursor.close();
return newEmployee;
}
public void updateEmployee(EmployeeDB employee)
{
ContentValues values = new ContentValues();
values.put(Table1.COLUMN_NAME, name);
values.put(Table1.COLUMN_PHONENUMBER, phoneNumber);
values.put(Table1.COLUMN_EMAIL, email);
database.update(Table1.TABLE_TABLE1, values, Table1.COLUMN_ID + " = ?", new String[]{""+employee.getId()});
}
public void deleteEmployee(EmployeeDB Employee)
{
long id = Employee.getId();
database.delete(EmployeeTable.TABLE_EMPLOYEE, EmployeeTable.COLUMN_ID + " = " + id, null);
}
public Cursor getAllEmployees()
{
return database.query(EmployeeTable.TABLE_EMPLOYEE, allColumns, null, null, null, null, null);
}
public EmployeeDB findEmployeeById(long id)
{
EmployeeDB employee = null;
Cursor cursor = database.query(EmployeeTable.TABLE_EMPLOYEE, allColumns, EmployeeTable.COLUMN_ID + " = ?", new String[] {""+id}, null, null, null);
if(cursor.moveToFirst())
{
employee = cursorToEmployee(cursor);
}
return employee;
}
public List<EmployeeDB> getAllEmployeesList()
{
List<EmployeeDB> Employees = new ArrayList<EmployeeDB>();
Cursor cursor = getAllEmployees();
if (cursor.moveToFirst())
{
do
{
EmployeeDB Employee = cursorToEmployee(cursor);
Employees.add(Employee);
}
while (cursor.moveToNext());
}
cursor.close();
return Employees;
}
}
编辑：稍微更新一些版本（在2017-04-29中重访）：
public class DatabaseManager
extends SQLiteOpenHelper {
public interface Table {
String getTableName();
Fields[] getFields();
void onCreate(SQLiteDatabase database);
void onUpgrade(SQLiteDatabase database, int oldVersion, int newVersion);
}
public interface Fields {
String getFieldName();
String getFieldType();
String getFieldAdditional();
}
public interface QueryDefinition {
Cursor query(SQLiteDatabase database, Table table, String[] allFields);
}
private static final String DATABASE_NAME = "database.db";
private static final int DATABASE_VERSION = 1;
private final List<Table> tables;
private SQLiteDatabase database;
public DatabaseManager(Context appContext, List<Table> tables) {
super(appContext, DATABASE_NAME, null, DATABASE_VERSION);
this.tables = tables;
this.database = getWritableDatabase();
}
@Override
public void onCreate(SQLiteDatabase database) {
for(Table table : tables) {
table.onCreate(database);
}
}
@Override
public void onUpgrade(SQLiteDatabase database, int oldVersion, int newVersion) {
for(Table table : tables) {
table.onUpgrade(database, oldVersion, newVersion);
}
}
public interface Transaction {
void execute(SQLiteDatabase sqLiteDatabase);
}
public interface Mapper<T> {
T from(Cursor cursor);
ContentValues from(ContentValues contentValues, T t);
}
public void executeTransaction(Transaction transaction) {
try {
database.beginTransaction();
transaction.execute(database);
database.setTransactionSuccessful();
} finally {
if(database.inTransaction()) {
database.endTransaction();
}
}
}
public <T> List<T> findAll(Table table, Mapper<T> mapper) {
return findAll(table,
mapper, (database, _table, allFields) -> database.query(_table.getTableName(), allFields, null, null, null, null, null));
}
public <T> List<T> findAll(Table table, Mapper<T> mapper, QueryDefinition queryDefinition) {
String[] allFields = extractFieldsFromTable(table);
Cursor cursor = queryDefinition.query(database, table, allFields);
List<T> list = collectObjectFromCursor(mapper, cursor);
cursor.close();
return list;
}
private <T> List<T> collectObjectFromCursor(Mapper<T> mapper, Cursor cursor) {
List<T> list = new LinkedList<>();
if(cursor.moveToFirst()) {
do {
T object = mapper.from(cursor);
list.add(object);
} while(cursor.moveToNext());
}
return new ArrayList<>(list);
}
@NonNull
private String[] extractFieldsFromTable(Table table) {
Fields[] _fields = table.getFields();
String[] fields = new String[_fields.length];
int i = 0;
for(Fields field : _fields) {
fields[i++] = field.getFieldName();
}
return fields;
}
}
public abstract class BaseTable
implements DatabaseManager.Table {
@Override
public void onCreate(SQLiteDatabase database) {
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append("CREATE TABLE ");
stringBuilder.append(getTableName());
stringBuilder.append("(");
DatabaseManager.Fields[] fields = getFields();
int size = fields.length;
int i = 0;
for(DatabaseManager.Fields field : fields) {
stringBuilder.append(field.getFieldName());
stringBuilder.append(" ");
stringBuilder.append(field.getFieldType());
stringBuilder.append(" ");
if(field.getFieldAdditional() != null) {
stringBuilder.append(field.getFieldAdditional());
}
if(i < size - 1) {
stringBuilder.append(",");
}
i++;
}
stringBuilder.append(");");
database.execSQL(stringBuilder.toString());
}
@Override // TODO: implement migration
public void onUpgrade(SQLiteDatabase database, int oldVersion, int newVersion) {
Log.w("Table[" + getTableName() + "]", "Upgrading from version " + oldVersion + " to " + newVersion);
database.execSQL("DROP TABLE IF EXISTS " + getTableName());
onCreate(database);
}
}
public enum Tables {
CAT(new CatTable());
private DatabaseManager.Table table;
Tables(DatabaseManager.Table table) {
this.table = table;
}
public <T extends DatabaseManager.Table> T getTable() {
//noinspection unchecked
return (T) table;
}
public static List<DatabaseManager.Table> getTables() {
Tables[] _tables = Tables.values();
List<DatabaseManager.Table> tables = new ArrayList<>(_tables.length);
for(Tables table : _tables) {
tables.add(table.table);
}
return tables;
}
}
public class CatTable
extends BaseTable {
public static final String NAME = "cat";
public enum Fields
implements DatabaseManager.Fields {
ID("_id", "text", "primary key"), //"integer", "primary key autoincrement"),
URL("url", "text", "not null"),
SOURCE_URL("sourceUrl", "text", "not null");
private String fieldName;
private String fieldType;
private String fieldAdditional;
Fields(String fieldName, String fieldType, String fieldAdditional) {
this.fieldName = fieldName;
this.fieldType = fieldType;
this.fieldAdditional = fieldAdditional;
}
public String getFieldName() {
return fieldName;
}
public String getFieldType() {
return fieldType;
}
public String getFieldAdditional() {
return fieldAdditional;
}
}
@Override
public String getTableName() {
return NAME;
}
@Override
public DatabaseManager.Fields[] getFields() {
return Fields.values();
}
}
public class CatMapper
implements DatabaseManager.Mapper<Cat> {
@Override
public Cat from(Cursor cursor) {
return Cat.create(cursor.getString(0), cursor.getString(1), cursor.getString(2));
}
@Override
public ContentValues from(ContentValues contentValues, Cat cat) {
contentValues.put(CatTable.Fields.ID.getFieldName(), cat.id());
contentValues.put(CatTable.Fields.URL.getFieldName(), cat.url());
contentValues.put(CatTable.Fields.SOURCE_URL.getFieldName(), cat.sourceUrl());
}
}
public class CatDao {
CatTable catTable;
CatMapper catMapper;
DatabaseManager databaseManager;
public CatDao(CatTable catTable, CatMapper catMapper, DatabaseManager databaseManager) {
this.catTable = catTable;
this.catMapper = catMapper;
this.databaseManager = databaseManager;
}
public List<Cat> findAll() {
return databaseManager.findAll(catTable, catMapper);
}
public void insert(List<Cat> cats) {
databaseManager.executeTransaction(sqLiteDatabase -> {
ContentValues contentValues = new ContentValues();
for(Cat cat : cats) {
contentValues = mapper.from(contentValues, cat);
sqLiteDatabase.insertWithOnConflict(catTable.getTableName(), null, contentValues, SQLiteDatabase.CONFLICT_REPLACE);
}
});
}
}
@AutoValue
public abstract class Cat {
public abstract String id();
public abstract String url();
public abstract String sourceUrl();
public static Cat create(String id, String url, String sourceUrl) {
return new AutoValue_Cat.Builder().setId(id).setUrl(url).setSourceUrl(sourceUrl).build();
}
public Builder toBuilder() {
return new AutoValue_Cat.Builder(this);
}
@AutoValue.Builder
public abstract static class Builder {
public abstract Builder setId(String id);
public abstract Builder setUrl(String url);
public abstract Builder setSourceUrl(String sourceUrl);
public abstract Cat build();
}
}