6

你能告诉我如何在数据库中插入值吗？我刚开始在android中开发没有太多经验。

我只创建一个类information，在其中创建名称字段的 getter 和 setter。包 com.example.database_example；

package com.example.database_example;

public class Information {

    String name;
    public Information(String name) {
        // TODO Auto-generated constructor stub
        this.name=name;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

}

现在我创建了另一个数据库类，我想在其中添加插入方法并从数据库中读取数据。

package com.example.database_example;

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

public class DataBaseExample extends SQLiteOpenHelper{

    private static final int DATABASE_VERSION = 1;

    // Database Name
    private static final String DATABASE_NAME = "information";

    // Contacts table name
    private static final String TABLE_Name= "Name";

    // Contacts Table Columns names
    private static final String KEY_ID = "id";
    private static final String KEY_NAME = "name";

    public DataBaseExample(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
        // TODO Auto-generated constructor stub
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        // TODO Auto-generated method stub
        String createTable= "CREATE TABLE " + TABLE_Name+"("
                + KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT," + KEY_NAME + " TEXT,"
                + ")";
        db.execSQL(createTable);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        // TODO Auto-generated method stub
         db.execSQL("DROP TABLE IF EXISTS " + TABLE_Name);

            // Create tables again
            onCreate(db);
    }

    public boolean insertname(Information information) {

        boolean createSuccessful = false;

        ContentValues values = new ContentValues();

      //  values.put(KEY_ID, information.getId());
        values.put(KEY_NAME, information.getName());

        SQLiteDatabase db = this.getWritableDatabase();

        createSuccessful = db.insert(TABLE_Name, null, values) > 0;
        db.close();

        return createSuccessful;
    }

}

Main File

package com.example.database_example;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Information inf=new Information("naveen");
        DataBaseExample dbx=new DataBaseExample(MainActivity.this);
        dbx.insertname(inf);
    }

LogCat

09-24 07:25:07.138: I/Database(392): sqlite returned: error code = 1, msg = near ")": syntax error
09-24 07:25:07.138: E/Database(392): Failure 1 (near ")": syntax error) on 0x2a7080 when preparing 'CREATE TABLE Name(id INTEGER PRIMARY KEY AUTOINCREMENT,name TEXT,)'.
09-24 07:25:07.148: D/AndroidRuntime(392): Shutting down VM
09-24 07:25:07.148: W/dalvikvm(392): threadid=1: thread exiting with uncaught exception (group=0x40015560)
09-24 07:25:07.158: E/AndroidRuntime(392): FATAL EXCEPTION: main
09-24 07:25:07.158: E/AndroidRuntime(392): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.database_example/com.example.database_example.MainActivity}: android.database.sqlite.SQLiteException: near ")": syntax error: CREATE TABLE Name(id INTEGER PRIMARY KEY AUTOINCREMENT,name TEXT,)
09-24 07:25:07.158: E/AndroidRuntime(392):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
09-24 07:25:07.158: E/AndroidRuntime(392):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
09-24 07:25:07.158: E/AndroidRuntime(392):  at android.app.ActivityThread.access$1500(ActivityThread.java:117)
09-24 07:25:07.158: E/AndroidRuntime(392):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
09-24 07:25:07.158: E/AndroidRuntime(392):  at android.os.Handler.dispatchMessage(Handler.java:99)
09-24 07:25:07.158: E/AndroidRuntime(392):  at android.os.Looper.loop(Looper.java:123)
09-24 07:25:07.158: E/AndroidRuntime(392):  at android.app.ActivityThread.main(ActivityThread.java:3683)
09-24 07:25:07.158: E/AndroidRuntime(392):  at java.lang.reflect.Method.invokeNative(Native Method)
09-24 07:25:07.158: E/AndroidRuntime(392):  at java.lang.reflect.Method.invoke(Method.java:507)
09-24 07:25:07.158: E/AndroidRuntime(392):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
09-24 07:25:07.158: E/AndroidRuntime(392):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
09-24 07:25:07.158: E/AndroidRuntime(392):  at dalvik.system.NativeStart.main(Native Method)
09-24 07:25:07.158: E/AndroidRuntime(392): Caused by: android.database.sqlite.SQLiteException: near ")": syntax error: CREATE TABLE Name(id INTEGER PRIMARY KEY AUTOINCREMENT,name TEXT,)
09-24 07:25:07.158: E/AndroidRuntime(392):  at android.database.sqlite.SQLiteDatabase.native_execSQL(Native Method)
09-24 07:25:07.158: E/AndroidRuntime(392):  at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1763)
09-24 07:25:07.158: E/AndroidRuntime(392):  at com.example.database_example.DataBaseExample.onCreate(DataBaseExample.java:34)
09-24 07:25:07.158: E/AndroidRuntime(392):  at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:126)
09-24 07:25:07.158: E/AndroidRuntime(392):  at com.example.database_example.DataBaseExample.insertname(DataBaseExample.java:55)
09-24 07:25:07.158: E/AndroidRuntime(392):  at com.example.database_example.MainActivity.onCreate(MainActivity.java:18)
09-24 07:25:07.158: E/AndroidRuntime(392):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
09-24 07:25:07.158: E/AndroidRuntime(392):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
09-24 07:25:07.158: E/AndroidRuntime(392):  ... 11 more**
4

5 回答 5

6

您的 android sqlite 插入方法可能如下所示：

public boolean create(Information information) {

    boolean createSuccessful = false;

    ContentValues values = new ContentValues();

    values.put(KEY_NAME, information.getName());

    SQLiteDatabase db = this.getWritableDatabase();

    createSuccessful = db.insert(tableName, null, values) > 0;
    db.close();

    return createSuccessful;
}

它可以添加到您的DataBaseExample课程中。

您可以在活动中或任何可能的地方以这种方式使用它。

Information information = new Information(); 
information.setName("naveen"); 

if(new DataBaseExample().create(information)){
    Log.v(TAG, "save ok.");
}else{
    Log.v(TAG, "save failed.");
}

有关更简单的示例，请参见此处。

于 2013-09-24T01:15:29.993 回答
4 
SQLiteDatabase db = this.getWritableDatabase();

ContentValues values = new ContentValues();

values.put("Messsage", msg);
values.put("Name", SenderName);
values.put("GroupName", Groupname);

db.insert("TableName", null, values);
于 2015-04-08T12:12:12.727 回答
1

使用下面的代码 -

mSQLiteDatabase = getWritableDatabase(); //To insert we need to writable //database. If database is not created/opened it will do the job.
ContentValues contentValues = new ContentValues();
contentValues.put(key1,value1);
contentValues.put(key2,value2);
contentValues.put(key3,value3);
//...put the value for all the required colums of a row.....

long rowInserted = mSQLiteDatabase.insert(tablename,"",contentValues);
mSQLiteDatabase.close();//This is very important to close.Never forget this.
if(rowInserted != -1) {
//Insert success.
} else {
//Inser failed.
}
于 2018-01-24T12:36:01.837 回答
1

第一个错误是因为您createTable在最后一列定义之后的字符串中添加了额外的逗号KEY_NAME+" TEXT," 

String createTable= "CREATE TABLE " + TABLE_Name+"("
            + KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT," + KEY_NAME + " TEXT,"
            + ")";

正确的形式如下：

String createTable= "CREATE TABLE " + TABLE_Name+"("
            + KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT," + KEY_NAME + " TEXT"
            + ")";
于 2015-09-22T17:44:36.460 回答
0 
package com.example.hostelmangement;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.logging.Log;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
public class DataBase  {
 DataBaseHelper database;
 int a=0;
 public DataBase(Context con)
         {

           database=new DataBaseHelper(con,"jojo", null,1);
         }
void insertData(String joindate, String name, String fathername, String dateofbirth, String housename, String houseplace, String housepin, String blood, String mobile, String email, String company, String companyplace, String companyphone, String companypin, String rent, String imgphoto, String imgproof)
{
    SQLiteDatabase sqld=database.getWritableDatabase();
    ContentValues cv=new ContentValues();
    cv.put("join_date", joindate);
    cv.put("name", name);
    cv.put("father_name", fathername);      
    cv.put("date_of_birth", dateofbirth);                           
    cv.put("house_name", housename);
    cv.put("place", houseplace);
    cv.put("pin_no", housepin);
    cv.put("blood_group", blood);      
    cv.put("mobile", mobile);                           
    cv.put("email", email);
    cv.put("company", company);
    cv.put("company_place", companyplace);
    cv.put("company_phone", companyphone);
    cv.put("company_pin", companypin);      
    cv.put("rent", rent); 
    cv.put("pending",a+"");
    cv.put("status", "a");
    cv.put("photo",imgphoto); 
    cv.put("proof",imgproof); 
    sqld.insert("demo", null,cv);  
}
public List<User> getDetails()
{
    List<User> ar=new ArrayList<User>();
    SQLiteDatabase sqldg=database.getReadableDatabase();
    Cursor cur=sqldg.rawQuery("select * from demo where status='a' order by name asc" , null);
    if(cur!=null)
    {
        if(cur.moveToFirst())
        {
            do
            {
                User user=new User();
                user.setId(cur.getInt(0));
                user.setJoindate(cur.getString(1));
                user.setName(cur.getString(2));
                user.setFathername(cur.getString(3));
                user.setDateofbirth(cur.getString(4));
                user.setHousename(cur.getString(5));
                user.setPlace(cur.getString(6));
                user.setPinno(cur.getString(7));
                user.setBloodgroup(cur.getString(8));
                user.setMobile(cur.getString(9));
                user.setEmail(cur.getString(10));
                user.setCompany(cur.getString(11));
                user.setCompanyplace(cur.getString(12));
                user.setCompanyphone(cur.getString(13));
                user.setCompanypin(cur.getString(14));
                user.setRent(cur.getString(15));
                user.setPhoto(cur.getString(18));
                user.setProof(cur.getString(19));
                ar.add(user);

            }
            while(cur.moveToNext());
        }
    }

    return ar;
}
public List<User> getDetailsforview(int memberid)
{
    List<User> ar=new ArrayList<User>();
    SQLiteDatabase sqldg=database.getReadableDatabase();
    Cursor cur=sqldg.rawQuery("select * from demo where id="+memberid , null);
    if(cur!=null)
    {
        if(cur.moveToFirst())
        {
            do
            {
                User user=new User();
                user.setId(cur.getInt(0));
                user.setJoindate(cur.getString(1));
                user.setName(cur.getString(2));
                user.setFathername(cur.getString(3));
                user.setDateofbirth(cur.getString(4));
                user.setHousename(cur.getString(5));
                user.setPlace(cur.getString(6));
                user.setPinno(cur.getString(7));
                user.setBloodgroup(cur.getString(8));
                user.setMobile(cur.getString(9));
                user.setEmail(cur.getString(10));
                user.setCompany(cur.getString(11));
                user.setCompanyplace(cur.getString(12));
                user.setCompanyphone(cur.getString(13));
                user.setCompanypin(cur.getString(14));
                user.setRent(cur.getString(15));
                user.setPhoto(cur.getString(18));
                user.setProof(cur.getString(19));
                ar.add(user);

            }
            while(cur.moveToNext());
        }
    }

    return ar;
}
public List<User> getDateSort()
{
    List<User> ar=new ArrayList<User>();
    SQLiteDatabase sqldg=database.getReadableDatabase();
    //Cursor cur=sqldg.rawQuery("select * from demo order by join_date asc", null);
    Cursor cur=sqldg.rawQuery("select * from demo where status='a' order by name asc", null);
    if(cur!=null)
    {
        if(cur.moveToFirst())
        {
            do
            {

                User user=new User();
                user.setId(cur.getInt(0));
                String date=cur.getString(1);
                String date1=date.substring(8, 10);
                user.setJoindate(date1);
                user.setName(cur.getString(2));
                user.setFathername(cur.getString(3));
                user.setDateofbirth(cur.getString(4));
                user.setHousename(cur.getString(5));
                user.setPlace(cur.getString(6));
                user.setPinno(cur.getString(7));
                user.setBloodgroup(cur.getString(8));
                user.setMobile(cur.getString(9));
                user.setEmail(cur.getString(10));
                user.setCompany(cur.getString(11));
                user.setCompanyplace(cur.getString(12));
                user.setCompanyphone(cur.getString(13));
                user.setCompanypin(cur.getString(14));
                user.setRent(cur.getString(15));
                user.setPending(cur.getInt(16));
                user.setPhoto(cur.getString(18));
                user.setProof(cur.getString(19));
                ar.add(user);

            }
            while(cur.moveToNext());
        }
    }

    return ar;
}
public List<User> deactiveMembers() {

    List<User> ar=new ArrayList<User>();
    SQLiteDatabase sqldg=database.getReadableDatabase();
    Cursor cur=sqldg.rawQuery("select * from demo where status='d' order by name asc", null);
    if(cur!=null)
    {
        if(cur.moveToFirst())
        {
            do
            {
                User user=new User();
                user.setId(cur.getInt(0));
                user.setJoindate(cur.getString(1));
                user.setName(cur.getString(2));
                user.setFathername(cur.getString(3));
                user.setDateofbirth(cur.getString(4));
                user.setHousename(cur.getString(5));
                user.setPlace(cur.getString(6));
                user.setPinno(cur.getString(7));
                user.setBloodgroup(cur.getString(8));
                user.setMobile(cur.getString(9));
                user.setEmail(cur.getString(10));
                user.setCompany(cur.getString(11));
                user.setCompanyplace(cur.getString(12));
                user.setCompanyphone(cur.getString(13));
                user.setCompanypin(cur.getString(14));
                user.setRent(cur.getString(15));
                user.setPhoto(cur.getString(18));
                user.setProof(cur.getString(19));
                ar.add(user);

            }
            while(cur.moveToNext());
        }
    }

    return ar;

}
public void Update(String joindate, String name, String fathername, String dateofbirth, String housename, String houseplace, String housepin, String blood, String mobile, String email, String company, String companyplace, String companyphone, String companypin, String rent, int id, String imgphoto, String imgproof)
{
    SQLiteDatabase sqld=database.getWritableDatabase();
    ContentValues cv=new ContentValues();
    cv.put("join_date", joindate);
    cv.put("name", name);
    cv.put("father_name", fathername);      
    cv.put("date_of_birth", dateofbirth);                           
    cv.put("house_name", housename);
    cv.put("place", houseplace);
    cv.put("pin_no", housepin);
    cv.put("blood_group", blood);      
    cv.put("mobile", mobile);                           
    cv.put("email", email);
    cv.put("company", company);
    cv.put("company_place", companyplace);
    cv.put("company_phone", companyphone);
    cv.put("company_pin", companypin);      
    cv.put("rent", rent);
    cv.put("photo", imgphoto);
    cv.put("proof", imgproof);
    sqld.update("demo",cv,"id="+id, null);
}
public void pendinUpdate(int pending, int lastamount)
{
    SQLiteDatabase sqld=database.getWritableDatabase();
    ContentValues cv=new ContentValues();
    cv.put("pending",lastamount);
    sqld.update("demo",cv,"id="+pending, null);
}
public void deleteUpdate(int id)
{
    SQLiteDatabase sqld=database.getWritableDatabase();
    ContentValues cv=new ContentValues();
    cv.put("status","d");
    sqld.update("demo",cv,"id="+id, null);
}
public void activate(int id)
{
    SQLiteDatabase sqld=database.getWritableDatabase();
    ContentValues cv=new ContentValues();
    cv.put("status","a");
    sqld.update("demo",cv,"id="+id, null);
}

}

于 2015-10-14T03:47:48.983 回答