我正在开发一个我存储数据的应用程序。除了更新之外，操作，插入，更新和选择它们都正常工作。
当我更新数据库时，我的应用程序崩溃了，它发出以下错误：
没有这样的专栏
我检查了很多次，但我找不到问题。
下面我分享了我到目前为止编写的代码。
Register.java
/**
* Created by yadapras on 7/8/2016.
*/
public class Register {
String phone_no;
String uname,password,re_password,name,email,imei_no,dev_model;
int os_version;
public void setUname(String uname)
{
this.uname = uname;
}
public String getUname()
{
return this.uname;
}
public void setPassword(String password)
{
this.password = password;
}
public String getPassword()
{
return this.password;
}
public void setRe_password(String re_password)
{
this.re_password = re_password;
}
public String getRe_password()
{
return this.re_password;
}
public void setName(String name)
{
this.name = name;
}
public String getName()
{
return this.name;
}
public void setEmail(String email)
{
this.email = email;
}
public String getEmail()
{
return this.email;
}
public void setPhone_no(String phone_no)
{
this.phone_no = phone_no;
}
public String getPhone_no()
{
return this.phone_no;
}
public void setImei_no(String imei_no)
{
this.imei_no = imei_no;
}
public String getImei_no()
{
return this.imei_no;
}
public void setDev_model(String dev_model)
{
this.dev_model=dev_model;
}
public String getDev_model()
{
return this.dev_model;
}
public void setOs_version(int os_version)
{
this.os_version = os_version;
}
public int getOs_version()
{
return this.os_version;
}
}
MainActivity.java
package com.example.yadapras.mobiltyemp;
import android.content.Context;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.VectorEnabledTintResources;
import android.telephony.TelephonyManager;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
/**
* Created by yadapras on 6/26/2016.
*/
public class MainActivity extends AppCompatActivity {
EditText a,b;
String usr,pass;
DatabaseHelper helper = new DatabaseHelper(this);
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void onButtonClick(View v)
{
if (v.getId() == R.id.BLogin)
{
a = (EditText)findViewById(R.id.userName);
usr = a.getText().toString();
b = (EditText)findViewById(R.id.userPassword);
pass = b.getText().toString();
String password = null;
if( a.getText().toString().length() == 0 || usr == "" || usr == null)
a.setError( " User name is required!" );
if( b.getText().toString().length() == 0 || pass =="" || pass == null)
b.setError( "Password is required!" );
else{
password = helper.searchPass(usr);
}
if (pass.equals(password) && password != null)
{
Intent intent = new Intent(getApplicationContext(), EmpDetail.class);
intent.putExtra("usr",usr);
TelephonyManager telephonyManager = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
String uid = telephonyManager.getDeviceId();
String manufacturer = Build.MANUFACTURER; // Not used in current scenario
String model = Build.MODEL;
int version = Build.VERSION.SDK_INT;
String versionRelease = Build.VERSION.RELEASE; // not used in current scenario
String msg = "IMEI No: "+uid+"\n"+"Manufacturer is :"+manufacturer+"\n"+"Model is :"+model+"\n"+"Os Version is :"+version+"\n"+"VersionRelease is :"+versionRelease;
Toast toast = Toast.makeText(MainActivity.this,msg,Toast.LENGTH_LONG);
toast.show();
Register r = new Register();
r.setImei_no(uid);
r.setDev_model(model);
r.setOs_version(version);
r.setUname(usr);
helper.updateTable(r); /*For updating table with new Coloumn*/
startActivity(intent);
}
else
{
Toast err_pass = Toast.makeText(MainActivity.this,"UserName and Password don't Match",Toast.LENGTH_SHORT);
err_pass.show();
}
}
if (v.getId() == R.id.BSignup)
{
Intent intent = new Intent(getApplicationContext(), Registration.class);
startActivity(intent);
}
}
}
DataBaseHelper.java
package com.example.yadapras.mobiltyemp;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.DatabaseUtils;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.ArrayMap;
import android.util.Log;
import org.json.JSONException;
import org.json.JSONObject;
/**
* Created by yadapras on 7/8/2016.
*/
public class DatabaseHelper extends SQLiteOpenHelper {
private static final int DATABASE_VERSION = 1;
private static final String DATABASE_NAME = "registrationDB.db";
public static final String TABLE_NAME = "registrations";
public static final String COLUMN_ID = "id";
public static final String COLUMN_USERNAME = "username";
public static final String COLUMN_PASSWORD= "password";
public static final String COLUMN_RE_PASSWORD= "re_password";
public static final String COLUMN_NAME= "name";
public static final String COLUMN_EMAIL= "email";
public static final String COLUMN_PHONE_NO= "phone_no";
/*Adding three coloumn IMEI_NO,OS_Version,Model_Device Respectively*/
public static final String COLUMN_IMEI_NO = "imei_no";
public static final String COLUMN_DEV_MODEL = "dev_model";
public static final String COLUMN_OS_VERSION = "os_version";
SQLiteDatabase sqLiteDatabase;
private static final String TABLE_CREATE = "create table registrations(id integer primary key not null, " +
"username text not null, password text not null, re_password text not null, name text not null, email text not null," +
"phone_no number not null,imei_no text, dev_model text, os_version text);";
public DatabaseHelper(Context context) {
super(context,DATABASE_NAME,null,DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase sqLiteDatabase) {
sqLiteDatabase.execSQL(TABLE_CREATE);
this.sqLiteDatabase=sqLiteDatabase;
Log.d("#####Table Value",TABLE_CREATE);
}
@Override
public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {
String query = "DROP TABLE IF EXISTS " +TABLE_NAME ;
sqLiteDatabase.execSQL(query);
this.onCreate(sqLiteDatabase);
}
public void registerUser(Register r) {
/*Inserting anything in to the dataBase make sure it should be writable*/
sqLiteDatabase = getWritableDatabase();
ContentValues values = new ContentValues();
String query = "select * from registrations";
Cursor cursor = sqLiteDatabase.rawQuery(query,null);
int count = cursor.getCount();
Log.d("##count",""+count);
values.put(COLUMN_ID,count);
Log.d("##id",r.getUname());
values.put(COLUMN_USERNAME,r.getUname());
values.put(COLUMN_PASSWORD,r.getPassword());
values.put(COLUMN_RE_PASSWORD,r.getRe_password());
values.put(COLUMN_NAME,r.getName());
values.put(COLUMN_EMAIL, r.getEmail());
values.put(COLUMN_PHONE_NO, r.getPhone_no());
sqLiteDatabase.insert(TABLE_NAME, null,values); /*this will insert Register object in to the Database*/
sqLiteDatabase.close();
}
public String searchPass(String usr) {
sqLiteDatabase = this.getReadableDatabase();
String query = "select username,password from "+TABLE_NAME;
Cursor cursor = sqLiteDatabase.rawQuery(query,null);
String a,b ; // a and b will be userName and Password respectively
b = "Not Found";
if (cursor.moveToFirst())
{
do {
a = cursor.getString(0);
Log.d("##username from db",a);
if (a.equals(usr))
{
b = cursor.getString(1);
break;
}
}while (cursor.moveToNext());
}
return b;
}
public JSONObject showDetail(String usr) {
sqLiteDatabase = this.getReadableDatabase();
String query ="SELECT * FROM registrations where username='"+usr+"'" ;//"select * from registrations where username = p";
Cursor cursor = sqLiteDatabase.rawQuery(query,null);
JSONObject data = new JSONObject();
if (cursor.moveToFirst()){
do {
int columnsQty = cursor.getColumnCount();
for (int idx=0; idx<columnsQty; ++idx) {
try {
data.put(cursor.getColumnName(idx),cursor.getString(idx));
} catch (JSONException e) {
e.printStackTrace();
}
}
}while (cursor.moveToNext());
}
cursor.close();
Log.d("###Data Value",data.toString());
return data;
}
public void updateTable(Register r) {
SQLiteDatabase db = getWritableDatabase();
ContentValues cv = new ContentValues();
cv.put(COLUMN_IMEI_NO,r.getImei_no());
Log.d("###Column_IMEI_NO",r.getImei_no());
cv.put(COLUMN_DEV_MODEL,r.getDev_model());
cv.put(COLUMN_OS_VERSION,r.getOs_version());
db.update(TABLE_NAME,cv,"username = "+r.getUname(),null);
}
}
// LOG生成： -
07-19 18:21:20.246 15581-15581/com.example.yadapras.mobiltyemp D/##username from db: h
07-19 18:21:20.256 15581-15581/com.example.yadapras.mobiltyemp D/###Column_IMEI_NO: 356619054923013
07-19 18:21:20.257 15581-15581/com.example.yadapras.mobiltyemp E/SQLiteLog: (1) no such column: h
07-19 18:21:20.259 15581-15581/com.example.yadapras.mobiltyemp D/AndroidRuntime: Shutting down VM
07-19 18:21:20.260 15581-15581/com.example.yadapras.mobiltyemp E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.yadapras.mobiltyemp, PID: 15581
java.lang.IllegalStateException: Could not execute method for android:onClick
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: android.database.sqlite.SQLiteException: no such column: h (code 1): , while compiling: UPDATE registrations SET imei_no=?,os_version=?,dev_model=? WHERE username = h
at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:889)
at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:500)
at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
at android.database.sqlite.SQLiteDatabase.updateWithOnConflict(SQLiteDatabase.java:1574)
at android.database.sqlite.SQLiteDatabase.update(SQLiteDatabase.java:1522)
at com.example.yadapras.mobiltyemp.DatabaseHelper.updateTable(DatabaseHelper.java:146)
at com.example.yadapras.mobiltyemp.MainActivity.onButtonClick(MainActivity.java:72)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
at android.view.View.performClick(View.java:4780)
at android.view.View$PerformClick.run(View.java:19866)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
07-19 18:25:45.117 15581-15591/com.example.yadapras.mobiltyemp W/art: Suspending all threads took: 10.528ms
07-19 18:26:20.304 15581-15581/com.example.yadapras.mobiltyemp I/Process: Sending signal. PID: 15581 SIG: 9
答案 0 :(得分：4)
问题是更新查询的语法
您的版本：
db.update(TABLE_NAME,cv,"username = "+r.getUname(),null);
像这样更新。
db.update(TABLE_NAME,cv,"username = ?",new String[]{r.getUname()});
这将解决问题。
答案 1 :(得分：3)
试试这个：
public void updateTable(Register r) {
SQLiteDatabase db = getWritableDatabase();
ContentValues cv = new ContentValues();
cv.put(COLUMN_IMEI_NO,r.getImei_no());
Log.d("###Column_IMEI_NO",r.getImei_no());
cv.put(COLUMN_DEV_MODEL,r.getDev_model());
cv.put(COLUMN_OS_VERSION,r.getOs_version());
String updateQuery = "Update registrations set " + COLUMN_IMEI_NO + " = '"+ r.getImei_no() +"' where " + COLUMN_USERNAME + "="+"'"+ r.getUname() +"'";
database.execSQL(updateQuery);
database.close();
}
答案 2 :(得分：1)
//更新单个联系人的代码.Contact是您设置数据的getter setter
public int updateContact(Contact contact) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_NAME, contact.getName());
values.put(KEY_PH_NO, contact.getPhoneNumber());
// updating row
return db.update(TABLE_CONTACTS, values, KEY_ID + " = ?",
new String[] { String.valueOf(contact.getID()) });
}
答案 3 :(得分：0)
Try Like This (this works for me)
public boolean rowIdExists(String StrId) {
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery("select id from " + TABLE_Name
+ " where id=?", new String[]{StrId});
boolean exists = (cursor.getCount() > 0);
/*cursor.close();
db.close();*/
return exists;
}
public void insertuserrate(String Str[], Context cxt) {
// TODO Auto-generated method stub
/*
Cursor c = null;
*/
String strId = "";
//ArrayList<String> userRatepoit= new ArrayList<String>();
try {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
{
values.put(KEY_RID, Str[0]);
values.put(ALL_name, Str[1]);
values.put(ALL_isbn, Str[2]);
values.put(ALL_catid, Str[3]);
if (rowIdExists(Str[0])) {
db.update(TABLE_Name, values, "id " + "=" + Str[0], null);
Log.d("update success", TABLE_Name);
} else {
db.insert(TABLE_Name, null, values);
Log.d("inserted success", TABLE_Name);
}
// Closing database connection
}
try {
db.close();
} catch (Exception e) {
e.printStackTrace();
}
} catch (Exception e) {
e.printStackTrace();
}
}