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這是一個簡單的登錄和註冊應用程序，我試圖創建一個額外的功能來顯示數據庫的歷史。註冊頁面正常工作。然而，當我嘗試登錄或打開數據庫，我收到以下錯誤信息： -簡單的登錄，註冊和顯示數據庫的Android應用程序。但登錄和顯示數據庫沒有響應。獲取SQLite異常
Process: com.example.princebhura.hopon, PID: 13301
android.database.sqlite.SQLiteException: no such column: uid (code 1): , while compiling: Select uid pass, fromcontacts
at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:919)
at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:530)
at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:47)
at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1379)
at android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1318)
at com.example.princebhura.hopon.DatabaseHelper.search(DatabaseHelper.java:58)
at com.example.princebhura.hopon.Login$1.onClick(Login.java:51)
at android.view.View.performClick(View.java:4785)
at android.view.View$PerformClick.run(View.java:19858)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:155)
at android.app.ActivityThread.main(ActivityThread.java:5696)
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:1028)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:823)
Login.java
package com.example.princebhura.hopon;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;``
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class Login extends AppCompatActivity {
private static EditText username;
private static EditText password;
private static Button login_button;
private static Button signup_button;
private static Button showdatabase_button;
private static String history;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
System.out.println("hiii");
Button();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_login, menu);
return true;
}
DatabaseHelper helper= new DatabaseHelper(this);
public void Button(){
username = (EditText)findViewById(R.id.editText);
final String uidstr=username.getText().toString();
password = (EditText)findViewById(R.id.editText2);
final String passwordstr=password.getText().toString();
login_button = (Button) findViewById(R.id.button);
signup_button= (Button) findViewById(R.id.button_signup);
showdatabase_button=(Button)findViewById(R.id.button3);
//System.out.println(history);
login_button.setOnClickListener(
new View.OnClickListener() {
@Override
public void onClick(View v) {
String pass= helper.search(uidstr);
if (passwordstr.equals(pass)==true){
Toast.makeText(Login.this, "Username and password is correct",
Toast.LENGTH_SHORT).show();
Intent intent = new Intent(Login.this, user.class);
startActivity(intent);
}
else{
Toast.makeText(Login.this, "Username and password is NOT correct",
Toast.LENGTH_SHORT).show();
Button();
}
}
}
);
signup_button.setOnClickListener(
new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Login.this, SignUp.class);
startActivity(intent);
}
});
showdatabase_button.setOnClickListener(
new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Login.this, History.class);
history = helper.gethistory();
intent.putExtra("Database History:\n", history);
startActivity(intent);
}
}
);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
註冊 包com.example.princebhura.hopon;
import android.provider.ContactsContract;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class SignUp extends AppCompatActivity {
DatabaseHelper helper = new DatabaseHelper(this);
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sign_up);
}
private static EditText name;
private static EditText email;
private static EditText uid;
private static EditText pass1;
private static EditText pass2;
private static Button signup_button1;
private static String namestr;
private static String emailstr;
private static String uidstr;
private static String pass1str;
private static String pass2str;
public void onsignupClick(View v)
{
if(v.getId()==R.id.button2) {
name = (EditText) findViewById(R.id.Name);
email = (EditText) findViewById(R.id.Email);
uid = (EditText) findViewById(R.id.Uid);
pass1 = (EditText) findViewById(R.id.Pass1_text);
pass2 = (EditText) findViewById(R.id.Pass2_text);
signup_button1 = (Button) findViewById(R.id.button2);
namestr = name.getText().toString();
emailstr = email.getText().toString();
uidstr = uid.getText().toString();
pass1str = pass1.getText().toString();
pass2str = pass2.getText().toString();
// System.out.println(pass1str + " " + pass2str);
if (pass1str.equals(pass2str)) {
Contact c = new Contact();
c.setName(namestr);
c.setEmail(emailstr);
c.setPassword(pass1str);
c.setUid(uidstr);
helper.insertContacts(c);
Toast temp = Toast.makeText(SignUp.this, "SignUp Complete. Please Login", Toast.LENGTH_SHORT);
temp.show();
}
else {
Toast temp = Toast.makeText(SignUp.this, "Passwords dont match!", Toast.LENGTH_SHORT);
temp.show();
}
}
}
@Override
public boolean onCreateOptionsMenu (Menu menu){
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_sign_up, menu);
return true;
}
@Override
public boolean onOptionsItemSelected (MenuItem item){
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
DatabaseHelper
package com.example.princebhura.hopon;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
/**
* Created by princebhura on 11/02/16.
*/
public class DatabaseHelper extends SQLiteOpenHelper {
String TAG= "DatabaseHelper";
private static final int DATABASE_VERSION = 1;
private static final String DATABASE_NAME = "contacts.db";
private static final String TABLE_NAME = "contacts";
private static final String COLUMN_ID = "id";
private static final String COLUMN_NAME = "name";
private static final String COLUMN_EMAIL = "email";
private static final String COLUMN_UID = "uid";
private static final String COLUMN_PASS = "pass";
SQLiteDatabase db;
private static final String TABLE_CREATE = "create table contacts(id integer primary key not null , " +
"name text not null, email text not null, uid text not null , pass text not null)";
public DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
public void insertContacts(Contact c) {
db = this.getWritableDatabase();
ContentValues values = new ContentValues();
String query="Select * from contacts";
Cursor cursor=db.rawQuery(query, null);
int count=cursor.getCount();
values.put(COLUMN_ID, count);
values.put(COLUMN_NAME, c.getName());
values.put(COLUMN_EMAIL, c.getEmail());
values.put(COLUMN_UID, c.getUid());
values.put(COLUMN_PASS, c.getPass());
db.insert(TABLE_NAME, null, values);
db.close();
}
public String gethistory() {
String hist= getTableAsString(db, TABLE_NAME);
return hist;
}
public String search(String userid) {
db = this.getReadableDatabase();
String query = "Select uid pass, from" + TABLE_NAME;
Cursor cursor= db.rawQuery(query,null);
String a, b="Not found#!2334";
if(cursor.moveToFirst())
{
do
{
a=cursor.getString(0);
if(a.equals(userid)) {
b = cursor.getString(1);
break;
}
}
while (cursor.moveToNext());
}
return b;
}
public String getTableAsString(SQLiteDatabase db, String tableName) {
Log.d(TAG, "getTableAsString called");
String tableString = String.format("Table %s:\n", tableName);
Cursor allRows = db.rawQuery("SELECT * FROM " + tableName, null);
if (allRows.moveToFirst()){
String[] columnNames = allRows.getColumnNames();
do {
for (String name: columnNames) {
tableString += String.format("%s: %s\n", name,
allRows.getString(allRows.getColumnIndex(name)));
}
tableString += "\n";
} while (allRows.moveToNext());
}
return tableString;
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(TABLE_CREATE);
this.db = db;
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
String query = "Drop Table if exists" + TABLE_NAME;
db.execSQL(query);
this.onCreate(db);
}
}
聯繫 包com.example.princebhura.hopon;
/**
* Created by princebhura on 11/02/16.
*/
public class Contact {
int id;
String name, email, uid, pass;
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 setUid(String uid)
{
this.uid=uid;
}
public String getUid()
{
return this.uid;
}
public void setPassword(String pass)
{
this.pass=pass;
}
public String getPass()
{
return this.pass;
}
}
歷史
package com.example.princebhura.hopon;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
public class History extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_history);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_history, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
mainfest //manifest.xml
<application
android:allowBackup="true"
android:icon="@mipmap/hop"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".Login"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".user"
android:label="@string/title_activity_user" >
<intent-filter>
<action android:name="com.example.princebhura.hopon.user" />
<category android:name="android.intent.category.default" />
</intent-filter>
</activity>
<activity
android:name=".SignUp"
android:label="@string/title_activity_sign_up" >
<intent-filter>
<action android:name="com.example.princebhura.hopon.SignUp" />
<category android:name="android.intent.category.default" />
</intent-filter>
</activity>
<activity
android:name=".History"
android:label="@string/title_activity_history" >
<intent-filter>
<action android:name="com.example.princebhura.hopon.History" />
<category android:name="android.intent.category.default" />
</intent-filter>
</activity>
</application>
</manifest>
<RelativeLayout
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"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:background="@drawable/logo2"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".Login"
android:id="@+id/login_page">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="40sp"
android:text="@string/appname"
android:id="@+id/login"
android:textColorHighlight="#1a04ff"
android:textColorHint="#1f08ff"
android:textColorLink="#120aff"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:textColor="#010101" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="LOGIN"
android:id="@+id/button"
android:theme="@android:style/MediaButton"
android:textSize="25sp"
android:layout_above="@+id/button_signup"
android:layout_centerHorizontal="true" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:ems="10"
android:id="@+id/editText"
android:layout_marginBottom="114dp"
android:layout_above="@+id/button"
android:layout_alignLeft="@+id/editText2"
android:layout_alignStart="@+id/editText2"
android:layout_marginRight="40dp"
/>
<EditText
android:id="@+id/editText2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textEmailAddress"
android:ems="10"
android:layout_marginBottom="20dp"
android:textColor="@color/abc_search_url_text_normal"
android:layout_above="@+id/editText"
android:layout_alignLeft="@+id/login"
android:layout_alignStart="@+id/login"
android:layout_marginLeft="27dp"
android:layout_marginStart="27dp"
android:layout_marginRight="40dp"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="User id"
android:id="@+id/textView"
android:paddingRight="16dp"
android:layout_alignBottom="@+id/editText2"
android:layout_toLeftOf="@+id/editText"
android:layout_toStartOf="@+id/editText"
android:textColor="#3288ff" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Password"
android:id="@+id/textView2"
android:layout_alignBottom="@+id/editText"
android:layout_alignLeft="@+id/textView"
android:layout_alignStart="@+id/textView"
android:paddingRight="16dp"
android:textColor="#3288ff" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Sign Up"
android:id="@+id/button_signup"
android:textSize="19sp"
android:theme="@android:style/MediaButton"
android:layout_marginBottom="45dp"
android:layout_alignParentBottom="true"
android:layout_alignLeft="@+id/button"
android:layout_alignStart="@+id/button" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Show Database"
android:id="@+id/button3"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:textSize="10sp"
/>
/>
plz help _/\ _並且我認爲錯誤必須在數據庫幫助程序類或登錄類中 –
1-技術上，異常是響應。 2 - 請創建一個[MCVE]（http://stackoverflow.com/help/mcve），沒有人想要閱讀這種類型的代碼。 –