leider sqlite hat aufgehört

Question

Ich habe gerade mit Android begonnen und ich versuche, eine Anmeldeseite zu machen und die Eingabedaten in einer SQLite-Datenbank zu speichern, aber ich bekomme diesen Fehler beim Kompilieren auf meinem Handy. "leider sqlite hat aufgehört";

Anmeldungsklasse Paket com.example.asus.sqlite;

import android.content.Intent; 
import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.view.View; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.TextView; 
import android.widget.Toast; 

public class Signup extends AppCompatActivity { 
    private EditText userinput ; 
    private EditText passin; 
    private EditText reppassin; 
    private EditText emailin; 
    private EditText phonenum; 
    private Button signup; 
    public static String user  = ""; 
    public static String pass  = ""; 
    public static String reppass = ""; 
    public static String phonen = ""; 
    public static String mail  = ""; 


    UserInfo submit = new UserInfo(); 
    final DatabaseHandler handler = new DatabaseHandler(this); 

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



     userinput = (EditText) findViewById(R.id.userin); 
     passin = (EditText) findViewById(R.id.pass1in); 
     reppassin = (EditText) findViewById(R.id.pass2in); 
     emailin = (EditText) findViewById(R.id.emailin); 
     phonenum = (EditText) findViewById(R.id.phonein); 
     signup = (Button) findViewById(R.id.signupbutt); 
     signup.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       user = userinput.getText().toString().trim(); 
       pass = passin.getText().toString().trim(); 
       reppass = reppassin.getText().toString().trim(); 
       phonen = phonenum.getText().toString().trim(); 
       mail = emailin.getText().toString().trim(); 

       if(pass.equals("") || user.equals("") || reppass.equals("") || phonen.equals("") || mail.equals("") ) { 
        Toast.makeText(getApplicationContext(), "make sure to fill all the informations", Toast.LENGTH_LONG).show(); 

       } else if(!pass.equals(reppass)) { 
        Toast.makeText(getApplicationContext(), "password does not match", Toast.LENGTH_LONG).show(); 

       } else { 
        submit.setUsername(user); 
        submit.setPassword(pass); 
        submit.setEmail(mail); 
        submit.setPhone(phonen); 

        handler.addUser(submit); 
        Intent redirect = new Intent(getApplicationContext(),Signin.class); 
        startActivity(redirect); 
       } 


      } 
     }); 




    } 



} 

databse Klasse

Paket com.example.asus.sqlite;

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

/** 
* Created by ASUS on 6/25/2017. 
*/ 

public class DatabaseHandler extends SQLiteOpenHelper { 
    public static final int DATABASE_VERSION = 1 ; 
    public static final String DATABASE_NAME = "sqliteApp.db" ; 
    public static final String TABLE_NAME = "user_infos"; 
    public static final String ID = "ID"; 
    public static final String USERNAME = "username"; 
    public static final String PASSWORD = "password"; 
    public static final String EMAIL = "Email"; 
    public static final String PHONE = "phonenum"; 




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

    @Override 
    public void onCreate(SQLiteDatabase db) { 
     String CREATE_CONTACTS_TABLE = "CREATE TABLE " + DATABASE_NAME + "(" 
       + ID + " INTEGER PRIMARY KEY," + USERNAME + " TEXT, " 
       + PASSWORD + " TEXT, " 
       + EMAIL + " TEXT, " 
       + PHONE + " TEXT" + ")"; 
     db.execSQL(CREATE_CONTACTS_TABLE); 
    } 

    @Override 
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 

     db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME); 

     onCreate(db); 


    } 

    public void addUser(UserInfo submit) { 
     SQLiteDatabase db = this.getWritableDatabase(); 

     ContentValues values = new ContentValues(); 
     values.put(USERNAME, submit.getUsername()); // Contact Name 
     values.put(PASSWORD, submit.getPassword()); // Contact password 
     values.put(EMAIL, submit.getEmail()); // Contact password 
     values.put(PHONE, submit.getPhone()); // Contact password 

     // Inserting Row 
     db.insert(TABLE_NAME, null, values); 
     db.close(); // Closing database connection 
    } 


    // Getting single contact 
    public UserInfo getUser(String userName , String password) { 
     SQLiteDatabase db = this.getReadableDatabase(); 

     Cursor cursor = db.query(DATABASE_NAME, new String[] { 
         USERNAME, PASSWORD }, USERNAME + "=?" + " AND " + PASSWORD + "=?", 
       new String[] { String.valueOf(userName) , String.valueOf(password) }, null, null, null); 
     if (cursor != null) 
      cursor.moveToFirst(); 

     UserInfo user = new UserInfo (cursor.getString(0), 
       cursor.getString(1),"",""); 
     // return contact 
     return user; 
    } 




} 

dies der Fehler logcat ist, dass Sie eine Aktivität in manifest.xml Datei nicht definieren (Datenbank erweitert AppCompatActivity)

06-27 15:34:01.060 10546-10546/com.example.asus.sqlite E/AndroidRuntime: FATAL EXCEPTION: main 
                     Process: com.example.asus.sqlite, PID: 10546 
                     java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.asus.sqlite/com.example.asus.sqlite.MainActivity}: android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.asus.sqlite/com.example.asus.sqlite.Signin}; have you declared this activity in your AndroidManifest.xml? 
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2697) 
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2771) 
                      at android.app.ActivityThread.access$900(ActivityThread.java:177) 
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1432) 
                      at android.os.Handler.dispatchMessage(Handler.java:102) 
                      at android.os.Looper.loop(Looper.java:135) 
                      at android.app.ActivityThread.main(ActivityThread.java:5912) 
                      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:1405) 
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1200) 
                      Caused by: android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.asus.sqlite/com.example.asus.sqlite.Signin}; have you declared this activity in your AndroidManifest.xml? 
                      at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1791) 
                      at android.app.Instrumentation.execStartActivity(Instrumentation.java:1513) 
                      at android.app.Activity.startActivityForResult(Activity.java:3940) 
                      at android.support.v4.app.BaseFragmentActivityJB.startActivityForResult(BaseFragmentActivityJB.java:50) 
                      at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:79) 
                      at android.app.Activity.startActivityForResult(Activity.java:3888) 
                      at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:859) 
                      at android.app.Activity.startActivity(Activity.java:4211) 
                      at android.app.Activity.startActivity(Activity.java:4179) 
                      at com.example.asus.sqlite.MainActivity.onCreate(MainActivity.java:20) 
                      at android.app.Activity.performCreate(Activity.java:6185) 
                      at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118) 
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2650) 
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2771)  
                      at android.app.ActivityThread.access$900(ActivityThread.java:177)  
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1432)  
                      at android.os.Handler.dispatchMessage(Handler.java:102)  
                      at android.os.Looper.loop(Looper.java:135)  
                      at android.app.ActivityThread.main(ActivityThread.java:5912)  
                      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:1405)  
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1200 

Answer 1

Das eigentliche Problem ist. Okay, selbst wenn Sie es tun, erhalten Sie eine Fehlermeldung. Bitte teilen Sie uns mit, warum Ihre db-Klasse die Aktivität verlängert.

Answer 2

Aufgrund Ihres Logcat-Fehlers müssen Sie die Anmeldeaktivität in Ihre Android-Manifestdatei aufnehmen.