SQLiteException：沒有找到這樣的表，而創建了一個表

Question

在這個應用程序中，我有兩個activities一個用於發送location的用戶和其他用於顯示listView其中每行包含一個名稱和一個電話號碼。 listView條目存儲在sqlitedatabse中。這conatins的listView的activity輸入姓名和電話號碼，但conatins按鈕，發送location存儲在sqlitedatabse的號碼activity時顯示錯誤

android.database.sqlite.SQLiteException沒有顯示錯誤：沒有這樣的表：UserDataB（碼1）：在編譯：SELECT * FROM UserDataB

UserDataB哪裏是table name。我檢查了這個link，因爲這個錯誤與我的錯誤類似，但它並沒有幫助我解決問題。

UserDataBase

對於其中location被髮送到條目sqlitedatabse的activity的代碼如下給出：：下面的代碼中給出

活動

public class Gps4Activity extends AppCompatActivity implements 
     GoogleApiClient.OnConnectionFailedListener { 

    private static final String LOG_TAG = "PlacesAPIActivity"; 
    private static final int GOOGLE_API_CLIENT_ID = 0; 
    private GoogleApiClient mGoogleApiClient; 
    private static final int PERMISSION_REQUEST_CODE = 100; 
    private static final int MY_PERMISSIONS_REQUEST_SEND_SMS =0 ; 
    private TextView display; 
    private Button location_button,contacts_button; 
    //String number="xxxxxxxxxx"; 

    ArrayList<String> numbers; 
    SQLiteDatabase db; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_gps4); 

     numbers=new ArrayList<>(); 
     db=Gps4Activity.this.openOrCreateDatabase("User_Details",MODE_PRIVATE,null); 


     location_button=(Button)findViewById(R.id.show_button); 
     contacts_button=(Button)findViewById(R.id.view_button); 
     display=(TextView)findViewById(R.id.location_textview); 

     mGoogleApiClient = new GoogleApiClient.Builder(Gps4Activity.this) 
       .addApi(Places.PLACE_DETECTION_API) 
       .enableAutoManage(this, GOOGLE_API_CLIENT_ID, this) 
       .build(); 

     location_button.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       if (mGoogleApiClient.isConnected()) { 
        if (ActivityCompat.checkSelfPermission(Gps4Activity.this, 
          android.Manifest.permission.ACCESS_FINE_LOCATION) 
          != PackageManager.PERMISSION_GRANTED) { 
         ActivityCompat.requestPermissions(Gps4Activity.this, 
           new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION}, 
           PERMISSION_REQUEST_CODE); 
         ActivityCompat.requestPermissions(Gps4Activity.this, 
           new String[]{Manifest.permission.SEND_SMS}, 
           MY_PERMISSIONS_REQUEST_SEND_SMS); 
        } 
       } 
       callPlaceDetectionApi(); 
      } 
     }); 

     contacts_button.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Intent intent=new Intent(Gps4Activity.this,DetailsActivity.class); 
       startActivity(intent); 
      } 
     }); 
    } 




    public ArrayList<String> getContacts(){ 

     Cursor cursor=db.rawQuery("SELECT * FROM "+UserDatabase.TABLE_NAME,null); 
     db.execSQL("create table " + UserDatabase.TABLE_NAME + "(" + UserDatabase._ID 
       + " INTEGER PRIMARY KEY AUTOINCREMENT, " + UserDatabase.NAME + " TEXT NOT NULL, " + 
       UserDatabase.NUMBER + " TEXT);"); 

     while (cursor.moveToNext()){ 
      String contact=cursor.getString(cursor.getColumnIndex(UserDatabase.NUMBER)); 
      numbers.add(contact); 
     } 
     return numbers; 
    } 




    @Override 
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) { 
     Log.e(LOG_TAG, "Google Places API connection failed with error code: " 
       + connectionResult.getErrorCode()); 

     Toast.makeText(this, 
       "Google Places API connection failed with error code:" + 
         connectionResult.getErrorCode(), 
       Toast.LENGTH_LONG).show(); 
    } 

    @Override 
    public void onRequestPermissionsResult(int requestCode, 
              String permissions[], int[] grantResults) { 
     switch (requestCode) { 
      case PERMISSION_REQUEST_CODE: 
       if (grantResults.length > 0 
         && grantResults[0] == PackageManager.PERMISSION_GRANTED) { 
        callPlaceDetectionApi(); 
       } else { 
        Toast.makeText(getApplicationContext(), 
          "SMS faild, please try again.", Toast.LENGTH_LONG).show(); 
        return; 
       } 
       break; 

     } 
    } 


    private void callPlaceDetectionApi() throws SecurityException { 
     PendingResult<PlaceLikelihoodBuffer> result = Places.PlaceDetectionApi 
       .getCurrentPlace(mGoogleApiClient, null); 
     result.setResultCallback(new ResultCallback<PlaceLikelihoodBuffer>() { 
      @Override 
      public void onResult(PlaceLikelihoodBuffer likelyPlaces) { 
       for (PlaceLikelihood placeLikelihood : likelyPlaces) { 
        Log.i(LOG_TAG, String.format("Place '%s' with " + 
            "likelihood: %g", 
          placeLikelihood.getPlace().getName(), 
          placeLikelihood.getLikelihood())); 
        display.setText(placeLikelihood.getPlace().getAddress().toString()); 
        messageSending(placeLikelihood.getPlace().getAddress().toString()); 
        break; 
       } 
       likelyPlaces.release(); 

      } 
     }); 
    } 

    public void messageSending(String message){ 
     SmsManager smsManager = SmsManager.getDefault(); 
//  smsManager.sendTextMessage(number, null, message, null, null); 
     getContacts(); 
     smsManager.sendTextMessage(String.valueOf(numbers),null,message,null,null); 
     Toast.makeText(getApplicationContext(), "SMS sent."+String.valueOf(numbers), 
       Toast.LENGTH_LONG).show(); 
    } 


} 

Answer 1

您正在對兩個不同的數據庫文件User_Details和User_Details.DB進行操作。

如果您使用SQLiteOpenHelper來管理數據庫，請一致使用它。例如，一些替代

db=Gps4Activity.this.openOrCreateDatabase("User_Details",MODE_PRIVATE,null); 

像

db = new UserDatabase(this).getReadableDatabase(); 

實際使用助手創建數據庫和表給你，並刪除CREATE TABLE代碼，是不是在助手。