2012-12-19 62 views
8

代碼沒有給出這樣的表異常。我讀了關於這個例外的幾乎所有問題 ,完成了它所說的一切。但仍然無效。 我找不到問題所在。有沒有人可以幫助我?編譯時出現Android SQLiteException「no such table」:INSERT INTO表

public class Butcegiris extends Activity { 
    EditText bakici, krediAraba, krediOgrenim, krediTatil, faturaElektrik; 
    EditText faturaSu, faturaInternet, aidat, kaskoSigorta; 
    Spinner yillar,aylar; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.butcegiris); 

     bakici = (EditText) findViewById(R.id.editTextBakici); 
     krediAraba = (EditText) findViewById(R.id.editTextKrediAraba); 
     krediOgrenim = (EditText) findViewById(R.id.editTextOgrenimKredisi); 
     krediTatil = (EditText) findViewById(R.id.editTextTatilKredisi); 
     faturaElektrik = (EditText) findViewById(R.id.editTextFaturaElektrik); 
     faturaSu = (EditText) findViewById(R.id.editTextFaturaSu); 
     faturaInternet = (EditText) findViewById(R.id.editTextFaturaInternet); 
     aidat = (EditText) findViewById(R.id.editTextAidat); 
     kaskoSigorta = (EditText) findViewById(R.id.editTextKaskoSigorta); 
     yillar=(Spinner)findViewById(R.id.spinnerYillar); 
     aylar=(Spinner)findViewById(R.id.spinnerAylar); 

     Button ileri = (Button) findViewById(R.id.buttonIleri); 
     ileri.setOnClickListener(new View.OnClickListener() { 

      public void onClick(View v) { 

       boolean didItWork=true; 
       try { 
        int bakicisql = Integer.valueOf(bakici.getText().toString()); 
        int krediArabasql = Integer.valueOf(krediAraba.getText() 
          .toString()); 
        int krediOgrenimsql = Integer.valueOf(krediOgrenim.getText() 
          .toString()); 
        int krediTatilsql = Integer.valueOf(krediTatil.getText() 
          .toString()); 
        int faturaElektriksql = Integer.valueOf(faturaElektrik 
          .getText().toString()); 
        int faturaSusql = Integer 
          .valueOf(faturaSu.getText().toString()); 
        int faturaInternetsql = Integer.valueOf(faturaInternet 
          .getText().toString()); 
        int aidatsql = Integer.valueOf(aidat.getText().toString()); 
        int kaskoSigortasql = Integer.valueOf(kaskoSigorta.getText() 
          .toString()); 
        String yil=yillar.getSelectedItem().toString(); 
        String ay= aylar.getSelectedItem().toString(); 


        TemporaryDatabase entry = new TemporaryDatabase(Butcegiris.this); 

        entry.open(); 

        entry.createEntryGiris(yil,ay,bakicisql, krediArabasql, krediOgrenimsql, 
          krediTatilsql, faturaElektriksql, faturaSusql, 
          faturaInternetsql, aidatsql, kaskoSigortasql); 

        entry.close(); 
        Intent intent = new Intent(Butcegiris.this, Butcehesapla.class); 
        startActivity(intent); 
       } catch (NumberFormatException e) { 
        didItWork=false; 
       } finally { 

        if(didItWork){ 

         Toast.makeText(Butcegiris.this,"Success", Toast.LENGTH_LONG).show(); 

        } 

       } 

      } 
     }); 
    } 

    protected void onPause() { 

     super.onPause(); 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     getMenuInflater().inflate(R.menu.butcegiris_xml, menu); 
     return true; 
    } 

    public boolean onOptionsItemSelected(MenuItem item) { 

     switch (item.getItemId()) { 

     case R.id.ikinciSayfa: 

      Intent intent = new Intent(Butcegiris.this, Butcehesapla.class); 
      startActivity(intent); 
      return true; 

     } 
     return false; 
    } 
} 

TemporaryDatabase類

public class TemporaryDatabase 

{ 

    public static final String TAG = DbHelperTemporary.class.getSimpleName(); 
    public static final String DB_NAME = "butcedb.sql"; 
    private static String DB_PATH = "/data/data/com.deitel.btc/assets/"; 
    public static final int DB_VERSION = 2; 
    public static final String DB_TABLE = "harcamalar"; 

    public static final String C_ID = BaseColumns._ID;// Special for id 
    public static final String C_YIL = "spinnerYillar"; 
    public static final String C_AY = "spinnerAylar"; 
    public static final String C_BAKICI = "editTextBakici"; 
    public static final String C_KREDIARABA = "editTextKrediAraba"; 
    public static final String C_KREDIOGRENIM = "editTextKrediOgrenim"; 
    public static final String C_KREDITATIL = "editTextKrediTatil"; 
    public static final String C_FATURAELEKTRIK = "editTextFaturaElektrik"; 
    public static final String C_FATURASU = "editTextFaturaSu"; 
    public static final String C_FATURAINTERNET = "editTextFaturaInternet"; 
    public static final String C_AIDAT = "editTextAidat"; 
    public static final String C_KASKOSIGORTA = "editTextKaskoSigorta"; 

    public static final String C_DIGERTAKSITLER = "editTextDigerTaksitler"; 
    public static final String C_DIGER = "editTextDiger"; 
    public static final String C_MAASSELO = "editTextMaasSelo"; 
    public static final String C_MAASHILAL = "editTextMaasHilal"; 
    public static final String C_DIGERGELIRLER = "editTextDigerGelirler"; 
    public static final String C_TOPLAMHARCAMA = "editTextToplamHarcama"; 
    public static final String C_TOPLAMGELIR = "editTextToplamGelir"; 
    public static final String C_ELDEKALAN = "editTextEldeKalan"; 

    public static final String CREATE_TABLE="CREATE TABLE ıf not exists harcamalar (C_ID int primary key autoincrement," + 
      "C_YIL int,C_AY TEXT,C_BAKICI int,C_KREDIARABA int,C_KREDIOGRENIM int,C_KREDITATIL int," + 
      "C_FATURAELEKTRIK int,C_FATURASU int,C_FATURAINTERNET int,C_AIDAT int,C_KASKOSIGORTA int," + 
      "C_DIGERTAKSITLER int,C_DIGER int,C_MAASSELO int,C_MAASHILAL int,C_DIGERGELIRLER int," + 
      "C_TOPLAMHARCAMA int,C_TOPLAMGELIR int, C_ELDEKALAN int);"; 


    private DbHelperTemporary dbHelper; 
    private final Context ourContext; 
    private SQLiteDatabase ourDatabase; 

    private static class DbHelperTemporary extends SQLiteOpenHelper { 


     public DbHelperTemporary(Context context) { 

      super(context, DB_NAME, null, DB_VERSION); 


     } 

     @Override 
     public void onCreate(SQLiteDatabase db) { 

      try { 

       Log.d(TAG, "onCreate sql: " + CREATE_TABLE); 
       db.execSQL(CREATE_TABLE); 
      } catch (SQLException e) { 

       e.printStackTrace(); 
      } 
     } 

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

      db.execSQL("drop table if exists " + DB_TABLE); 
      Log.w(TAG, "onUpdate drop table " + DB_TABLE); 
      onCreate(db); 
     } 

    } 

    public TemporaryDatabase(Context c) { 
     ourContext = c; 

    } 
    public void openDatabase() throws SQLException { 
     ourDatabase = SQLiteDatabase.openDatabase(DB_PATH + DB_NAME, null, 
       SQLiteDatabase.OPEN_READWRITE); 
    } 

    public void open() throws NumberFormatException { 

     try { 
      dbHelper = new DbHelperTemporary(ourContext); 
      ourDatabase = dbHelper.getWritableDatabase(); 
      return ; 
     } catch (Exception e) { 
      Log.d(TAG,"Couldn't open database"+DB_NAME); 
      e.printStackTrace(); 
     } 
    } 

    public void close() { 

     dbHelper.close(); 
     ourDatabase.close(); 
    } 

    public long createEntryGiris(String yilsql, String aysql, int bakicisql, 
      int krediArabasql, int krediOgrenimsql, int krediTatilsql, 
      int faturaElektriksql, int faturaSusql, int faturaInternetsql, 
      int aidatsql, int kaskoSigortasql) { 

     ContentValues cv = new ContentValues(); 
     cv.put(C_YIL, yilsql); 
     cv.put(C_AY, aysql); 
     cv.put(C_BAKICI, bakicisql); 
     cv.put(C_KREDIARABA, krediArabasql); 
     cv.put(C_KREDIOGRENIM, krediOgrenimsql); 
     cv.put(C_KREDITATIL, krediTatilsql); 
     cv.put(C_FATURAELEKTRIK, faturaElektriksql); 
     cv.put(C_FATURASU, faturaSusql); 
     cv.put(C_FATURAINTERNET, faturaInternetsql); 
     cv.put(C_AIDAT, aidatsql); 
     cv.put(C_KASKOSIGORTA, kaskoSigortasql); 

     return ourDatabase.insert(DB_TABLE, null, cv); 
    } 

    public String[] getData() { 

     String[] columns = new String[] { C_YIL, C_AY, C_BAKICI, C_KREDIARABA, 
       C_KREDIOGRENIM, C_KREDITATIL, C_FATURAELEKTRIK, C_FATURASU, 
       C_FATURAINTERNET, C_AIDAT, C_KASKOSIGORTA }; 
     Cursor c = ourDatabase.query(DB_TABLE, columns, null, null, null, null, 
       null); 
     String[] result = new String[10]; 

     //int i_yil = c.getColumnIndex(C_YIL); 
     //int i_ay = c.getColumnIndex(C_AY); 
     int i_bakici = c.getColumnIndex(C_BAKICI); 
     int i_krediaraba = c.getColumnIndex(C_KREDIARABA); 
     int i_krediogrenim = c.getColumnIndex(C_KREDIOGRENIM); 
     int i_kreditatil = c.getColumnIndex(C_KREDITATIL); 
     int i_faturaelektrik = c.getColumnIndex(C_FATURAELEKTRIK); 
     int i_faturasu = c.getColumnIndex(C_FATURASU); 
     int i_faturainternet = c.getColumnIndex(C_FATURAINTERNET); 
     int i_aidat = c.getColumnIndex(C_AIDAT); 
     int i_kaskosigorta = c.getColumnIndex(C_KASKOSIGORTA); 

     if (c.moveToLast()) { 
      result[0]=c.getString(i_bakici); 
      result[1]=c.getString(i_krediaraba); 
      result[2]=c.getString(i_krediogrenim); 
      result[3]=c.getString(i_kreditatil); 
      result[4]=c.getString(i_faturaelektrik); 
      result[5]=c.getString(i_faturasu); 
      result[6]=c.getString(i_faturainternet); 
      result[7]=c.getString(i_aidat); 
      result[8]=c.getString(i_kaskosigorta); 


      /*result = c.getString(i_bakici) + " " + c.getString(i_krediaraba) 
        + " " + c.getString(i_krediogrenim) + " "+ c.getString(i_kreditatil) + " "+ c.getString(i_faturaelektrik) + " " 
        + c.getString(i_faturasu) + " "+ c.getString(i_faturainternet) + " " 
        + c.getString(i_aidat) + " " + c.getString(i_kaskosigorta);*/ 
     } 

     return result; 
    } 

} 

這裏是xml文件

<?xml version="1.0" encoding="utf-8"?> 
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" > 
<TableRow 
      android:id="@+id/tableRow1" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" > 
      <TextView 
       android:id="@+id/textButtonBakici" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_weight="1" 
       android:text="@string/textBakici" 
       android:textAppearance="?android:attr/textAppearanceSmall" /> 
      <EditText 
       android:id="@+id/editTextBakici" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_span="3" 
       android:layout_weight="1" 
       android:hint="@string/altiyuzyirmibes" 
       android:inputType="numberDecimal" /> 

     </TableRow> 

     <TableRow 
      android:id="@+id/tableRow2" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" > 
      <TextView 
       android:id="@+id/textKrediAraba" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_weight="1" 
       android:text="@string/textKrediAraba" 
       android:textAppearance="?android:attr/textAppearanceSmall" /> 


      <EditText 
       android:id="@+id/editTextKrediAraba" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_span="3" 
       android:layout_weight="1" 
       android:hint="@string/besyuzdoksan" 
       android:inputType="numberDecimal" /> 

     </TableRow> 

     <TableRow 
      android:id="@+id/tableRow3" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" > 
      <TextView 
       android:id="@+id/textOgrenimKredisi" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_weight="1" 
       android:text="@string/textOgrenimKredisi" 
       android:textAppearance="?android:attr/textAppearanceSmall" /> 


      <EditText 
       android:id="@+id/editTextOgrenimKredisi" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_span="3" 
       android:layout_weight="1" 
       android:hint="@string/dortyuzon" 
       android:inputType="numberDecimal" /> 

     </TableRow> 

     <TableRow 
      android:id="@+id/tableRow4" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" > 
      <TextView 
       android:id="@+id/textTatilKredisi" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_weight="1" 
       android:text="@string/textTatilKredisi" 
       android:textAppearance="?android:attr/textAppearanceSmall" /> 



      <EditText 
       android:id="@+id/editTextTatilKredisi" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_span="3" 
       android:layout_weight="1" 
       android:hint="@string/yuzotuzbes" 
       android:inputType="numberDecimal" /> 

     </TableRow> 

     <TableRow 
      android:id="@+id/tableRow5" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" > 
      <TextView 
       android:id="@+id/textFaturaElektrik" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_weight="1" 
       android:text="@string/textFaturaElektrik" 
       android:textAppearance="?android:attr/textAppearanceSmall" /> 

      <EditText 
       android:id="@+id/editTextFaturaElektrik" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_span="3" 
       android:layout_weight="1" 
       android:hint="@string/sifir" 
       android:inputType="numberDecimal" /> 

     </TableRow> 

     <TableRow 
      android:id="@+id/tableRow6" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" > 
      <TextView 
       android:id="@+id/textFaturaSu" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_weight="1" 
       android:text="@string/textFaturaSu" 
       android:textAppearance="?android:attr/textAppearanceSmall" /> 

      <EditText 
       android:id="@+id/editTextFaturaSu" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_span="3" 
       android:layout_weight="1" 
       android:hint="@string/sifir" 
       android:inputType="numberDecimal" /> 

     </TableRow> 

     <TableRow 
      android:id="@+id/tableRow7" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" > 
      <TextView 
       android:id="@+id/textFaturaInternet" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_weight="1" 
       android:text="@string/textFaturaInternet" 
       android:textAppearance="?android:attr/textAppearanceSmall" /> 


      <EditText 
       android:id="@+id/editTextFaturaInternet" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_span="3" 
       android:layout_weight="1" 
       android:hint="@string/otuz" 
       android:inputType="numberDecimal" /> 

     </TableRow> 

     <TableRow 
      android:id="@+id/tableRow8" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" > 
      <TextView 
       android:id="@+id/textAidat" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_weight="1" 
       android:text="@string/textAidat" 
       android:textAppearance="?android:attr/textAppearanceSmall" /> 

      <EditText 
       android:id="@+id/editTextAidat" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_span="3" 
       android:layout_weight="1" 
       android:hint="@string/sifir" 
       android:inputType="numberDecimal" /> 

     </TableRow> 

     <TableRow 
      android:id="@+id/tableRow9" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content"> 
      <TextView 
       android:id="@+id/textKaskoSigorta" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_weight="1" 
       android:text="@string/textKaskoSigorta" 
       android:textAppearance="?android:attr/textAppearanceSmall" /> 



      <EditText 
       android:id="@+id/editTextKaskoSigorta" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_span="3" 
       android:layout_weight="1" 
       android:ems="10" 
       android:hint="@string/ikiyuzyirmibes" 
       android:inputType="numberDecimal" > 

       <requestFocus /> 
      </EditText> 

     </TableRow> 
     <TableRow 
      android:id="@+id/tableRow10" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" > 
     <LinearLayout 
      android:layout_width="fill_parent" 
      android:layout_height="fill_parent" 
      android:orientation="horizontal" 
      android:layout_weight="10"> 

     <Spinner 
      android:id="@+id/spinnerYillar" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_weight="3" 
      android:entries="@array/Yillar" 
      android:prompt="@string/promptYillar" /> 

     <Spinner 
      android:id="@+id/spinnerAylar" 
      android:layout_height="wrap_content" 
      android:layout_width="wrap_content" 
      android:layout_weight="3" 
      android:prompt="@string/prompt" 
      android:entries="@array/Aylar" 
      /> 
     </LinearLayout> 

     <Button 
      android:id="@+id/buttonIleri" 
      style="?android:attr/buttonStyleSmall" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:layout_gravity="right" 
      android:gravity="right" 
      android:layout_weight="0" 
      android:background="@drawable/navigation_forward" /> 

     </TableRow>  

</TableLayout> 

我知道這是很長,但我無法找到問題。 非常感謝您的幫助。

no such table: harcamalar 
Error inserting spinnerYillar=2012 editTextFaturaSu=9 editTextKrediOgrenim=9 editTextAidat=9 editTextFaturaElektrik=99 editTextKaskoSigorta=9 editTextKrediAraba=9 spinnerAylar=Ocak editTextFaturaInternet=6 editTextBakici=9 editTextKrediTatil=9 

android.database.sqlite.SQLiteException: no such table: harcamalar (code 1): , while compiling: INSERT INTO harcamalar(spinnerYillar,editTextFaturaSu,editTextKrediOgrenim,editTextAidat,editTextFaturaElektrik,editTextKaskoSigorta,editTextKrediAraba,spinnerAylar,editTextFaturaInternet,editTextBakici,editTextKrediTatil) VALUES (?,?,?,?,?,?,?,?,?,?,?) 
at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method) 
at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:882) 
at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:493) 
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.insertWithOnConflict(SQLiteDatabase.java:1467) 
at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1339) 
at com.deitel.btc.TemporaryDatabase.createEntryGiris(TemporaryDatabase.java:131) 
at com.deitel.btc.Butcegiris$1.onClick(Butcegiris.java:69) 
at android.view.View.performClick(View.java:4202) 
at android.view.View$PerformClick.run(View.java:17340) 
at android.os.Handler.handleCallback(Handler.java:725) 
at android.os.Handler.dispatchMessage(Handler.java:92) 
at android.os.Looper.loop(Looper.java:137) 
at android.app.ActivityThread.main(ActivityThread.java:5039) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:511) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
12-19 12:27:17.976: E/SQLiteDatabase(1023):  at dalvik.system.NativeStart.main(Native Method) 
+1

發佈堆棧跟蹤 –

+0

嘿傢伙,調試你的應用程序,看看它是哪裏錯誤。 – Rodolfo

+0

我看到'DB_VERSION'是2,你有最新的改變後增加了這個數字嗎? – jnthnjns

回答

2

而是在CREATE_TABLE聲明爲int,你應該使用整數

所以使用

C_ID integer primary key autoincrement 

入住這doc

引用

您必須使用 「整數」 不「INT」。類型INT PRIMARY KEY的列 無類型就像任何其他

而不是

CREATE TABLE ıf not exists harcamalar (C_ID int primary key autoincrement," + 
      "C_YIL int,C_AY TEXT,C_BAKICI int .. so on 

CREATE TABLE ıf not exists harcamalar (C_ID int primary key autoincrement," + 
      C_YIL + "int," + C_AY + "TEXT,"+ C_BAKICI +" int .. so on 

您需要添加變量的值,而不是變量名本身

+0

我試過了。但是拋出相同的異常(沒有這樣的表) – hopeTo

+0

通過捕獲異常來解決打開調用中的catch異常,這使得難以調試問題。當你打開,甚至在Oncreate時,也許有一個例外。刪除所有未經檢查的異常的處理 – nandeesh

+0

我做了你說的和這裏是最後一個日誌:E/SQLiteLog(1814):(1)表harcamalar沒有列名爲spinnerYillar – hopeTo

5

你CREATE_TABLE說法似乎並不正確。

CREATE TABLE ıf 

也許應該

CREATE TABLE if 

我一直有使用「如果不存在」早期的表現,或許你可以嘗試沒有它的問題,如果我的第一個建議不起作用嘗試縮小這個範圍。你也可以嘗試在sql語句中輸入「integer」而不是「int」。不確定速記是否合法。

+0

好的。我正在嘗試這些。 – hopeTo

+0

在您的機器上運行本地SQLite服務器以嘗試查詢可能是一個好主意。或者你可以嘗試Firefox的SQLite管理器插件,這非常有用:https://addons.mozilla.org/en-us/firefox/addon/sqlite-manager/使用它你可以嘗試你的查詢,並確保它們是正確的。 – span

+0

我試過但。再次沒有工作。仍然說「沒有這樣的桌子」。 – hopeTo

0

我有同樣的問題構建我的應用程序我嘗試了一切,沒有w orked。數據庫和表名一樣好。

引起:android.database.sqlite。SQLiteException:沒有這樣的表:(1碼)的Android

解決方案: 是解決這個問題的唯一辦法是取消安裝從仿真器應用:

1-打開模擬器,去設置 2-點擊Apps 3-滾動以找到您的應用程序名稱 4-雙擊它 5-強制停止 6-取消安裝它。

從android studio再次運行您的應用程序,並嘗試檢查數據庫連接。這對我有用,祝你好運。

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