我知道有很多关于此错误的主题，但我尝试了很多解决方案，但仍然遇到了这个错误。这是我第一次玩SQLite，而且我不明白那里发生了什么错误。我无法添加第二个Activity的数据，但是有效的活动。
我的班级
public static final String KEY_ID = "_ID";
public static final String COL_CODE_TREE = "code_tree";
public static final String COL_STATUS_HIGH = "updateStatus";
public static final String TABLE_NAME_Product = "Product";
public static final String COL_PRODUCT_ALL = "product_all";
public static final String COL_PRODUCT_BEST = "product_best";
public static final String COL_DATE_PRODUCT = "date_product";
public DatabaseCoconut(Context context) {
super(context, DB_NAME, null, DB_VERSION);
}
public void onCreate(SQLiteDatabase db) {
String query,queryProduct;
query = "CREATE TABLE High ( _Id INTEGER PRIMARY KEY, code_tree VARCHAR, high_tree INTEGER, date_high DATE, updateStatus TEXT)";
queryProduct = "CREATE TABLE Product ( _Id INTEGER PRIMARY KEY, code_tree VARCHAR, product_all INTEGER, product_best INTEGER , date_product DATE, updateStatus TEXT)";
db.execSQL(query);
db.execSQL(queryProduct);
}
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// db.execSQL("DROP TABLE IF EXISTS "+ TABLE_NAME_HIGH);
String query,queryProduct;
query = "DROP TABLE IF EXISTS High";
queryProduct = "DROP TABLE IF EXISTS Product";
db.execSQL(query);
db.execSQL(queryProduct);
onCreate(db);
}
secondActivity
public class ProductActivity extends AppCompatActivity{
public static final String BARCODE_KEY = "BARCODE";
private Barcode barcodeResult;
private EditText result;
ListView listproductshow;
DatabaseCoconut mHelper;
SQLiteDatabase mDb2;
Cursor mCursor2;
DatabaseCoconut controller = new DatabaseCoconut(this);
ProgressDialog prgDialog;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_product);
Log.d("ProductActivity", "onCreate");
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
result = (EditText) findViewById(R.id.editCodeProduct);
final EditText editall = (EditText)findViewById(R.id.editproductall);
final EditText editbest = (EditText)findViewById(R.id.editproductbest);
mHelper = new DatabaseCoconut(this);
mDb2 = mHelper.getWritableDatabase();
//Toast.makeText(getApplicationContext(), mHelper.getSyncStatus(), Toast.LENGTH_LONG).show();
Button buttonAdd = (Button)findViewById(R.id.buttonAddproduct);
buttonAdd.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
String codeproduct = result.getText().toString();
String all = editall.getText().toString();
String best = editbest.getText().toString();
String no = "no";
if(codeproduct.trim().length() != 0 && all.trim().length() != 0 && best.trim().length() != 0 ) {
Cursor mCursor = mDb2.rawQuery("SELECT * FROM " + DatabaseCoconut.TABLE_NAME_Product
+ " WHERE " + DatabaseCoconut.COL_CODE_TREE + "='" + codeproduct + "'"
+ " AND " + DatabaseCoconut.COL_PRODUCT_ALL + "='" + all + "'"
+ " AND " + DatabaseCoconut.COL_PRODUCT_BEST + "='" + best + "'"
+ " AND " + DatabaseCoconut.COL_STATUS_HIGH + "='" + no + "'"
+ " AND " + DatabaseCoconut.COL_DATE_PRODUCT + "='" + getDateTime() + "'", null);
if(mCursor.getCount() == 0) {
mDb2.execSQL("INSERT INTO "+ DatabaseCoconut.TABLE_NAME_Product
+" (" + DatabaseCoconut.COL_CODE_TREE
+ ", " + DatabaseCoconut.COL_PRODUCT_ALL
+ ", " + DatabaseCoconut.COL_PRODUCT_BEST
+ ", " + DatabaseCoconut.COL_STATUS_HIGH
+ ", " + DatabaseCoconut.COL_DATE_PRODUCT + ") VALUES ('"
+ codeproduct + "', '" + all + "', '" + best + "', '" + no + "', '" + getDateTime() + "');");
result.setText("");
editall.setText("");
editbest.setText("");
Toast.makeText(getApplicationContext()
,"เพิ่มข้อมูลเรียบร้อยแล้ว", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getApplicationContext()
,"คุณมีข้อมูลนี้อยู่แล้ว", Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(getApplicationContext()
,"กรุณากรอกข้อมูลให้ครบทุกช่อง", Toast.LENGTH_SHORT).show();
}
mCursor2 = mDb2.rawQuery("SELECT * FROM "
+ DatabaseCoconut.TABLE_NAME_Product, null);
//listproductshow = (ListView)findViewById(R.id.listhigh);
//listproductshow.setAdapter(updateListView());
}
});
private String getDateTime() {
SimpleDateFormat dateFormat = new SimpleDateFormat(
"yyyy-MM-dd ", Locale.getDefault());
Date date = new Date();
return dateFormat.format(date);
}
我的Logcat
ATAL EXCEPTION: main
Process: com.nectec.ProjectCoconut, PID: 27718
android.database.sqlite.SQLiteException: no such table: Product (Sqlite code 1): , while compiling: SELECT * FROM Product WHERE code_tree='hi' AND product_all='99' AND product_best='56' AND updateStatus='no' AND date_product='2017-04-08 ', (OS error - 2:No such file or directory)
at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:897)
at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:508)
at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:63)
at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44)
at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1344)
at android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1278)
at com.nectec.ProjectCoconut.ProductActivity$1.onClick(ProductActivity.java:90)
at android.view.View.performClick(View.java:5264)
at android.view.View$PerformClick.run(View.java:21297)
at android.os.Handler.handleCallback(Handler.java:743)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:150)
at android.app.ActivityThread.main(ActivityThread.java:5546)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:794)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:684)
答案 0 :(得分：0)
您可能是第一次执行代码而无需在 onCreate（SQLiteDatabase db）方法中创建“Product”表。当您在第二次运行具有相同数据库版本号的代码时，它不会更新它并告诉您该表不存在。只需手动卸载应用程序或删除数据即可使用相同版本 DB_VERSION 强制重建数据库。