RuntimeException-原因：android.database.sqlite.SQLiteException：无此类表：tbl（代码1）

Question

我的数据库有一个名为“ tbl”的表，但错误提示：未找到表“ tbl”]]

DataBase.java =>如以下所示

public class DataBase extends SQLiteOpenHelper {
    private Context context;

    public DataBase(@Nullable Context context) {
        super(context, info_db.Data_Name, null, info_db.DataBase_Version);
        this.context = context;
        IsDatabase();
    }

    @Override
    public void onCreate(SQLiteDatabase db) {

    }

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

    }

    private void IsDatabase() {
        File check = new File(info_db.Package);
        if (!check.exists()) {
            check.mkdir();
        }
        check = context.getDatabasePath(info_db.Data_Name);
        if (!check.exists()) {
            try {
                copyDataBase();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    private void copyDataBase() throws IOException {
        InputStream myInput = context.getAssets().open(info_db.DataBase_Source);
        String outFileName = info_db.Package + info_db.DataBase_Name;

        OutputStream myOutput = new FileOutputStream(outFileName);
        byte[] buffer = new byte[1024];
        int length;
        while ((length = myInput.read(buffer)) > 0) {
            myOutput.write(buffer, 0, length);
        }
        myOutput.flush();
        myOutput.close();
        myInput.close();
    }

    public List<info_Data> fetchmaindata() {
        SQLiteDatabase db = this.getReadableDatabase();
        List<info_Data> data = new ArrayList<>();

        String query ="SELECT "+info_db.Data_Name+","+info_db.Data_Body+","+info_db.Data_Fav+","+info_db.Data_Image+" FROM "+info_db.Table_Name;

        Cursor cursor = db.rawQuery(query,null);
        if (cursor.moveToFirst()){
            do {
                info_Data info = new info_Data();
                info.setName(cursor.getString(cursor.getColumnIndex(info_db.Data_Name)));
                info.setBody(cursor.getString(cursor.getColumnIndex(info_db.Data_Body)));
                info.setFav(cursor.getInt(cursor.getColumnIndex(info_db.Data_Fav)));
                info.setImage(cursor.getString(cursor.getColumnIndex(info_db.Data_Image)));
                data.add(info);

            }while (cursor.moveToNext());
        }
        cursor.close();
        db.close();

        return data;
    }
}
FragMain.java =>作为波纹管

public class FragMain extends Fragment {


    public FragMain() {
        // Required empty public constructor
    }

    private RecyclerView recyclerView;
    private AdapterMain adapter;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        DataBase db = new DataBase(getActivity());
        List<info_Data> data = db.fetchmaindata();
        db.close();

        View view = inflater.inflate(R.layout.fragment_frag_main, container, false);
        recyclerView = (RecyclerView) view.findViewById(R.id.main_re);


        adapter = new AdapterMain(getActivity(), postdata(data));
        recyclerView.setAdapter(adapter);
        recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));

        return view;
    }

    private List<info> postdata(List<info_Data> db) {

        List<info> data = new ArrayList<>();
        //String name[] = {"بخش هشتم", "بخش هفتم", "بخش ششم", "بخش پنجم", "بخش چهارم", "بخش سوم", "بخش دوم"};
        //int pic[] = {R.drawable.img, R.drawable.img, R.drawable.img, R.drawable.img, R.drawable.img, R.drawable.img, R.drawable.img};
        for (int i = 0; i < db.size(); i++) {
            info cur = new info();
            cur.title = db.get(i).getName();
            String uri ="@drawable/"+db.get(i).getImage();
            int iconid = getResources().getIdentifier(uri, null, getActivity().getPackageName());
            cur.iconid = iconid;
            cur.body = db.get(i).getBody();
            data.add(cur);
        }

        return data;
    }

}
和logcat中的错误=>如下所示

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.af.sawalebast/com.af.sawalebast.MainActivity}: android.view.InflateException: Binary XML file line #26: Error inflating class fragment
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2327)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2392)
    at android.app.ActivityThread.access$800(ActivityThread.java:153)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1305)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:135)
    at android.app.ActivityThread.main(ActivityThread.java:5293)
    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:903)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
 Caused by: android.view.InflateException: Binary XML file line #26: Error inflating class fragment
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:763)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:809)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:809)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
    at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:555)
    at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:161)
    at com.af.sawalebast.MainActivity.onCreate(MainActivity.java:19)
    at android.app.Activity.performCreate(Activity.java:5990)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2280)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2392) 
    at android.app.ActivityThread.access$800(ActivityThread.java:153) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1305) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:135) 
    at android.app.ActivityThread.main(ActivityThread.java:5293) 
    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:903) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) 
 Caused by: android.database.sqlite.SQLiteException: no such table: tbl (code 1): , while compiling: SELECT name,body,fav,image FROM tbl
    at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
    at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:889)
    at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:500)
    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:44)
    at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1316)
    at android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1255)
    **at com.af.sawalebast.DataBase.fetchmaindata(DataBase.java:74)
    at com.af.sawalebast.FragMain.onCreateView(FragMain.java:33)**
    at androidx.fragment.app.Fragment.performCreateView(Fragment.java:2600)
    at androidx.fragment.app.FragmentManagerImpl.ensureInflatedFragmentView(FragmentManagerImpl.java:1138)
    at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManagerImpl.java:851)
    at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManagerImpl.java:1133)
    at androidx.fragment.app.FragmentManagerImpl.addFragment(FragmentManagerImpl.java:1393)
    at androidx.fragment.app.FragmentManagerImpl.onCreateView(FragmentManagerImpl.java:3205)
    at androidx.fragment.app.FragmentController.onCreateView(FragmentController.java:134)
    at androidx.fragment.app.FragmentActivity.dispatchFragmentsOnCreateView(FragmentActivity.java:357)
    at androidx.fragment.app.FragmentActivity.onCreateView(FragmentActivity.java:336)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:733)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:806) 
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:809) 
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:809) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:504) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:414) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:365) 
    at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:555) 
    at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:161) 
    at com.af.sawalebast.MainActivity.onCreate(MainActivity.java:19) 
    at android.app.Activity.performCreate(Activity.java:5990) 
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106) 
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2280) 
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2392) 
    at android.app.ActivityThread.access$800(ActivityThread.java:153) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1305) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:135) 
    at android.app.ActivityThread.main(ActivityThread.java:5293) 
    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:903) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) 
感谢所有人

我的数据库有一个名为“ tbl”的表，但错误提示：未找到表“ tbl” DataBase.java =>由于下面的公共类DataBase扩展了SQLiteOpenHelper {private Context context;公共...

Answer 1

最可能的原因是复制到资产中的数据库文件没有这样的表。