问题在sqlitedatabase和数据显示为cardview

-1

当我点击显示联系人按钮第一次接触显示和下一个联系人无法显示它显示异常我怎么能解决这个异常任何人可以解决这个错误与ur briliance它显示错误opeNDatabase方法？问题在sqlitedatabase和数据显示为cardview

public class ShowContacts extends Activity 
{ 
private SQLiteDatabase db; 
DbOperations doo; 
private List<Contacts> contactsList; 
private RecyclerView rv; 
private Cursor c; 
String names,email,address; 
int phone; 
String read_query = "select * from "+ ContactsTask.ContactsEntry.TABLE_NAME; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.recycle_layout); 
    doo = new DbOperations(this); 
    openDatabase(); 
    rv = (RecyclerView)findViewById(R.id.recyclerview); 
    initializeData(); 
    LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this); 
    rv.setLayoutManager(linearLayoutManager); 
    rv.setHasFixedSize(true); 
    ContactAdapter cc = new ContactAdapter(contactsList); 
    rv.setAdapter(cc); 
} 
public void initializeData() { 
    try { 
     contactsList = new ArrayList<>(); 
     try { 
      db = doo.getReadableDatabase(); 
      c = db.rawQuery(read_query, null); 
      c.moveToFirst(); 
      while (!c.isLast()) { 
       names = c.getString(0); 
       phone = c.getInt(1); 
       email = c.getString(2); 
       address = c.getString(3); 
       contactsList.add(new Contacts(names, phone, email, address)); 
      } 
      c.isLast(); 
      names = c.getString(0); 
      phone = c.getInt(1); 
      email = c.getString(2); 
      address = c.getString(3); 
      contactsList.add(new Contacts(names, phone, email, address)); 
     } catch (Exception e) { 
      //exception handling 
     } finally { 
      if (c != null) { 
       c.close(); 
      } 
     } 
    /*BackgroundTask backgroundTask = new BackgroundTask(this); 
    backgroundTask.execute("get_info");*/ 
    }catch (Exception e) 
    { 

    } 
} 

private void openDatabase() { 
    db = openOrCreateDatabase("contactDB", Context.MODE_PRIVATE,null); 
}

}

logcat的错误

06-28 23:22:34.885 20407-20418/com.example.anilkumar.contactstask E/SQLiteDatabase: close() was never explicitly called on database '/data/data/com.example.anilkumar.contactstask/databases/contactDB' 
                       android.database.sqlite.DatabaseObjectNotClosedException: Application did not close the cursor or database object that was opened here 
                        at android.database.sqlite.SQLiteDatabase.<init>(SQLiteDatabase.java:1943) 
                        at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:1007) 
                        at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:986) 
                        at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:962) 
                        at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:1043) 
                        at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:1036) 
                        at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:761) 
                        at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:215) 
                        at com.example.anilkumar.contactstask.ShowContacts.openDatabase(ShowContacts.java:77) 
                        at com.example.anilkumar.contactstask.ShowContacts.onCreate(ShowContacts.java:32) 
                        at android.app.Activity.performCreate(Activity.java:4466) 
                        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 
                        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920) 
                        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981) 
                        at android.app.ActivityThread.access$600(ActivityThread.java:123) 
                        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147) 
                        at android.os.Handler.dispatchMessage(Handler.java:99) 
                        at android.os.Looper.loop(Looper.java:137) 
                        at android.app.ActivityThread.main(ActivityThread.java:4424) 
                        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:784) 
                        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
                        at dalvik.system.NativeStart.main(Native Method)

来源

2016-06-28 A.asha

其实我肌酐ng数据将被保存，第一个数据只显示下一个数据不能显示它显示异常。它显示openDatabse方法的错误 –

你好回复请 –

字面上复制你得到的错误，粘贴在谷歌。结束了[这个问题]（http://stackoverflow.com/questions/4464892/android-error-close-was-never-explicitly-called-on-database）。 DUDE GOOGLE第一次，问了以后。 – Vucko

添加

db.close();

后

db = doo.getReadableDatabase(); 
c = db.rawQuery(read_query, null);

来源

2016-06-28 18:54:17

其不工作 –

问题在sqlitedatabase和数据显示为cardview

回答

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