自定義活動的結果失敗？

Question

我一直在嘗試解決這一段時間，我似乎無法弄清楚我在做什麼錯。我試圖查看其他人遇到的類似問題，但他們的解決方案似乎無法解決我看來的問題。 Anywho ...

，我發現了錯誤：

java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1327, result=-1, data=Intent { (has extras) }} to activity {thinkgeist.wheresmystuff/thinkgeist.wheresmystuff.MainActivity}: java.lang.IllegalStateException: attempt to re-open an already-closed object: SQLiteQuery: SELECT * FROM items at android.app.ActivityThread.deliverResults(ActivityThread.java:4053) at android.app.ActivityThread.handleSendResult(ActivityThread.java:4096) at android.app.ActivityThread.-wrap20(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1516) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6077) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)

當試圖從我創建了名爲CreateActivity方法返回。下面是它是如何從 MainActivity稱爲：

public void createItem(){ 
    Intent intent = new Intent(this, CreateActivity.class); 
    startActivityForResult(intent, CREATE_ACTIVITY); 
} 

這個調用的代碼後，我們就跳到 CreateActivity：

public class CreateActivity extends AppCompatActivity { 

@Override 
protected void onCreate(Bundle savedInstanceState) { 

    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_create); 

    final EditText etName = (EditText) findViewById(R.id.etName); 
    final EditText etDescription = (EditText) findViewById(R.id.etDescription); 
    final EditText etSerial = (EditText) findViewById(R.id.etSerial); 
    final EditText etLocation = (EditText) findViewById(R.id.etLocation); 
    final EditText etQuantity = (EditText) findViewById(R.id.etQuantity); 

    Button submit = (Button) findViewById(R.id.buttonSubmit); 

    submit.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      String name = etName.getText().toString(); 
      String description = etDescription.getText().toString(); 
      String serial = etSerial.getText().toString(); 
      String location = etLocation.getText().toString(); 
      int quantity = Integer.parseInt(etQuantity.getText().toString()); 

      Item item = new Item(1, name, description, serial, location, quantity); 

      Intent resultIntent = new Intent(); 
      resultIntent.putExtra("name", name); 
      resultIntent.putExtra("description", description); 
      resultIntent.putExtra("serial", serial); 
      resultIntent.putExtra("location", location); 
      resultIntent.putExtra("quantity", quantity); 
      setResult(Activity.RESULT_OK, resultIntent); 
      finish(); 

     } 
    }); 
} 

最後的代碼MainActivity處理該響應...

@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data){ 
    super.onActivityResult(requestCode, resultCode, data); 
    // Extract data from Create Activity 

    if(requestCode == CREATE_ACTIVITY && resultCode==RESULT_OK && data != null) { 

      String name = data.getStringExtra("name"); 
      String description = data.getStringExtra("description"); 
      String serial = data.getStringExtra("serial"); 
      String location = data.getStringExtra("location"); 
      int quantity = data.getIntExtra("quantity", 1); 
      addItemToDatabase(name, description, serial, location, quantity); 

    } 
} 

老實說，我認爲這只是我在某處使用一些不正確的語法，因爲我還不完全熟悉android開發。如果任何人都可以指出我正確的方向，將不勝感激。

Answer 1

java.lang.IllegalStateException: attempt to re-open an already-closed object: SQLiteQuery

我想在addItemToDatabase()您要執行數據庫的操作，這是封閉的。