Question

大家好，我有listview，显示sqlite db中的项目列表。使用DialogBox我在DB中插入数据。插入成功完成。但是，如果我在DialogBox上输入数据并单击“确定”按钮，则插入数据但插入数据的数据不会显示在ListView中。

ListView没有刷新....我使用adapter.setNotifyOnChange(true);。但这不会对listview产生任何影响。

我在logcat上收到警告

`09-16 15:01:10.215: INFO/dalvikvm(2066): Uncaught exception thrown by finalizer (will be discarded):
09-16 15:01:10.215: INFO/dalvikvm(2066): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@44c4be28 on PAYMENT_TABLE that has not been deactivated or closed
09-16 15:01:10.215: INFO/dalvikvm(2066):     at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596)
09-16 15:01:10.215: INFO/dalvikvm(2066):     at dalvik.system.NativeStart.run(Native Method)`

但是我在OnDestory（）

中关闭了光标

这是我的代码。

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);

    mySQLiteAdapter = new SQLiteAdapter(this);         
    mySQLiteAdapter.openToWrite();
    cursor = mySQLiteAdapter.queueAll();

    cursor.moveToFirst();
    while(!cursor.isAfterLast()) {          
        String mTitleRaw = cursor.getString(cursor.getColumnIndex(SQLiteAdapter.KEY_PAYMENT_TYPE));
        al.add(mTitleRaw);
        cursor.moveToNext();
        }    

    adapterChanged();
}

@SuppressWarnings("unchecked")
private void adapterChanged() {
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
            android.R.layout.simple_list_item_multiple_choice, al);

    adapter.setNotifyOnChange(true);
    setListAdapter(adapter);

    listContent = getListView();
    listContent.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
}

@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
    // TODO Auto-generated method stub
    super.onListItemClick(l, v, position, id);
    //Object o = this.getListAdapter().getItem(position);
}

@Override
protected void onDestroy() {
    // TODO Auto-generated method stub
    super.onDestroy();
    if (mySQLiteAdapter != null) {
        mySQLiteAdapter.close();
    }
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // TODO Auto-generated method stub
    menu.add(0, MENU_ADD, 0, "Add New");                
    return super.onCreateOptionsMenu(menu);
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // TODO Auto-generated method stub
    switch(item.getItemId()) {      
    case MENU_ADD:
        AlertMsg();         
        return true;        
    }
    return super.onOptionsItemSelected(item);
}

private void updateList(){
    cursor.requery();
    }   

public void AlertMsg() {
    AlertDialog.Builder alert = new AlertDialog.Builder(this);
    alert.setTitle("Payment Type");
    alert.setMessage("Add field");
    final EditText mTxt = new EditText(this);
    alert.setView(mTxt);
    alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {

        public void onClick(DialogInterface dialog, int which) {
            // TODO Auto-generated method stub              
            String mNewField = mTxt.getText().toString();
            //Toast.makeText(getApplicationContext(), "Item " + mNewField + " Added", Toast.LENGTH_LONG).show();
            mySQLiteAdapter.insert(mNewField);
            updateList();

            adapterChanged();
        }
    });
    alert.show();
}

}

这是有效的方式......

任何人都可以提出一些建议......

感谢......

通过Android DialogBox插入数据后ListView没有更新？

0 个答案: