Question

我使用自定义ListView填充了CursorAdapter，该自定义ListItem读取我的数据库以获取数据。

TextView包含一个EditTexts，其中包含上面读取的数据和两个<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="match_parent"> <TextView android:id="@+id/good_name" android:layout_width="wrap_content" android:layout_height="@dimen/height_of_list_item" android:paddingLeft="@dimen/padding" android:gravity="center" tools:text="Frozen Chicken"/> <EditText android:id="@+id/sold_edit_text" android:layout_width="wrap_content" android:layout_height="@dimen/height_of_list_item" android:paddingLeft="@dimen/padding" android:gravity="center" android:inputType="number" android:hint="@string/hint_remove_quantity"/> <EditText android:id="@+id/received_edit_text" android:layout_width="wrap_content" android:layout_height="@dimen/height_of_list_item" android:paddingLeft="@dimen/padding" android:gravity="center" android:inputType="number" android:hint="@string/hint_add_quantity"/> </LinearLayout>，我想从中读取数据，并使用其中的值更新数据库。

这是updater_list_item.xml：

    // Find the views
    ListView list = (ListView) findViewById(R.id.list_updater);
    TextView textView = (TextView) findViewById(R.id.updater_empty_view);

    // Set the empty view
    list.setEmptyView(textView);

    // Set the ListView to the custom CursorAdapter
    mAdapter = new UpdaterCursorAdapter(this, null);
    list.setAdapter(mAdapter);

    // the loader requests the data from the database and add it to the adapter
    getLoaderManager().initLoader(STORE_LOADER, null, this);

OnCreate中：

public class UpdaterCursorAdapter extends CursorAdapter {

    public UpdaterCursorAdapter(Context context, Cursor c) {
        super(context, c, 0);
    }

    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent) {
        return LayoutInflater.from(context).inflate(R.layout.updater_list_item, parent, false);
    }

    @Override
    public void bindView(View view, Context context, Cursor cursor) {
    TextView nameTextView = (TextView) view.findViewById(R.id.good_name);
    EditText soldEditText = (EditText) view.findViewById(R.id.sold_edit_text);
    EditText receivedEditText = (EditText) view.findViewById(R.id.received_edit_text);

    int nameColumnIndex = cursor.getColumnIndex(StoreEntry.COLUMN_GOOD_NAME);

    String goodName = cursor.getString(nameColumnIndex);

    nameTextView.setText(goodName);
    }
}

编辑：这是自定义CursorAdapter的代码

EditTexts

如何从Item中的每个ListView获取两个MenuItem的数据？！

注意：我希望在点击onItemClickListener时将数据保存在我的数据库中，以便addTextChangedListener或"users": { "$uid": { // grants write access to the owner of this user account whose uid must exactly match the key ($uid) ".write": "!data.exists() || auth.uid === $uid", // grants read access to any user who is logged in with Facebook ".read": "auth !== null && (auth.provider === 'facebook' || auth.provider === 'google')" } }无法完成工作。

Answer 1

您只需要将编辑文本添加到适配器，然后添加textWatcher并像往常一样更新数据库。

public class UpdaterCursorAdapter extends CursorAdapter {
    public UpdaterCursorAdapter(Context context, Cursor c) {
        super(context, c, 0);
    }

    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent) {
        return LayoutInflater.from(context).inflate(R.layout.updater_list_item, parent, false);
    }

    @Override
    public void bindView(View view, Context context, Cursor cursor) {
        TextView nameTextView = (TextView) view.findViewById(R.id.good_name);
        int nameColumnIndex = cursor.getColumnIndex(StoreContract.StoreEntry.COLUMN_GOOD_NAME);
        String goodName = cursor.getString(nameColumnIndex);
        nameTextView.setText(goodName);

        EditText soldEditText = (EditText) view.findViewById(R.id.sold_edit_text);
        //Set the soldEditText to whatever column your data is in the database same as text view.
        soldEditText.addTextChangedListener(new TextWatcher() {
            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

               // TODO Auto-generated method stub
            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
              // TODO Auto-generated method stub
            }

            @Override
            public void afterTextChanged(Editable s) {
              //This is where you would save the new text your database just
            }
        });
    }
}

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