Android 简单显示SQlite数据库中的数据

我试图找到一个在布局中显示SQLite数据库数据的简单示例。 我试图查看“Notebook”示例，但它只有一个输出列。 有没有一个例子是多个输出列，如果可能的话，在某些列中包含整数数据？

Blitz

你可能想考虑创建自己的客户。对于我的项目，我创建了一个自定义。结果是：

如果您想以自定义游标适配器为例，这里是我的代码：

public class ItemAdapter extends CursorAdapter {
    private LayoutInflater mLayoutInflater;
    private Context mContext;
    public ItemAdapter(Context context, Cursor c) {
        super(context, c);
        mContext = context;
        mLayoutInflater = LayoutInflater.from(context); 
    }

    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent) {
        View v = mLayoutInflater.inflate(R.layout.items_row, parent, false);
        return v;
    }

    /**
     * @author will
     * 
     * @param   v
     *          The view in which the elements we set up here will be displayed.
     * 
     * @param   context
     *          The running context where this ListView adapter will be active.
     * 
     * @param   c
     *          The Cursor containing the query results we will display.
     */

    @Override
    public void bindView(View v, Context context, Cursor c) {
        String title = c.getString(c.getColumnIndexOrThrow(ItemDbAdapter.KEY_TITLE));
        String date = c.getString(c.getColumnIndexOrThrow(ItemDbAdapter.KEY_DATE));
        String imagePath = c.getString(c.getColumnIndexOrThrow(ItemDbAdapter.KEY_IMG));
        String reminder = c.getString(c.getColumnIndexOrThrow(ItemDbAdapter.KEY_REMINDER));
        int deletion = c.getInt(c.getColumnIndexOrThrow(ItemDbAdapter.KEY_DELETION));
        int priority = c.getInt(c.getColumnIndexOrThrow(ItemDbAdapter.KEY_PRIORITY));

        /**
         * Next set the title of the entry.
         */

        TextView title_text = (TextView) v.findViewById(R.id.item_text);
        if (title_text != null) {
            title_text.setText(title);
        }

        setPriorityColor(title_text, priority);

        /**
         * Set Date
         */

        TextView date_text = (TextView) v.findViewById(R.id.item_date);
        if (date_text != null) {
            date_text.setText(date);
        }       

        /**
         * Decide if we should display the paper clip icon denoting image attachment
         */

        ImageView item_image = (ImageView) v.findViewById(R.id.item_attachment);
        item_image.setVisibility(ImageView.INVISIBLE);
        if (imagePath != null && imagePath.length() != 0 && item_image != null) {
            item_image.setVisibility(ImageView.VISIBLE);
        }

        /**
         * Decide if we should display the deletion indicator
         */
        ImageView del_image = (ImageView) v.findViewById(R.id.item_deletion);
        del_image.setVisibility(ImageView.INVISIBLE);
        if (deletion == 1) {
            del_image.setVisibility(ImageView.VISIBLE);
        }

        /**
         * Decide if we should display the reminder indicator
         */
        ImageView rem_image = (ImageView) v.findViewById(R.id.item_reminder);
        rem_image.setVisibility(ImageView.INVISIBLE);
        if(reminder != null && reminder.length() != 0 && rem_image != null) {
            rem_image.setVisibility(ImageView.VISIBLE);
        }
    }

    /**
     * Set the priority colors based on the SharedPreferences
     * 
     * @author will
     * 
     * @param   title 
     *          The particular TextView item we are handling
     * @param   priority 
     *          The current TextView item's associated priority level
     */

    private void setPriorityColor(TextView title, int priority) {
        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(mContext);
        Resources res = mContext.getResources();

        switch(priority) {
        case ItemDbAdapter.PRIORITY_HIGH:
            title.setTextColor(prefs.getInt("highColor", res.getColor(R.color.high_priority)));
            break;
        case ItemDbAdapter.PRIORITY_NORMAL:
            title.setTextColor(prefs.getInt("normColor", res.getColor(R.color.norm_priority)));
            break;
        case ItemDbAdapter.PRIORITY_LOW:
            title.setTextColor(prefs.getInt("lowColor", res.getColor(R.color.low_priority)));
            break;
        }
    }
}

private void fillData(String sortOrder) {
    Cursor itemsCursor = mDbHelper.fetchAllItems(sortOrder);
    startManagingCursor(itemsCursor);

    ItemAdapter itemAdapter = new ItemAdapter(this, itemsCursor);
    setListAdapter(itemAdapter);
    itemAdapter = null;
}

和单个项目的xml:

public class ItemAdapter extends CursorAdapter {
    private LayoutInflater mLayoutInflater;
    private Context mContext;
    public ItemAdapter(Context context, Cursor c) {
        super(context, c);
        mContext = context;
        mLayoutInflater = LayoutInflater.from(context); 
    }

    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent) {
        View v = mLayoutInflater.inflate(R.layout.items_row, parent, false);
        return v;
    }

    /**
     * @author will
     * 
     * @param   v
     *          The view in which the elements we set up here will be displayed.
     * 
     * @param   context
     *          The running context where this ListView adapter will be active.
     * 
     * @param   c
     *          The Cursor containing the query results we will display.
     */

    @Override
    public void bindView(View v, Context context, Cursor c) {
        String title = c.getString(c.getColumnIndexOrThrow(ItemDbAdapter.KEY_TITLE));
        String date = c.getString(c.getColumnIndexOrThrow(ItemDbAdapter.KEY_DATE));
        String imagePath = c.getString(c.getColumnIndexOrThrow(ItemDbAdapter.KEY_IMG));
        String reminder = c.getString(c.getColumnIndexOrThrow(ItemDbAdapter.KEY_REMINDER));
        int deletion = c.getInt(c.getColumnIndexOrThrow(ItemDbAdapter.KEY_DELETION));
        int priority = c.getInt(c.getColumnIndexOrThrow(ItemDbAdapter.KEY_PRIORITY));

        /**
         * Next set the title of the entry.
         */

        TextView title_text = (TextView) v.findViewById(R.id.item_text);
        if (title_text != null) {
            title_text.setText(title);
        }

        setPriorityColor(title_text, priority);

        /**
         * Set Date
         */

        TextView date_text = (TextView) v.findViewById(R.id.item_date);
        if (date_text != null) {
            date_text.setText(date);
        }       

        /**
         * Decide if we should display the paper clip icon denoting image attachment
         */

        ImageView item_image = (ImageView) v.findViewById(R.id.item_attachment);
        item_image.setVisibility(ImageView.INVISIBLE);
        if (imagePath != null && imagePath.length() != 0 && item_image != null) {
            item_image.setVisibility(ImageView.VISIBLE);
        }

        /**
         * Decide if we should display the deletion indicator
         */
        ImageView del_image = (ImageView) v.findViewById(R.id.item_deletion);
        del_image.setVisibility(ImageView.INVISIBLE);
        if (deletion == 1) {
            del_image.setVisibility(ImageView.VISIBLE);
        }

        /**
         * Decide if we should display the reminder indicator
         */
        ImageView rem_image = (ImageView) v.findViewById(R.id.item_reminder);
        rem_image.setVisibility(ImageView.INVISIBLE);
        if(reminder != null && reminder.length() != 0 && rem_image != null) {
            rem_image.setVisibility(ImageView.VISIBLE);
        }
    }

    /**
     * Set the priority colors based on the SharedPreferences
     * 
     * @author will
     * 
     * @param   title 
     *          The particular TextView item we are handling
     * @param   priority 
     *          The current TextView item's associated priority level
     */

    private void setPriorityColor(TextView title, int priority) {
        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(mContext);
        Resources res = mContext.getResources();

        switch(priority) {
        case ItemDbAdapter.PRIORITY_HIGH:
            title.setTextColor(prefs.getInt("highColor", res.getColor(R.color.high_priority)));
            break;
        case ItemDbAdapter.PRIORITY_NORMAL:
            title.setTextColor(prefs.getInt("normColor", res.getColor(R.color.norm_priority)));
            break;
        case ItemDbAdapter.PRIORITY_LOW:
            title.setTextColor(prefs.getInt("lowColor", res.getColor(R.color.low_priority)));
            break;
        }
    }
}

private void fillData(String sortOrder) {
    Cursor itemsCursor = mDbHelper.fetchAllItems(sortOrder);
    startManagingCursor(itemsCursor);

    ItemAdapter itemAdapter = new ItemAdapter(this, itemsCursor);
    setListAdapter(itemAdapter);
    itemAdapter = null;
}

以下是主要

活动的代码：
我调用此函数以使用自定义适配器显示光标：

public class ItemAdapter extends CursorAdapter {
    private LayoutInflater mLayoutInflater;
    private Context mContext;
    public ItemAdapter(Context context, Cursor c) {
        super(context, c);
        mContext = context;
        mLayoutInflater = LayoutInflater.from(context); 
    }

    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent) {
        View v = mLayoutInflater.inflate(R.layout.items_row, parent, false);
        return v;
    }

    /**
     * @author will
     * 
     * @param   v
     *          The view in which the elements we set up here will be displayed.
     * 
     * @param   context
     *          The running context where this ListView adapter will be active.
     * 
     * @param   c
     *          The Cursor containing the query results we will display.
     */

    @Override
    public void bindView(View v, Context context, Cursor c) {
        String title = c.getString(c.getColumnIndexOrThrow(ItemDbAdapter.KEY_TITLE));
        String date = c.getString(c.getColumnIndexOrThrow(ItemDbAdapter.KEY_DATE));
        String imagePath = c.getString(c.getColumnIndexOrThrow(ItemDbAdapter.KEY_IMG));
        String reminder = c.getString(c.getColumnIndexOrThrow(ItemDbAdapter.KEY_REMINDER));
        int deletion = c.getInt(c.getColumnIndexOrThrow(ItemDbAdapter.KEY_DELETION));
        int priority = c.getInt(c.getColumnIndexOrThrow(ItemDbAdapter.KEY_PRIORITY));

        /**
         * Next set the title of the entry.
         */

        TextView title_text = (TextView) v.findViewById(R.id.item_text);
        if (title_text != null) {
            title_text.setText(title);
        }

        setPriorityColor(title_text, priority);

        /**
         * Set Date
         */

        TextView date_text = (TextView) v.findViewById(R.id.item_date);
        if (date_text != null) {
            date_text.setText(date);
        }       

        /**
         * Decide if we should display the paper clip icon denoting image attachment
         */

        ImageView item_image = (ImageView) v.findViewById(R.id.item_attachment);
        item_image.setVisibility(ImageView.INVISIBLE);
        if (imagePath != null && imagePath.length() != 0 && item_image != null) {
            item_image.setVisibility(ImageView.VISIBLE);
        }

        /**
         * Decide if we should display the deletion indicator
         */
        ImageView del_image = (ImageView) v.findViewById(R.id.item_deletion);
        del_image.setVisibility(ImageView.INVISIBLE);
        if (deletion == 1) {
            del_image.setVisibility(ImageView.VISIBLE);
        }

        /**
         * Decide if we should display the reminder indicator
         */
        ImageView rem_image = (ImageView) v.findViewById(R.id.item_reminder);
        rem_image.setVisibility(ImageView.INVISIBLE);
        if(reminder != null && reminder.length() != 0 && rem_image != null) {
            rem_image.setVisibility(ImageView.VISIBLE);
        }
    }

    /**
     * Set the priority colors based on the SharedPreferences
     * 
     * @author will
     * 
     * @param   title 
     *          The particular TextView item we are handling
     * @param   priority 
     *          The current TextView item's associated priority level
     */

    private void setPriorityColor(TextView title, int priority) {
        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(mContext);
        Resources res = mContext.getResources();

        switch(priority) {
        case ItemDbAdapter.PRIORITY_HIGH:
            title.setTextColor(prefs.getInt("highColor", res.getColor(R.color.high_priority)));
            break;
        case ItemDbAdapter.PRIORITY_NORMAL:
            title.setTextColor(prefs.getInt("normColor", res.getColor(R.color.norm_priority)));
            break;
        case ItemDbAdapter.PRIORITY_LOW:
            title.setTextColor(prefs.getInt("lowColor", res.getColor(R.color.low_priority)));
            break;
        }
    }
}

private void fillData(String sortOrder) {
    Cursor itemsCursor = mDbHelper.fetchAllItems(sortOrder);
    startManagingCursor(itemsCursor);

    ItemAdapter itemAdapter = new ItemAdapter(this, itemsCursor);
    setListAdapter(itemAdapter);
    itemAdapter = null;
}

主要活动的XML：顶部相对布局用于操作栏


Thx。我会仔细查看并尝试一下。你能给我一个例子，说明你是如何将它整合到整个UI屏幕中的吗？添加的代码显示了适配器是如何从主活动中使用的，以及主活动的xml是如何使用的。谢谢。还有一个问题：由于没有setListAdapter，如何将数据放入对话框中。