更新ListView行中与数据库行对应的CheckBox

时间:2011-01-15 23:54:41

标签: java android checkbox onclick

我已经在自定义布局中的CheckBox上设置了android:focusable="false"。我的后端SQLite数据库取决于CheckBox是否被选中。我ListView中的每一行都对应于我数据库中的一行。所以我的问题是,我应该在哪里为CheckBox放置OnClickListener,以便我可以更新与该ListView行关联的项目?我需要将它放在我可以访问id的位置。也许onListItemClick

更新
这是我的自定义适配器:

package com.mohit.geo2do.adapters;

import java.text.SimpleDateFormat;
import java.util.Calendar;

import android.content.Context;
import android.database.Cursor;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.CursorAdapter;
import android.widget.Filterable;
import android.widget.TextView;

import com.mohit.geo2do.R;
import com.mohit.geo2do.provider.Task.Tasks;
import com.mohit.geo2do.utils.Util;

public class TasksAdapter extends CursorAdapter {

    private final Context context;

    public TasksAdapter(Context context, Cursor c) {
        super(context, c);
        this.context = context;
    }

    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent) {
        //Inflate the view 
        LayoutInflater inflater = LayoutInflater.from(context);
        View v = inflater.inflate(R.layout.row_item, parent, false);        
        return v;
    }

    @Override
    public void bindView(View view, Context context, Cursor cursor) {
        CheckBox checkbox = (CheckBox)view.findViewById(R.id.completed);
        TextView due_date = (TextView)view.findViewById(R.id.due_date);

        String title = cursor.getString(cursor.getColumnIndex(Tasks.TITLE));
        boolean completed = Util.intToBool(cursor.getInt(cursor.getColumnIndex(Tasks.COMPLETED)));

        SimpleDateFormat format = new SimpleDateFormat("EEEEEE, MMM dd yyyy hh:mm aa");
        long unixTime = cursor.getLong(cursor.getColumnIndex(Tasks.DUE_DATE));
        Calendar due = Util.timestampToDate(unixTime);

        due_date.setText(format.format(due.getTime()));
        checkbox.setText(title);
        checkbox.setChecked(completed);
    }
}

1 个答案:

答案 0 :(得分:3)

当我做类似的事情时,我创建了一个SimpleCursorAdapter并为它创建了一个ViewBinder。

在viewbinder的setViewValue()中,如果视图是Checkbox的实例,则为更新后端db的复选框添加setOnCheckedChangeListener。如果您需要更多信息,请与我们联系。

也许如果你告诉我你是如何构建SimpleCursorAdapter的话,我可以告诉你如何进一步了解。

public void bindView(View view, Context context, Cursor cursor) {
        CheckBox checkbox = (CheckBox)view.findViewById(R.id.completed);
        TextView due_date = (TextView)view.findViewById(R.id.due_date);

        String title = cursor.getString(cursor.getColumnIndex(Tasks.TITLE));
        boolean completed = Util.intToBool(cursor.getInt(cursor.getColumnIndex(Tasks.COMPLETED)));

        SimpleDateFormat format = new SimpleDateFormat("EEEEEE, MMM dd yyyy hh:mm aa");
        long unixTime = cursor.getLong(cursor.getColumnIndex(Tasks.DUE_DATE));
        Calendar due = Util.timestampToDate(unixTime);

        due_date.setText(format.format(due.getTime()));
        checkbox.setText(title);
        checkbox.setChecked(completed);
        // edit here ..
        checkbox.setOnCheckedChangeListener(
         new CompoundButton.OnCheckedChangeListener() {
          public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {
          // update your value in the db
        });

}