How to populate a ListView from my database using sqlite

Question

I was trying to populate my listview with data from sqlite in onclicklistener of my load button.

However, I\'m a little confused from the examples I have seen. here

Answer 1

Use a CustomAdapter

public class Display extends Activity implements OnItemClickListener{

    DatabaseManager db;
    List<PlayerData> contacts;
    ArrayList<String> con= new ArrayList<String>();
    LayoutInflater mInflater;
    CheckBox cb;
    TextView tv1;
    CustomAdapter cus;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.listview);
        ListView lv= (ListView) findViewById(R.id.lv);
        db = new DatabaseManager(this);

           contacts = db.getAllContacts();       
        cus = new CustomAdapter();
        lv.setAdapter(cus);
        lv.setOnItemClickListener(this); 
        lv.setItemsCanFocus(false);
        lv.setTextFilterEnabled(true);
        Button b= (Button) findViewById(R.id.button1);
        b.setOnClickListener(new OnClickListener()
        {

            @Override
            public void onClick(View v) {
                StringBuilder sb = new StringBuilder();
                for(int i = 0; i < contacts.size(); i++)

                {
                if(cus.mCheckStates.get(i)==true)
                {
                    sb.append(contacts.get(i).getPhoneNumber());
                    sb.append("\n");

                }                    
            }
                Toast.makeText(getApplicationContext(), sb,
                            Toast.LENGTH_LONG).show();
                Intent intent = new Intent(Display.this,SendMessage.class);
                if(con!=null)
                {
                intent.putStringArrayListExtra("list",con);
                startActivity(intent);
                }
            }
        });

    }
    public void onItemClick(AdapterView parent, View view, int
            position, long id) {
                cus.toggle(position);

            }
    class CustomAdapter extends BaseAdapter implements CompoundButton.OnCheckedChangeListener
    {
          private SparseBooleanArray mCheckStates;
        CustomAdapter()
        {
            mCheckStates = new SparseBooleanArray(contacts.size());
             mInflater = (LayoutInflater)Display.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        }
        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return contacts.size();
        }

        @Override
        public Object getItem(int position) {
            // TODO Auto-generated method stub
            return position;
        }

        @Override
        public long getItemId(int position) {
            // TODO Auto-generated method stub

            return 0;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            // TODO Auto-generated method stub
            View vi=convertView;
            if(convertView==null)
             vi = mInflater.inflate(R.layout.rowlayout, null); 
             TextView tv= (TextView) vi.findViewById(R.id.textView1);
             tv1= (TextView) vi.findViewById(R.id.textView2);
             cb = (CheckBox) vi.findViewById(R.id.checkBox1);
             tv.setText("Name :"+ contacts.get(position).getName());
             tv1.setText("Phone No :"+ contacts.get(position).getPhoneNumber());
             cb.setTag(position);
             cb.setChecked(mCheckStates.get(position, false));
             cb.setOnCheckedChangeListener(this);
            return vi;
        }
         public boolean isChecked(int position) {
                return mCheckStates.get(position, false);
            }

            public void setChecked(int position, boolean isChecked) {
                mCheckStates.put(position, isChecked);
                notifyDataSetChanged();
            }

            public void toggle(int position) {
                setChecked(position, !isChecked(position));
            }
        @Override
        public void onCheckedChanged(CompoundButton buttonView,
                boolean isChecked) {
            // TODO Auto-generated method stub
             mCheckStates.put((Integer) buttonView.getTag(), isChecked);    

        }

    }

}

listview.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <ListView
        android:id="@+id/lv"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" 
        android:layout_above="@+id/button1"/>

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:text="Button" />

</RelativeLayout>

rowlayout.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="15dp"
        android:layout_marginTop="34dp"
        android:text="TextView" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/checkBox1"
        android:layout_alignLeft="@+id/textView1"
        android:text="TextView" />

    <CheckBox
        android:id="@+id/checkBox1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/textView1"
        android:layout_marginRight="33dp"
        android:text="@string/choice" />

</RelativeLayout>

Each row in listview will look like below. You can click the check box to select and unselect. Later you can get the selected item and do whatever is required.

Click the button at the bottom after checking the checkbox.