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POHow to manage the state of Custom ListView Items
 

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  1. POHow to manage the state of Custom ListView Items
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    <p>I am developing an application in which I have to move from one ListView to another ListView by clicking the first ListView.The 2nd Activities ListView is a custom ListView with one yes Icon Image and a TextView. The image icon is invisible in starting and after clicking on list item the corresponding image will become Visible.2nd ListView is single click listview.![enter image description here][1] When I click on the back button and again clicks on the First ListView,The Clicked item of 2nd ListView become invisible..</p> <p>I am new in android and don't know how I have to manage the state of the listitem clicking. Plz help... I have to move from 1st screen to 2nd screen and maintain the state of listview item when reclick is made on 1st listview item.</p> <p>2nd listview Activity</p> <pre><code>SharedPreferences pref; private static String names[] = {"SV3","SV4","SV6","LV1"}; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.selectibx); lv=(ListView)findViewById(R.id.listView1); adapter = new LvCustomAdapter(this, names); lv.setAdapter(adapter); LoadSelections(); ImageView img=(ImageView) lv.findViewById(R.id.image); if(img!=null) { img.setImageResource(R.drawable.black_arrow); img.setVisibility(View.VISIBLE); } lv.setOnItemClickListener(this); back=(ImageView)findViewById(R.id.imageback); back.setOnClickListener(new View.OnClickListener() { public void onClick(View arg0) { Intent = new Intent(getApplicationContext(),MainActivity.class); Bundle b=new Bundle(); b.putString("state", "clicked"); intent.putExtras(b); setResult(RESULT_OK, intent); startActivity(intent); finish(); } }); } public void onItemClick(AdapterView&lt;?&gt; lvv, View view, int position, long id) { if (current != -1) { View last = lvv.getChildAt(current); // the last one clicked last.findViewById(R.id.image).setVisibility(View.GONE); } view.findViewById(R.id.image).setVisibility(View.VISIBLE); current = position; // remember the new clicked position System.out.println("Selected State is: "+current); SaveSelections(view); } private void SaveSelections(View v) { // TODO Auto-generated method stub SharedPreferences settings = getSharedPreferences( PREFS_NAME,0 ); SharedPreferences.Editor editor = settings.edit(); editor.putInt("Raman", current); editor.commit(); } private void LoadSelections() { pref = this.getApplicationContext().getSharedPreferences(PREFS_NAME, MODE_WORLD_READABLE); int xy=pref.getInt("Raman",1); adapter = new LvCustomAdapter(this, names); lv.setAdapter(adapter); lv.setSelection(xy); System.out.println(lv.getSelectedItemPosition()+"****"+xy); View v=lv.getChildAt(xy); } </code></pre> <p>}</p> <p><strong>Custom Adapter class:</strong></p> <pre><code>public class LvCustomAdapter extends BaseAdapter { protected ListView mListView; public String title[]; //public String designations[]; public Activity context; public LayoutInflater inflater; int current=-1; public LvCustomAdapter(Activity context,String[] title) { super(); this.context = context; this.title = title; this.inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); } public int getCount() { // TODO Auto-generated method stub return title.length; } public Object getItem(int position) { // TODO Auto-generated method stub return null; } public long getItemId(int position) { // TODO Auto-generated method stub return 0; } public static class ViewHolder { ImageView imgarrow; TextView txtViewName; } public View getView(int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub ViewHolder holder; if(convertView==null) { holder = new ViewHolder(); convertView = inflater.inflate(R.layout.commonlist, null); holder.txtViewName = (TextView) convertView.findViewById(R.id.tvItem); holder.imgarrow = (ImageView) convertView.findViewById(R.id.image); /* holder.email.setOnClickListener(emailClickListener); holder.mobile.setOnClickListener(mobileClickListener); holder.phone.setOnClickListener(phoneClickListener); convertView.setTag(holder); */ //int a=convertView.getSelectedItemPosition(); int a=position; convertView.setTag(holder); } else holder=(ViewHolder)convertView.getTag(); holder.txtViewName.setText(title[position]); holder.imgarrow.setImageResource(R.drawable.black_arrow); holder.imgarrow.setVisibility(View.INVISIBLE); return convertView; } } </code></pre> <p>Thanks....</p>
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