This Demo provides a filterable list which is been filter according to the custom model. here we are using a Student model which can be replace as per need .
1. MainActivity.java
public class MainActivity extends ActionBarActivity {
EditText mEditText;
ListAdapter mAdapter;
private ListView mListView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
showAlertDialog();
mListView = (ListView) findViewById(R.id.listview);
mEditText = (EditText) findViewById(R.id.editText);
int student_name = 0;
String[] names = {"Nishant", "Umang", "Vikrant", "Danish", "Sunil", "Kamal", "Nitesh", "Amit", "Sarthak", "Aman", "Naresh", "Yoginder"};
//arrayList of Students
ArrayList<Student> array_list = new ArrayList<Student>();
for (int x = 1; x <= 5000; x++) {
if (student_name > 11) {
student_name = 0;
}
Student student = new Student(x, names[student_name]);
array_list.add(student);
student_name++;
}
mAdapter = new ListAdapter(this, array_list);
mListView.setAdapter(mAdapter);
//on Text change in Search EditText.
mEditText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
// Filter arrayList on TextChanged in EditText
MainActivity.this.mAdapter.getFilter().filter(s);
}
@Override
public void afterTextChanged(Editable s) {
}
});
mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// get current clicked Item data. Student student = (Student) parent.getItemAtPosition(position);
Toast.makeText(getApplicationContext(), student.getName() + " " + student.getStudentId(), Toast.LENGTH_SHORT).show();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId();
//noinspection SimplifiableIfStatement if (id == R.id.action_info) {
showAlertDialog();
return true;
}
return true;
}
void showAlertDialog() {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this);
// set title
alertDialogBuilder.setTitle(getResources().getString(R.string.alert_dialog_title));
// set dialog message
alertDialogBuilder.setMessage(getResources().getString(R.string.alert_dialog_desc))
.setCancelable(true)
.setPositiveButton(getResources().getString(R.string.alert_dialog_button_text), new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// if this button is clicked, close dialog dialog.cancel();
}
});
// create alert dialog AlertDialog alertDialog = alertDialogBuilder.create();
// show the alert dialog alertDialog.show();
}
}
2. Student.java
public class Student {
private int studentId;
private String name;
/*
* constructor of the Student class which accepting two parameters.
* @parameters id : Student Id.
* @parameters name : Name of the Student
*/
public Student(int id, String name) {
this.studentId = id;
this.name = name;
}
public String getName() {
return name;
}
public int getStudentId() {
return studentId;
}
}
3. ListAdapter.java
public class ListAdapter extends BaseAdapter implements Filterable {
private final Object mLock = new Object();
private List<Student> mArrayList;
private Context mContext;
// A copy of the original mObjects array, initialized from and then used instead as soon as
// the mFilter ArrayFilter is used. mObjects will then only contain the filtered values.
private ArrayList<Student> mOriginalValues;
private ArrayFilter mFilter;
public ListAdapter(Context context, ArrayList<Student> arrayList) {
mContext = context;
mArrayList = arrayList;
}
@Override
public int getCount() {
return mArrayList.size();
}
@Override
public Object getItem(int position) {
return mArrayList.get(position);
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if (convertView == null) {
LayoutInflater inflater = ((Activity) mContext).getLayoutInflater();
convertView = inflater.inflate(R.layout.list_item, parent, false);
viewHolder = new ViewHolder();
viewHolder.tvStudentName = (TextView) convertView.findViewById(R.id.tv_listitem);
viewHolder.tvStudentId=(TextView)convertView.findViewById(R.id.tv_student_id);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
if (mArrayList.get(position) != null) {
viewHolder.tvStudentName.setText(mArrayList.get(position).getName());
viewHolder.tvStudentId.setText(""+mArrayList.get(position).getStudentId());
viewHolder.tvStudentName.setTag(mArrayList.get(position));
}
return convertView;
}
/**
* <p>Returns a filter that can be used to constrain data with a filtering
* pattern.</p>
* <p/>
* <p>This method is usually implemented by {@link android.widget.Adapter}
* classes.</p>
*
* @return a filter used to constrain data
*/
@Override
public Filter getFilter() {
if (mFilter == null) {
mFilter = new ArrayFilter();
}
return mFilter;
}
private class ViewHolder {
TextView tvStudentName,tvStudentId;
}
private class ArrayFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence prefix) {
FilterResults results = new FilterResults();
if (mOriginalValues == null) {
synchronized (mLock) {
mOriginalValues = new ArrayList<Student>(mArrayList);
}
}
if (prefix == null || prefix.length() == 0) {
ArrayList<Student> list;
synchronized (mLock) {
list = new ArrayList<Student>(mOriginalValues);
}
results.values = list;
results.count = list.size();
} else {
String prefixString = prefix.toString().toLowerCase();
ArrayList<Student> values;
synchronized (mLock) {
values = new ArrayList<Student>(mOriginalValues);
}
final int count = values.size();
final ArrayList<Student> newValues = new ArrayList<Student>();
for (int i = 0; i < count; i++) {
final Student value = values.get(i);
final String valueText = value.getName().toLowerCase();
final String valueTextId = String.valueOf(value.getStudentId()).toLowerCase();
// First match against the whole, non-splitted value
if (valueText.contains(prefixString) || valueTextId.contains(prefixString)) {
newValues.add(value);
} else {
final String[] words = valueText.split(" ");
final int wordCount = words.length;
// Start at index 0, in case valueText starts with space(s)
for (int k = 0; k < wordCount; k++) {
if (words[k].startsWith(prefixString)) {
newValues.add(value);
break;
}
}
}
}
results.values = newValues;
results.count = newValues.size();
}
return results;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
mArrayList = (List<Student>) results.values;
if (results.count > 0) {
notifyDataSetChanged();
} else {
notifyDataSetInvalidated();
}
}
}
}
XML Layouts :
1. activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" tools:context=".MainActivity">
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/editText"
android:hint="Enter Text"
android:layout_above="@+id/listview"
android:layout_centerHorizontal="true"
/>
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/listview"
android:choiceMode="singleChoice" />
</LinearLayout>
2. list_item.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:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="New Text"
android:id="@+id/tv_listitem"
android:layout_centerVertical="true"
android:paddingBottom="10dp"
android:paddingTop="10dp"
android:layout_centerHorizontal="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Text"
android:id="@+id/tv_student_id"
android:layout_centerInParent="true" />
</RelativeLayout>
3. menu_main.xml
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools" tools:context=".MainActivity">
<item android:id="@+id/action_info" android:title="@string/action_info"
android:orderInCategory="100" app:showAsAction="never" />
</menu>
4. strings.xml
<resources>
<string name="app_name">Filterable List</string>
<string name="action_info">Info</string>
<string name="alert_dialog_desc">This is demo about Offline Filtering from ListView. You can filter with any parameters of list like (Student name or student Id).</string>
<string name="alert_dialog_title">List with Filter Option</string>
<string name="alert_dialog_button_text">OK</string>
</resources>
Output :
