Search address by name with Geocoder, with Search Dialog.

Last exercise demonstrate how to "search address by name with Geocoder".

Modify AndroidManifest.xml.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.androidsearchgeocoder"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.androidsearchgeocoder.MainActivity"
            android:label="@string/app_name"
            android:launchMode="singleTop" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
            <intent-filter>
                <action android:name="android.intent.action.SEARCH" />
            </intent-filter>
            <meta-data android:name="android.app.searchable"
                       android:resource="@xml/searchable" />
        </activity>

    </application>

</manifest>

/res/xml/searchable.xml

<searchable xmlns:android="http://schemas.android.com/apk/res/android"
        android:label="@string/app_name"
        android:hint="Search by Name"
        >
</searchable>

MainActivity.java

package com.example.androidsearchgeocoder;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;

import android.location.Address;
import android.location.Geocoder;
import android.os.Bundle;
import android.app.Activity;
import android.app.SearchManager;
import android.content.Intent;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

public class MainActivity extends Activity {

 ListView listResult;
 
 private ArrayAdapter<String> adapter;
 
 Geocoder geocoder;
 final static int maxResults = 5;
 List<Address> locationList;
 List<String> locationNameList;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  listResult = (ListView)findViewById(R.id.resultlist);
  
  handleIntent(getIntent());
  
  geocoder = new Geocoder(this, Locale.ENGLISH);
  
  locationNameList = new ArrayList<String>(); //empty in start
  adapter = new ArrayAdapter<String>(this,
    android.R.layout.simple_spinner_item, locationNameList);
  listResult.setAdapter(adapter);
 }

 @Override
 protected void onNewIntent(Intent intent) {
  setIntent(intent);
  handleIntent(intent);
 }
 
    private void handleIntent(Intent intent) {
        if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
            String query = intent.getStringExtra(SearchManager.QUERY);
            doSearch(query);
        }
    }

    private void doSearch(String query){
     
     try {
      locationList = geocoder.getFromLocationName(query, maxResults);
      
      if(locationList == null){
       Toast.makeText(getApplicationContext(), 
         "locationList == null", 
         Toast.LENGTH_LONG).show(); 
      }else{
       if(locationList.isEmpty()){
        Toast.makeText(getApplicationContext(), 
          "locationList is empty", 
          Toast.LENGTH_LONG).show(); 
       }else{
        Toast.makeText(getApplicationContext(), 
          "number of result: " + locationList.size(), 
          Toast.LENGTH_LONG).show();
      
        locationNameList.clear();
      
        for(Address i : locationList){
         if(i.getFeatureName() == null){
          locationNameList.add("unknown"); 
         }else{
          locationNameList.add(i.getFeatureName());
          
         } 
        }
      
        adapter.notifyDataSetChanged(); 
       } 
      } 
     } catch (IOException e) {
      Toast.makeText(getApplicationContext(), 
        "network unavailable or any other I/O problem occurs", 
        Toast.LENGTH_LONG).show();
      e.printStackTrace(); 
     }
  
     String result ="Finished - " + query;

     //I can't close search dialog, so I call it again to keep it active.
     //Otherwise, user see the search dialog opened, but cannot search in seconf time. 
     onSearchRequested();
     
    }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  // Inflate the menu; this adds items to the action bar if it is present.
  getMenuInflater().inflate(R.menu.main, menu);
  return true;
 }

 @Override
 public boolean onOptionsItemSelected(MenuItem item) {
  switch (item.getItemId()) {
        case R.id.search:
            onSearchRequested();
            return true;
        default:
            return false;    
  }
 }

}

Layout

<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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />
    <ListView
        android:id="@+id/resultlist"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

Download the files.

Next:
- Get details of Address returned from Geocoder