Android Autocomplete Location Search

  

 

First visit

https://console.developers.google.com/

And Create A New Project And Generate a API key

After That Create A New Android studio Project

Then edit build.gradle file  and google library dependency

    compile 'com.google.android.gms:play-services-location:11.8.0'
compile 'com.android.volley:volley:1.1.0'

like this in build.gradle.

After that sync now

Then open AndroidManifest.xml file and add meta for Data And Value for google api which we generate in first step.

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.sswebtricks.sanjeev.autocompletelocation">
<uses-permission android:name="android.permission.INTERNET"/>

 <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <meta-data android:name="com.google.android.geo.API_KEY" android:value="API KEY PUT HERE"/>
    </application>

</manifest>

Now Create a location model for google place api.

LocationModel.java

package com.sswebtricks.sanjeev.autocompletelocation;

import android.util.Log;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import java.util.ArrayList;

/**
 * Created by sanjeev on 4/2/18.
 */

public class LocationModel {

    private static final String TAG = LocationModel.class.getSimpleName();

    private static final String URL = "https://maps.googleapis.com/maps/api/place";
    private static final String API_TYPE = "/autocomplete";
    private static final String OUTPUT = "/json";

    private static final String KEY = "YOUR_API_KEY";

    public ArrayList autocomplete (String input) {
        ArrayList resultList = null;

        HttpURLConnection conn = null;
        StringBuilder jsonResults = new StringBuilder();

        try {
            StringBuilder sb = new StringBuilder(URL + API_TYPE + OUTPUT);
            sb.append("?key=" + KEY);
            sb.append("&types=(cities)");
            sb.append("&input=" + URLEncoder.encode(input, "utf8"));

            URL url = new URL(sb.toString());
            conn = (HttpURLConnection) url.openConnection();
            InputStreamReader in = new InputStreamReader(conn.getInputStream());

            int read;
            char[] buff = new char[1024];
            while ((read = in.read(buff)) != -1) {
                jsonResults.append(buff, 0, read);
            }
        } catch (MalformedURLException e) {
            Log.e(TAG, "Api Error", e);
            return resultList;
        } catch (IOException e) {
            Log.e(TAG, "Connection Error", e);
            return resultList;
        } finally {
            if (conn != null) {
                conn.disconnect();
            }
        }

        try {
            JSONObject Object = new JSONObject(jsonResults.toString());
            JSONArray PredictArray = Object.getJSONArray("predictions");

            resultList = new ArrayList(PredictArray.length());
            for (int i = 0; i < PredictArray.length(); i++) {
                resultList.add(PredictArray.getJSONObject(i).getString("description"));
                
                          }
        } catch (JSONException e) {
            Log.e(TAG, "Cannot Parse Json", e);
        }

        return resultList;
    }
}

Now come to layout file which is activity_main.xml

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.sswebtricks.sanjeev.autocompletelocation.MainActivity">
<LinearLayout
    android:padding="10dp"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
    <AutoCompleteTextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/autocomplete"
        android:hint="Type in your Location" />
</LinearLayout>
    <LinearLayout
        android:padding="5dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <TextView
            android:padding="5dp"
            android:layout_weight="1"
            android:id="@+id/lat"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />
        <TextView
            android:padding="5dp"
            android:layout_weight="1"
            android:id="@+id/lng"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />

    </LinearLayout>
</LinearLayout>
</RelativeLayout>

It look like this

Now create a layout resource file for list item

list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textColor="#000"
    android:padding="10dp"
    android:text="Location"
    android:id="@+id/autocompleteText" />

look like this.

Now create LocationAdapter

LocationAdapter.java

package com.sswebtricks.sanjeev.autocompletelocation;

import android.content.Context;
import android.widget.ArrayAdapter;
import android.widget.Filter;
import android.widget.Filterable;

import java.util.ArrayList;

/**
 * Created by sanjeev on 4/2/18.
 */

public class LocationAdapter extends ArrayAdapter implements Filterable {

    ArrayList resultList;

    Context mContext;
    int mResource;

    LocationModel mPlaceAPI = new LocationModel();

    public LocationAdapter(Context context, int resource) {
        super(context, resource);

        mContext = context;
        mResource = resource;
    }

    @Override
    public int getCount() {
        
        return resultList.size();
    }

    @Override
    public String getItem(int position) {
        return resultList.get(position);
    }

    @Override
    public Filter getFilter() {
        Filter filter = new Filter() {
            @Override
            protected FilterResults performFiltering(CharSequence constraint) {
                FilterResults filterResults = new FilterResults();
                if (constraint != null) {
                    resultList = mPlaceAPI.autocomplete(constraint.toString());

                    filterResults.values = resultList;
                    filterResults.count = resultList.size();
                }

                return filterResults;
            }

            @Override
            protected void publishResults(CharSequence constraint, FilterResults results) {
                if (results != null && results.count > 0) {
                    notifyDataSetChanged();
                }
                else {
                    notifyDataSetInvalidated();
                }
            }
        };

        return filter;
    }
}

Now MainActivity.java Code :

package com.sswebtricks.sanjeev.autocompletelocation;

import android.app.ProgressDialog;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AutoCompleteTextView;
import android.widget.TextView;
import android.widget.Toast;

import com.android.volley.DefaultRetryPolicy;
import com.android.volley.RequestQueue;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.net.URLEncoder;

public class MainActivity extends AppCompatActivity {

    private ProgressDialog progressDialog;
    TextView tlat;
    TextView tlong;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tlat=(TextView)findViewById(R.id.lat);
        tlong=(TextView)findViewById(R.id.lng);
        progressDialog=new ProgressDialog(this);
        AutoCompleteTextView autocompleteView = (AutoCompleteTextView)findViewById(R.id.autocomplete);
        autocompleteView.setAdapter(new LocationAdapter(getApplicationContext(), R.layout.list_item));
        autocompleteView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView parent, View view, int position, long id) {
             
                String description = (String) parent.getItemAtPosition(position);
                FindLatLong(description);
                Toast.makeText(getApplicationContext(), description, Toast.LENGTH_SHORT).show();
            }
        });
    }
    private void FindLatLong(String description) {

        progressDialog.setMessage("Fetching Details..");
        progressDialog.setCancelable(false);
        progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
        progressDialog.show();
        RequestQueue queue = Volley.newRequestQueue(getApplicationContext());
        String url = Uri.parse("https://maps.googleapis.com/maps/api/geocode/json")
                .buildUpon()
                .appendQueryParameter("key"Your API KEY")
                .appendQueryParameter("address", URLEncoder.encode(description))
                .build().toString();
        StringRequest sr = new StringRequest(com.android.volley.Request.Method.GET, url, new com.android.volley.Response.Listener() {
            @Override
            public void onResponse(String response) {
                progressDialog.dismiss();
                try {
                    JSONObject jsonObj = new JSONObject(response);
                    if(jsonObj.getJSONArray("results")!=null) {
                        JSONArray destination_addresses = jsonObj.getJSONArray("results");
                        JSONObject geometry= (JSONObject) destination_addresses.get(0);
                        String lat=String.format("%.4f",geometry.getJSONObject("geometry").getJSONObject("location").getDouble("lat"));
                        String lng=String.format("%.4f",geometry.getJSONObject("geometry").getJSONObject("location").getDouble("lng"));
                        Log.d("element", response.toString());
                        tlat.setText("Lat : "+lat);
                        tlong.setText("Long : "+lng);

                    }
                    else{
                        Toast.makeText(MainActivity.this, "Error in finding ", Toast.LENGTH_SHORT).show();
                        progressDialog.dismiss();

                    }


                } catch (JSONException e) {
                    e.printStackTrace();
                    progressDialog.dismiss();

                }
                Log.d("Response", response);

            }
        }, new com.android.volley.Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                progressDialog.dismiss();
                Log.d("Errors", String.valueOf(error));
            }
        });
        queue.add(sr);
        sr.setRetryPolicy(new DefaultRetryPolicy(
                20000,
                DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
                DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
    }

}

Now Run Your App And Don't Forget To Put Api Key

Download Complete Source Code