How to Implement Google Place API  in Android Studio.

Creating New Project.
Open android studio and create a new project.

File => New => New Project => Configure your new project => Select the form factor yours app will run on => Add an Activity to Mobile => Customize the Activity => Finish.

First we need to add Library to our project.
compile 'com.google.android.gms:play-services:8.4.0'

Create Xml file in project.
Open => app => res => layout - activity_main.xml.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical"
    android:padding="24dp">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/icons"
        android:elevation="2dp"
        android:orientation="vertical"
        android:padding="8dp">

        <android.support.design.widget.TextInputLayout
            android:id="@+id/input_layout_from"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <EditText
                android:id="@+id/edtFrom"
                android:layout_width="match_parent"
                android:layout_height="40dp"
                android:editable="false"
                android:focusable="false"
                android:focusableInTouchMode="false"
                android:hint="From" />
        </android.support.design.widget.TextInputLayout>

        <android.support.design.widget.TextInputLayout
            android:id="@+id/input_layout_to"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp">

            <EditText
                android:id="@+id/edtTo"
                android:layout_width="match_parent"
                android:layout_height="40dp"
                android:editable="false"
                android:focusable="false"
                android:focusableInTouchMode="false"
                android:hint="To" />
        </android.support.design.widget.TextInputLayout>
    </LinearLayout>

    <Button
        android:id="@+id/find"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:text="Find Now"
        android:textColor="@color/icons" />
</LinearLayout>


Create the Java file in project.
Open app => main => src = FragmentFind.java
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import com.conn.findroute.R;
import com.google.android.gms.common.GooglePlayServicesNotAvailableException;
import com.google.android.gms.common.GooglePlayServicesRepairableException;
import com.google.android.gms.common.api.Status;
import com.google.android.gms.location.places.Place;
import com.google.android.gms.location.places.ui.PlaceAutocomplete;


public class FragmentFind extends Fragment {

    Button mFind;
    EditText mFrom, mTo;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_bus, container, false);

        init(view);
        eventListener();

        return view;
    }

    /*
    * Initialize UI elements
    * */
    void init(View v) {


        mFind = (Button) v.findViewById(R.id.find);
        mFrom = (EditText) v.findViewById(R.id.edtFrom);
        mTo = (EditText) v.findViewById(R.id.edtTo);
    }

    /*
    * Click event handler
    * */
    private void eventListener() {


        mFind.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // Snackbar.make(v, "Coming Soon", Snackbar.LENGTH_LONG).show();
                Intent in = new Intent(getActivity(), RouteListActivity.class);
                startActivity(in);
            }
        });

        mFrom.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                try {
                    Intent intent =
                            new PlaceAutocomplete.IntentBuilder(PlaceAutocomplete.MODE_OVERLAY)
                                    .build(getActivity());
                    startActivityForResult(intent, 1);
                } catch (GooglePlayServicesRepairableException e) {
                    // TODO: Handle the error.
                } catch (GooglePlayServicesNotAvailableException e) {
                    // TODO: Handle the error.
                }
            }
        });

        mTo.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                try {
                    Intent intent =
                            new PlaceAutocomplete.IntentBuilder(PlaceAutocomplete.MODE_OVERLAY)
                                    .build(getActivity());
                    startActivityForResult(intent, 2);
                } catch (GooglePlayServicesRepairableException e) {
                    // TODO: Handle the error.
                } catch (GooglePlayServicesNotAvailableException e) {
                    // TODO: Handle the error.
                }
            }
        });
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == 1) {
            if (resultCode == getActivity().RESULT_OK) {
                Place place = PlaceAutocomplete.getPlace(getActivity(), data);
                Log.i("FIND", "Place: " + place.getName());
                mFrom.setText(place.getName());
            } else if (resultCode == PlaceAutocomplete.RESULT_ERROR) {
                Status status = PlaceAutocomplete.getStatus(getActivity(), data);
                // TODO: Handle the error.
                Log.i("MAP", status.getStatusMessage());

            } else if (resultCode == getActivity().RESULT_CANCELED) {
                // The user canceled the operation.
            }
        }
        if (requestCode == 2) {
            if (resultCode == getActivity().RESULT_OK) {
                Place place = PlaceAutocomplete.getPlace(getActivity(), data);
                Log.i("FIND", "Place: " + place.getName());
                mTo.setText(place.getName());
            } else if (resultCode == PlaceAutocomplete.RESULT_ERROR) {
                Status status = PlaceAutocomplete.getStatus(getActivity(), data);
                // TODO: Handle the error.
                Log.i("MAP", status.getStatusMessage());

            } else if (resultCode == getActivity().RESULT_CANCELED) {
                // The user canceled the operation.
            }
        }
    }
}

Add Internet permission in your manifest.

<uses-permission android:name="android.permission.INTERNET" />
 <meta-data
            android:name="com.google.android.geo.API_KEY"
            android:value="key"/>

        <meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />
        <uses-feature
            android:glEsVersion="0x00020000"
            android:required="true"/>