EventsDemoActivity.java

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.mcommerce.sample.android.chapter09.googleMap;

import android.os.Bundle;
import android.widget.TextView;

import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.GoogleMap.OnCameraChangeListener;
import com.google.android.gms.maps.GoogleMap.OnMapClickListener;
import com.google.android.gms.maps.GoogleMap.OnMapLongClickListener;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.CameraPosition;
import com.google.android.gms.maps.model.LatLng;
import com.google.mcommerce.sample.android.R;

/**
 * This shows how to listen to some {@link GoogleMap} events.
 */
public class EventsDemoActivity extends android.support.v4.app.FragmentActivity
        implements OnMapClickListener, OnMapLongClickListener, OnCameraChangeListener {

    private GoogleMap mMap;
    private TextView mTapTextView;
    private TextView mCameraTextView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.c09_events_demo);

        mTapTextView = (TextView) findViewById(R.id.tap_text);
        mCameraTextView = (TextView) findViewById(R.id.camera_text);

        setUpMapIfNeeded();
    }

    @Override
    protected void onResume() {
        super.onResume();
        setUpMapIfNeeded();
    }

    private void setUpMapIfNeeded() {
        if (mMap == null) {
            mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
                    .getMap();
            if (mMap != null) {
                setUpMap();
            }
        }
    }

    private void setUpMap() {
        mMap.setOnMapClickListener(this);
        mMap.setOnMapLongClickListener(this);
        mMap.setOnCameraChangeListener(this);
    }

    @Override
    public void onMapClick(LatLng point) {
        mTapTextView.setText("tapped, point=" + point);
    }

    @Override
    public void onMapLongClick(LatLng point) {
        mTapTextView.setText("long pressed, point=" + point);
    }

    @Override
    public void onCameraChange(final CameraPosition position) {
        mCameraTextView.setText(position.toString());
    }
}