Android example source code file (Panoramio.java)

This example Android source code file (Panoramio.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

android, button, content, framelayout, geopoint, imagemanager, intent, mapactivity, maps, mapview, million, mylocationoverlay, onclicklistener, override, panoramio_dummyapikey, runnable, ui, view, widget

The Panoramio.java Android example source code

/*
 * Copyright (C) 2008 Google Inc.
 *
 * 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.android.panoramio;

import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;
import com.google.android.maps.MyLocationOverlay;

import android.content.Intent;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.FrameLayout;


/**
 * Activity which lets the user select a search area
 *
 */
public class Panoramio extends MapActivity implements OnClickListener {
    private MapView mMapView;
    private MyLocationOverlay mMyLocationOverlay;
    private ImageManager mImageManager;
    
    
    public static final int MILLION = 1000000;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        setContentView(R.layout.main);
        
        mImageManager = ImageManager.getInstance(this);
        
        FrameLayout frame = (FrameLayout) findViewById(R.id.frame);
        Button goButton = (Button) findViewById(R.id.go);
        goButton.setOnClickListener(this);
       
        // Add the map view to the frame
        mMapView = new MapView(this, "Panoramio_DummyAPIKey");
        frame.addView(mMapView, 
                new FrameLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));

        // Create an overlay to show current location
        mMyLocationOverlay = new MyLocationOverlay(this, mMapView);
        mMyLocationOverlay.runOnFirstFix(new Runnable() { public void run() {
            mMapView.getController().animateTo(mMyLocationOverlay.getMyLocation());
        }});

        mMapView.getOverlays().add(mMyLocationOverlay);
        mMapView.getController().setZoom(15);
        mMapView.setClickable(true);
        mMapView.setEnabled(true);
        mMapView.setSatellite(true);
        
        addZoomControls(frame);
    }

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

    @Override
    protected void onStop() {
        mMyLocationOverlay.disableMyLocation();
        super.onStop();
    }

    /**
     * Add zoom controls to our frame layout
     */
    private void addZoomControls(FrameLayout frame) {
        // Get the zoom controls and add them to the bottom of the map
        View zoomControls = mMapView.getZoomControls();

        FrameLayout.LayoutParams p = 
            new FrameLayout.LayoutParams(LayoutParams.WRAP_CONTENT,
                LayoutParams.WRAP_CONTENT, Gravity.BOTTOM + Gravity.CENTER_HORIZONTAL);
        frame.addView(zoomControls, p);
    }
    
    @Override
    protected boolean isRouteDisplayed() {
        return false;
    }
    
    /**
     * Starts a new search when the user clicks the search button.
     */
    public void onClick(View view) {
        // Get the search area
        int latHalfSpan = mMapView.getLatitudeSpan() >> 1;
        int longHalfSpan = mMapView.getLongitudeSpan() >> 1;
        
        // Remember how the map was displayed so we can show it the same way later
        GeoPoint center = mMapView.getMapCenter();
        int zoom = mMapView.getZoomLevel();
        int latitudeE6 = center.getLatitudeE6();
        int longitudeE6 = center.getLongitudeE6();

        Intent i = new Intent(this, ImageList.class);
        i.putExtra(ImageManager.ZOOM_EXTRA, zoom);
        i.putExtra(ImageManager.LATITUDE_E6_EXTRA, latitudeE6);
        i.putExtra(ImageManager.LONGITUDE_E6_EXTRA, longitudeE6);

        float minLong = ((float) (longitudeE6 - longHalfSpan)) / MILLION;
        float maxLong = ((float) (longitudeE6 + longHalfSpan)) / MILLION;

        float minLat = ((float) (latitudeE6 - latHalfSpan)) / MILLION;
        float maxLat = ((float) (latitudeE6 + latHalfSpan)) / MILLION;

        mImageManager.clear();
        
        // Start downloading
        mImageManager.load(minLong, maxLong, minLat, maxLat);
        
        // Show results
        startActivity(i);
    }
}