Java tutorial
/* * 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.cyrilmottier.android.polaris2demo; import com.cyrilmottier.polaris2.maps.CameraUpdateFactory; import com.cyrilmottier.polaris2.maps.GoogleMap; import com.cyrilmottier.polaris2.maps.GoogleMap.InfoWindowAdapter; import com.cyrilmottier.polaris2.maps.GoogleMap.OnInfoWindowClickListener; import com.cyrilmottier.polaris2.maps.GoogleMap.OnMarkerClickListener; import com.cyrilmottier.polaris2.maps.GoogleMap.OnMarkerDragListener; import com.cyrilmottier.polaris2.maps.Projection; import com.cyrilmottier.polaris2.maps.SupportMapFragment; import com.cyrilmottier.polaris2.maps.model.BitmapDescriptorFactory; import com.cyrilmottier.polaris2.maps.model.LatLng; import com.cyrilmottier.polaris2.maps.model.LatLngBounds; import com.cyrilmottier.polaris2.maps.model.Marker; import com.cyrilmottier.polaris2.maps.model.MarkerOptions; import android.annotation.SuppressLint; import android.graphics.Color; import android.graphics.Point; import android.os.Build; import android.os.Bundle; import android.os.Handler; import android.os.SystemClock; import android.support.v4.app.FragmentActivity; import android.text.SpannableString; import android.text.style.ForegroundColorSpan; import android.view.View; import android.view.ViewTreeObserver.OnGlobalLayoutListener; import android.view.animation.BounceInterpolator; import android.view.animation.Interpolator; import android.widget.ImageView; import android.widget.RadioGroup; import android.widget.TextView; import android.widget.Toast; /** * This shows how to place markers on a map. */ public class MarkerDemoActivity extends FragmentActivity implements OnMarkerClickListener, OnInfoWindowClickListener, OnMarkerDragListener { private static final LatLng BRISBANE = new LatLng(-27.47093, 153.0235); private static final LatLng MELBOURNE = new LatLng(-37.81319, 144.96298); private static final LatLng SYDNEY = new LatLng(-33.87365, 151.20689); private static final LatLng ADELAIDE = new LatLng(-34.92873, 138.59995); private static final LatLng PERTH = new LatLng(-31.952854, 115.857342); /** * Demonstrates customizing the info window and/or its contents. */ class CustomInfoWindowAdapter implements InfoWindowAdapter { private final RadioGroup mOptions; // These a both viewgroups containing an ImageView with id "badge" and two TextViews with id // "title" and "snippet". private final View mWindow; private final View mContents; CustomInfoWindowAdapter() { mWindow = getLayoutInflater().inflate(R.layout.custom_info_window, null); mContents = getLayoutInflater().inflate(R.layout.custom_info_contents, null); mOptions = (RadioGroup) findViewById(R.id.custom_info_window_options); } @Override public View getInfoWindow(Marker marker) { if (mOptions.getCheckedRadioButtonId() != R.id.custom_info_window) { // This means that getInfoContents will be called. return null; } render(marker, mWindow); return mWindow; } @Override public View getInfoContents(Marker marker) { if (mOptions.getCheckedRadioButtonId() != R.id.custom_info_contents) { // This means that the default info contents will be used. return null; } render(marker, mContents); return mContents; } private void render(Marker marker, View view) { int badge; // Use the equals() method on a Marker to check for equals. Do not use ==. if (marker.equals(mBrisbane)) { badge = R.drawable.badge_qld; } else if (marker.equals(mAdelaide)) { badge = R.drawable.badge_sa; } else if (marker.equals(mSydney)) { badge = R.drawable.badge_nsw; } else if (marker.equals(mMelbourne)) { badge = R.drawable.badge_victoria; } else if (marker.equals(mPerth)) { badge = R.drawable.badge_wa; } else { // Passing 0 to setImageResource will clear the image view. badge = 0; } ((ImageView) view.findViewById(R.id.badge)).setImageResource(badge); String title = marker.getTitle(); TextView titleUi = ((TextView) view.findViewById(R.id.title)); if (title != null) { // Spannable string allows us to edit the formatting of the text. SpannableString titleText = new SpannableString(title); titleText.setSpan(new ForegroundColorSpan(Color.RED), 0, titleText.length(), 0); titleUi.setText(titleText); } else { titleUi.setText(""); } String snippet = marker.getSnippet(); TextView snippetUi = ((TextView) view.findViewById(R.id.snippet)); if (snippet != null && snippet.length() > 12) { SpannableString snippetText = new SpannableString(snippet); snippetText.setSpan(new ForegroundColorSpan(Color.MAGENTA), 0, 10, 0); snippetText.setSpan(new ForegroundColorSpan(Color.BLUE), 12, snippet.length(), 0); snippetUi.setText(snippetText); } else { snippetUi.setText(""); } } } private GoogleMap mMap; private Marker mPerth; private Marker mSydney; private Marker mBrisbane; private Marker mAdelaide; private Marker mMelbourne; private TextView mTopText; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.marker_demo); mTopText = (TextView) findViewById(R.id.top_text); setUpMapIfNeeded(); } @Override protected void onResume() { super.onResume(); setUpMapIfNeeded(); } private void setUpMapIfNeeded() { // Do a null check to confirm that we have not already instantiated the map. if (mMap == null) { // Try to obtain the map wrap the SupportMapFragment. mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getPolarisMap(); // Check if we were successful in obtaining the map. if (mMap != null) { setUpMap(); } } } private void setUpMap() { // Hide the zoom controls as the button panel will cover it. mMap.getUiSettings().setZoomControlsEnabled(false); // Add lots of markers to the map. addMarkersToMap(); // Setting an info window adapter allows us to change the both the contents and look of the // info window. mMap.setInfoWindowAdapter(new CustomInfoWindowAdapter()); // Set listeners for marker events. See the bottom of this class for their behavior. mMap.setOnMarkerClickListener(this); mMap.setOnInfoWindowClickListener(this); mMap.setOnMarkerDragListener(this); // Pan to see all markers in view. // Cannot zoom to bounds until the map has a size. final View mapView = getSupportFragmentManager().findFragmentById(R.id.map).getView(); if (mapView.getViewTreeObserver().isAlive()) { mapView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() { @SuppressWarnings("deprecation") // We use the new method when supported @SuppressLint("NewApi") // We check which build version we are using. @Override public void onGlobalLayout() { LatLngBounds bounds = new LatLngBounds.Builder().include(PERTH).include(SYDNEY) .include(ADELAIDE).include(BRISBANE).include(MELBOURNE).build(); if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) { mapView.getViewTreeObserver().removeGlobalOnLayoutListener(this); } else { mapView.getViewTreeObserver().removeOnGlobalLayoutListener(this); } mMap.moveCamera(CameraUpdateFactory.newLatLngBounds(bounds, 50)); } }); } } private void addMarkersToMap() { // Uses a colored icon. mBrisbane = mMap .addMarker(new MarkerOptions().position(BRISBANE).title("Brisbane").snippet("Population: 2,074,200") .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE))); // Uses a custom icon. mSydney = mMap.addMarker(new MarkerOptions().position(SYDNEY).title("Sydney") .snippet("Population: 4,627,300").icon(BitmapDescriptorFactory.fromResource(R.drawable.arrow))); // Creates a draggable marker. Long press to drag. mMelbourne = mMap.addMarker(new MarkerOptions().position(MELBOURNE).title("Melbourne") .snippet("Population: 4,137,400").draggable(true)); // A few more markers for good measure. mPerth = mMap .addMarker(new MarkerOptions().position(PERTH).title("Perth").snippet("Population: 1,738,800")); mAdelaide = mMap.addMarker( new MarkerOptions().position(ADELAIDE).title("Adelaide").snippet("Population: 1,213,000")); // Creates a marker rainbow demonstrating how to create default marker icons of different // hues (colors). int numMarkersInRainbow = 12; for (int i = 0; i < numMarkersInRainbow; i++) { mMap.addMarker(new MarkerOptions() .position(new LatLng(-30 + 10 * Math.sin(i * Math.PI / (numMarkersInRainbow - 1)), 135 - 10 * Math.cos(i * Math.PI / (numMarkersInRainbow - 1)))) .title("Marker " + i) .icon(BitmapDescriptorFactory.defaultMarker(i * 360 / numMarkersInRainbow))); } } private boolean checkReady() { if (mMap == null) { Toast.makeText(this, R.string.map_not_ready, Toast.LENGTH_SHORT).show(); return false; } return true; } /** * Called when the Clear button is clicked. */ public void onClearMap(View view) { if (!checkReady()) { return; } mMap.clear(); } /** * Called when the Reset button is clicked. */ public void onResetMap(View view) { if (!checkReady()) { return; } // Clear the map because we don't want duplicates of the markers. mMap.clear(); addMarkersToMap(); } // // Marker related listeners. // @Override public boolean onMarkerClick(final Marker marker) { // This causes the marker at Perth to bounce into position when it is clicked. if (marker.equals(mPerth)) { final Handler handler = new Handler(); final long start = SystemClock.uptimeMillis(); Projection proj = mMap.getProjection(); Point startPoint = proj.toScreenLocation(PERTH); startPoint.offset(0, -100); final LatLng startLatLng = proj.fromScreenLocation(startPoint); final long duration = 1500; final Interpolator interpolator = new BounceInterpolator(); handler.post(new Runnable() { @Override public void run() { long elapsed = SystemClock.uptimeMillis() - start; float t = interpolator.getInterpolation((float) elapsed / duration); double lng = t * PERTH.longitude + (1 - t) * startLatLng.longitude; double lat = t * PERTH.latitude + (1 - t) * startLatLng.latitude; marker.setPosition(new LatLng(lat, lng)); if (t < 1.0) { // Post again 16ms later. handler.postDelayed(this, 16); } } }); } // We return false to indicate that we have not consumed the event and that we wish // for the default behavior to occur (which is for the camera to move such that the // marker is centered and for the marker's info window to open, if it has one). return false; } @Override public void onInfoWindowClick(Marker marker) { Toast.makeText(getBaseContext(), "Click Info Window", Toast.LENGTH_SHORT).show(); } @Override public void onMarkerDragStart(Marker marker) { mTopText.setText("onMarkerDragStart"); } @Override public void onMarkerDragEnd(Marker marker) { mTopText.setText("onMarkerDragEnd"); } @Override public void onMarkerDrag(Marker marker) { mTopText.setText("onMarkerDrag. Current Position: " + marker.getPosition()); } }