Java tutorial
/* * Copyright (C) 2011 University of Washington * * 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 org.iransoil.collect.android.activities; import java.text.DecimalFormat; import java.util.List; import org.iransoil.collect.android.R; import android.Manifest; import android.content.Context; import android.content.Intent; import android.content.pm.PackageManager; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Point; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.os.Bundle; import android.support.v4.app.ActivityCompat; import android.view.View; import android.view.View.OnClickListener; import android.view.Window; import android.widget.Button; import android.widget.FrameLayout; import android.widget.RelativeLayout.LayoutParams; import android.widget.TextView; import android.widget.Toast; import org.iransoil.collect.android.application.Collect; import org.iransoil.collect.android.utilities.InfoLogger; import org.iransoil.collect.android.widgets.GeoPointWidget; import com.google.android.maps.GeoPoint; import com.google.android.maps.MapActivity; import com.google.android.maps.MapController; import com.google.android.maps.MapView; import com.google.android.maps.MyLocationOverlay; import com.google.android.maps.Overlay; public class GeoPointMapActivitySdk7 extends MapActivity implements LocationListener { private static final String LOCATION_COUNT = "locationCount"; private MapView mMapView; private TextView mLocationStatus; private MapController mMapController; private LocationManager mLocationManager; private Overlay mLocationOverlay; private Overlay mGeoPointOverlay; private GeoPoint mGeoPoint; private Location mLocation; private Button mAcceptLocation; private Button mCancelLocation; private boolean mCaptureLocation = true; private Button mShowLocation; private boolean mGPSOn = false; private boolean mNetworkOn = false; private double mLocationAccuracy; private int mLocationCount = 0; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); if (savedInstanceState != null) { mLocationCount = savedInstanceState.getInt(LOCATION_COUNT); } requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.geopoint_layout_sdk7); Intent intent = getIntent(); mLocationAccuracy = GeoPointWidget.DEFAULT_LOCATION_ACCURACY; if (intent != null && intent.getExtras() != null) { if (intent.hasExtra(GeoPointWidget.LOCATION)) { double[] location = intent.getDoubleArrayExtra(GeoPointWidget.LOCATION); mGeoPoint = new GeoPoint((int) (location[0] * 1E6), (int) (location[1] * 1E6)); } if (intent.hasExtra(GeoPointWidget.ACCURACY_THRESHOLD)) { mLocationAccuracy = intent.getDoubleExtra(GeoPointWidget.ACCURACY_THRESHOLD, GeoPointWidget.DEFAULT_LOCATION_ACCURACY); } mCaptureLocation = !intent.getBooleanExtra(GeoPointWidget.READ_ONLY, false); } /** * Add the MapView dynamically to the placeholding frame so as to not * incur the wrath of Android Lint... */ FrameLayout frame = (FrameLayout) findViewById(R.id.mapview_placeholder); String apiKey = "017Xo9E6R7WmcCITvo-lU2V0ERblKPqCcguwxSQ"; // String apiKey = "0wsgFhRvVBLVpgaFzmwaYuqfU898z_2YtlKSlkg"; mMapView = new MapView(this, apiKey); mMapView.setClickable(true); mMapView.setId(R.id.mapview); LayoutParams p = new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT); frame.addView(mMapView, p); mCancelLocation = (Button) findViewById(R.id.cancel_location); mCancelLocation.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Collect.getInstance().getActivityLogger().logInstanceAction(this, "cancelLocation", "cancel"); finish(); } }); mMapController = mMapView.getController(); mLocationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); mMapView.setBuiltInZoomControls(true); mMapView.setSatellite(false); mMapController.setZoom(16); // make sure we have a good location provider before continuing List<String> providers = mLocationManager.getProviders(true); for (String provider : providers) { if (provider.equalsIgnoreCase(LocationManager.GPS_PROVIDER)) { mGPSOn = true; } if (provider.equalsIgnoreCase(LocationManager.NETWORK_PROVIDER)) { mNetworkOn = true; } } if (!mGPSOn && !mNetworkOn) { Toast.makeText(getBaseContext(), getString(R.string.provider_disabled_error), Toast.LENGTH_SHORT) .show(); finish(); } if (mGPSOn) { Location loc = mLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); if (loc != null) { InfoLogger.geolog("GeoPointMapActivity: " + System.currentTimeMillis() + " lastKnownLocation(GPS) lat: " + loc.getLatitude() + " long: " + loc.getLongitude() + " acc: " + loc.getAccuracy()); } else { InfoLogger.geolog("GeoPointMapActivity: " + System.currentTimeMillis() + " lastKnownLocation(GPS) null location"); } } if (mNetworkOn) { if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { // TODO: Consider calling // ActivityCompat#requestPermissions // here to request the missing permissions, and then overriding // public void onRequestPermissionsResult(int requestCode, String[] permissions, // int[] grantResults) // to handle the case where the user grants the permission. See the documentation // for ActivityCompat#requestPermissions for more details. return; } Location loc = mLocationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER); if (loc != null) { InfoLogger.geolog("GeoPointMapActivity: " + System.currentTimeMillis() + " lastKnownLocation(Network) lat: " + loc.getLatitude() + " long: " + loc.getLongitude() + " acc: " + loc.getAccuracy()); } else { InfoLogger.geolog("GeoPointMapActivity: " + System.currentTimeMillis() + " lastKnownLocation(Network) null location"); } } mLocationOverlay = new MyLocationOverlay(this, mMapView); mMapView.getOverlays().add(mLocationOverlay); if (mCaptureLocation) { mLocationStatus = (TextView) findViewById(R.id.location_status); mAcceptLocation = (Button) findViewById(R.id.accept_location); mAcceptLocation.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Collect.getInstance().getActivityLogger().logInstanceAction(this, "acceptLocation", "OK"); returnLocation(); } }); } else { mGeoPointOverlay = new Marker(mGeoPoint); mMapView.getOverlays().add(mGeoPointOverlay); ((Button) findViewById(R.id.accept_location)).setVisibility(View.GONE); ((TextView) findViewById(R.id.location_status)).setVisibility(View.GONE); mShowLocation = ((Button) findViewById(R.id.show_location)); mShowLocation.setVisibility(View.VISIBLE); mShowLocation.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Collect.getInstance().getActivityLogger().logInstanceAction(this, "showLocation", "onClick"); mMapController.animateTo(mGeoPoint); } }); } if (mGeoPoint != null) { mMapController.animateTo(mGeoPoint); } } @Override protected void onStart() { super.onStart(); Collect.getInstance().getActivityLogger().logOnStart(this); } @Override protected void onStop() { Collect.getInstance().getActivityLogger().logOnStop(this); super.onStop(); } private void returnLocation() { if (mLocation != null) { Intent i = new Intent(); i.putExtra(FormEntryActivity.LOCATION_RESULT, mLocation.getLatitude() + " " + mLocation.getLongitude() + " " + mLocation.getAltitude() + " " + mLocation.getAccuracy()); setResult(RESULT_OK, i); } finish(); } private String truncateFloat(float f) { return new DecimalFormat("#.##").format(f); } @Override protected void onPause() { super.onPause(); mLocationManager.removeUpdates(this); ((MyLocationOverlay) mLocationOverlay).disableMyLocation(); } @Override protected void onResume() { super.onResume(); if (mCaptureLocation) { ((MyLocationOverlay) mLocationOverlay).enableMyLocation(); if (mGPSOn) { mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this); } if (mNetworkOn) { mLocationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, this); } } } @Override protected boolean isRouteDisplayed() { return false; } @Override public void onLocationChanged(Location location) { if (mCaptureLocation) { mLocation = location; if (mLocation != null) { // Bug report: cached GeoPoint is being returned as the first value. // Wait for the 2nd value to be returned, which is hopefully not cached? ++mLocationCount; InfoLogger.geolog("GeoPointMapActivity: " + System.currentTimeMillis() + " onLocationChanged(" + mLocationCount + ") lat: " + mLocation.getLatitude() + " long: " + mLocation.getLongitude() + " acc: " + mLocation.getAccuracy()); if (mLocationCount > 1) { mLocationStatus.setText(getString(R.string.location_provider_accuracy, mLocation.getProvider(), truncateFloat(mLocation.getAccuracy()))); mGeoPoint = new GeoPoint((int) (mLocation.getLatitude() * 1E6), (int) (mLocation.getLongitude() * 1E6)); mMapController.animateTo(mGeoPoint); if (mLocation.getAccuracy() <= mLocationAccuracy) { returnLocation(); } } } else { InfoLogger.geolog("GeoPointMapActivity: " + System.currentTimeMillis() + " onLocationChanged(" + mLocationCount + ") null location"); } } } @Override public void onProviderDisabled(String provider) { } @Override public void onProviderEnabled(String provider) { } @Override public void onStatusChanged(String provider, int status, Bundle extras) { } class Marker extends Overlay { GeoPoint gp = null; public Marker(GeoPoint gp) { super(); this.gp = gp; } @Override public void draw(Canvas canvas, MapView mapView, boolean shadow) { super.draw(canvas, mapView, shadow); Point screenPoint = new Point(); mMapView.getProjection().toPixels(gp, screenPoint); canvas.drawBitmap( BitmapFactory.decodeResource(getResources(), R.drawable.ic_maps_indicator_current_position), screenPoint.x, screenPoint.y - 8, null); // -8 as image is 16px high } } }