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d6a371a Feb 6, 2018
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executable file 246 lines (214 sloc) 9.4 KB
/*
* 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.example.mapdemo;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.UiSettings;
import android.Manifest;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.CheckBox;
import android.widget.Toast;
/**
* This shows how UI settings can be toggled.
*/
public class UiSettingsDemoActivity extends AppCompatActivity implements OnMapReadyCallback {
private GoogleMap mMap;
private UiSettings mUiSettings;
private CheckBox mMyLocationButtonCheckbox;
private CheckBox mMyLocationLayerCheckbox;
private static final int MY_LOCATION_PERMISSION_REQUEST_CODE = 1;
private static final int LOCATION_LAYER_PERMISSION_REQUEST_CODE = 2;
/**
* Flag indicating whether a requested permission has been denied after returning in
* {@link #onRequestPermissionsResult(int, String[], int[])}.
*/
private boolean mLocationPermissionDenied = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.ui_settings_demo);
mMyLocationButtonCheckbox = (CheckBox) findViewById(R.id.mylocationbutton_toggle);
mMyLocationLayerCheckbox = (CheckBox) findViewById(R.id.mylocationlayer_toggle);
SupportMapFragment mapFragment =
(SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
/**
* Returns whether the checkbox with the given id is checked.
*/
private boolean isChecked(int id) {
return ((CheckBox) findViewById(id)).isChecked();
}
@Override
public void onMapReady(GoogleMap map) {
mMap = map;
mUiSettings = mMap.getUiSettings();
// Keep the UI Settings state in sync with the checkboxes.
mUiSettings.setZoomControlsEnabled(isChecked(R.id.zoom_buttons_toggle));
mUiSettings.setCompassEnabled(isChecked(R.id.compass_toggle));
mUiSettings.setMyLocationButtonEnabled(isChecked(R.id.mylocationbutton_toggle));
mMap.setMyLocationEnabled(isChecked(R.id.mylocationlayer_toggle));
mUiSettings.setScrollGesturesEnabled(isChecked(R.id.scroll_toggle));
mUiSettings.setZoomGesturesEnabled(isChecked(R.id.zoom_gestures_toggle));
mUiSettings.setTiltGesturesEnabled(isChecked(R.id.tilt_toggle));
mUiSettings.setRotateGesturesEnabled(isChecked(R.id.rotate_toggle));
}
/**
* Checks if the map is ready (which depends on whether the Google Play services APK is
* available. This should be called prior to calling any methods on GoogleMap.
*/
private boolean checkReady() {
if (mMap == null) {
Toast.makeText(this, R.string.map_not_ready, Toast.LENGTH_SHORT).show();
return false;
}
return true;
}
public void setZoomButtonsEnabled(View v) {
if (!checkReady()) {
return;
}
// Enables/disables the zoom controls (+/- buttons in the bottom-right of the map for LTR
// locale or bottom-left for RTL locale).
mUiSettings.setZoomControlsEnabled(((CheckBox) v).isChecked());
}
public void setCompassEnabled(View v) {
if (!checkReady()) {
return;
}
// Enables/disables the compass (icon in the top-left for LTR locale or top-right for RTL
// locale that indicates the orientation of the map).
mUiSettings.setCompassEnabled(((CheckBox) v).isChecked());
}
public void setMyLocationButtonEnabled(View v) {
if (!checkReady()) {
return;
}
// Enables/disables the my location button (this DOES NOT enable/disable the my location
// dot/chevron on the map). The my location button will never appear if the my location
// layer is not enabled.
// First verify that the location permission has been granted.
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
mUiSettings.setMyLocationButtonEnabled(mMyLocationButtonCheckbox.isChecked());
} else {
// Uncheck the box and request missing location permission.
mMyLocationButtonCheckbox.setChecked(false);
requestLocationPermission(MY_LOCATION_PERMISSION_REQUEST_CODE);
}
}
public void setMyLocationLayerEnabled(View v) {
if (!checkReady()) {
return;
}
// Enables/disables the my location layer (i.e., the dot/chevron on the map). If enabled, it
// will also cause the my location button to show (if it is enabled); if disabled, the my
// location button will never show.
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
mMap.setMyLocationEnabled(mMyLocationLayerCheckbox.isChecked());
} else {
// Uncheck the box and request missing location permission.
mMyLocationLayerCheckbox.setChecked(false);
PermissionUtils.requestPermission(this, LOCATION_LAYER_PERMISSION_REQUEST_CODE,
Manifest.permission.ACCESS_FINE_LOCATION, false);
}
}
public void setScrollGesturesEnabled(View v) {
if (!checkReady()) {
return;
}
// Enables/disables scroll gestures (i.e. panning the map).
mUiSettings.setScrollGesturesEnabled(((CheckBox) v).isChecked());
}
public void setZoomGesturesEnabled(View v) {
if (!checkReady()) {
return;
}
// Enables/disables zoom gestures (i.e., double tap, pinch & stretch).
mUiSettings.setZoomGesturesEnabled(((CheckBox) v).isChecked());
}
public void setTiltGesturesEnabled(View v) {
if (!checkReady()) {
return;
}
// Enables/disables tilt gestures.
mUiSettings.setTiltGesturesEnabled(((CheckBox) v).isChecked());
}
public void setRotateGesturesEnabled(View v) {
if (!checkReady()) {
return;
}
// Enables/disables rotate gestures.
mUiSettings.setRotateGesturesEnabled(((CheckBox) v).isChecked());
}
/**
* Requests the fine location permission. If a rationale with an additional explanation should
* be shown to the user, displays a dialog that triggers the request.
*/
public void requestLocationPermission(int requestCode) {
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.ACCESS_FINE_LOCATION)) {
// Display a dialog with rationale.
PermissionUtils.RationaleDialog
.newInstance(requestCode, false).show(
getSupportFragmentManager(), "dialog");
} else {
// Location permission has not been granted yet, request it.
PermissionUtils.requestPermission(this, requestCode,
Manifest.permission.ACCESS_FINE_LOCATION, false);
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
@NonNull int[] grantResults) {
if (requestCode == MY_LOCATION_PERMISSION_REQUEST_CODE) {
// Enable the My Location button if the permission has been granted.
if (PermissionUtils.isPermissionGranted(permissions, grantResults,
Manifest.permission.ACCESS_FINE_LOCATION)) {
mUiSettings.setMyLocationButtonEnabled(true);
mMyLocationButtonCheckbox.setChecked(true);
} else {
mLocationPermissionDenied = true;
}
} else if (requestCode == LOCATION_LAYER_PERMISSION_REQUEST_CODE) {
// Enable the My Location layer if the permission has been granted.
if (PermissionUtils.isPermissionGranted(permissions, grantResults,
Manifest.permission.ACCESS_FINE_LOCATION)) {
mMap.setMyLocationEnabled(true);
mMyLocationLayerCheckbox.setChecked(true);
} else {
mLocationPermissionDenied = true;
}
}
}
@Override
protected void onResumeFragments() {
super.onResumeFragments();
if (mLocationPermissionDenied) {
PermissionUtils.PermissionDeniedDialog
.newInstance(false).show(getSupportFragmentManager(), "dialog");
mLocationPermissionDenied = false;
}
}
}