/*
* 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.CameraUpdate;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.GoogleMap.CancelableCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.CameraPosition;
import com.google.android.gms.maps.model.LatLng;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.View;
import android.widget.CompoundButton;
import android.widget.SeekBar;
import android.widget.Toast;
/**
* This shows how to change the camera position for the map.
*/
public class CameraDemoActivity extends FragmentActivity {
/**
* The amount by which to scroll the camera. Note that this amount is in raw pixels, not dp
* (density-independent pixels).
*/
private static final int SCROLL_BY_PX = 100;
static final CameraPosition BONDI =
new CameraPosition.Builder().target(new LatLng(-33.891614, 151.276417))
.zoom(15.5f)
.bearing(300)
.tilt(50)
.build();
static final CameraPosition SYDNEY =
new CameraPosition.Builder().target(new LatLng(-33.87365, 151.20689))
.zoom(15.5f)
.bearing(0)
.tilt(25)
.build();
private GoogleMap mMap;
private CompoundButton mAnimateToggle;
private CompoundButton mCustomDurationToggle;
private SeekBar mCustomDurationBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.camera_demo);
mAnimateToggle = (CompoundButton) findViewById(R.id.animate);
mCustomDurationToggle = (CompoundButton) findViewById(R.id.duration_toggle);
mCustomDurationBar = (SeekBar) findViewById(R.id.duration_bar);
updateEnabledState();
setUpMapIfNeeded();
}
@Override
protected void onResume() {
super.onResume();
updateEnabledState();
setUpMapIfNeeded();
}
private void setUpMapIfNeeded() {
if (mMap == null) {
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
.getMap();
}
}
/**
* When the map is not ready the CameraUpdateFactory cannot be used. This should be called on
* all entry points that call methods on the Google Maps API.
*/
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 Go To Bondi button is clicked.
*/
public void onGoToBondi(View view) {
if (!checkReady()) {
return;
}
changeCamera(CameraUpdateFactory.newCameraPosition(BONDI));
}
/**
* Called when the Animate To Sydney button is clicked.
*/
public void onGoToSydney(View view) {
if (!checkReady()) {
return;
}
changeCamera(CameraUpdateFactory.newCameraPosition(SYDNEY), new CancelableCallback() {
@Override
public void onFinish() {
Toast.makeText(getBaseContext(), "Animation to Sydney complete", Toast.LENGTH_SHORT)
.show();
}
@Override
public void onCancel() {
Toast.makeText(getBaseContext(), "Animation to Sydney canceled", Toast.LENGTH_SHORT)
.show();
}
});
}
/**
* Called when the stop button is clicked.
*/
public void onStopAnimation(View view) {
if (!checkReady()) {
return;
}
mMap.stopAnimation();
}
/**
* Called when the zoom in button (the one with the +) is clicked.
*/
public void onZoomIn(View view) {
if (!checkReady()) {
return;
}
changeCamera(CameraUpdateFactory.zoomIn());
}
/**
* Called when the zoom out button (the one with the -) is clicked.
*/
public void onZoomOut(View view) {
if (!checkReady()) {
return;
}
changeCamera(CameraUpdateFactory.zoomOut());
}
/**
* Called when the left arrow button is clicked. This causes the camera to move to the left
*/
public void onScrollLeft(View view) {
if (!checkReady()) {
return;
}
changeCamera(CameraUpdateFactory.scrollBy(-SCROLL_BY_PX, 0));
}
/**
* Called when the right arrow button is clicked. This causes the camera to move to the right.
*/
public void onScrollRight(View view) {
if (!checkReady()) {
return;
}
changeCamera(CameraUpdateFactory.scrollBy(SCROLL_BY_PX, 0));
}
/**
* Called when the up arrow button is clicked. The causes the camera to move up.
*/
public void onScrollUp(View view) {
if (!checkReady()) {
return;
}
changeCamera(CameraUpdateFactory.scrollBy(0, -SCROLL_BY_PX));
}
/**
* Called when the down arrow button is clicked. This causes the camera to move down.
*/
public void onScrollDown(View view) {
if (!checkReady()) {
return;
}
changeCamera(CameraUpdateFactory.scrollBy(0, SCROLL_BY_PX));
}
/**
* Called when the animate button is toggled
*/
public void onToggleAnimate(View view) {
updateEnabledState();
}
/**
* Called when the custom duration checkbox is toggled
*/
public void onToggleCustomDuration(View view) {
updateEnabledState();
}
/**
* Update the enabled state of the custom duration controls.
*/
private void updateEnabledState() {
mCustomDurationToggle.setEnabled(mAnimateToggle.isChecked());
mCustomDurationBar
.setEnabled(mAnimateToggle.isChecked() && mCustomDurationToggle.isChecked());
}
private void changeCamera(CameraUpdate update) {
changeCamera(update, null);
}
/**
* Change the camera position by moving or animating the camera depending on the state of the
* animate toggle button.
*/
private void changeCamera(CameraUpdate update, CancelableCallback callback) {
if (mAnimateToggle.isChecked()) {
if (mCustomDurationToggle.isChecked()) {
int duration = mCustomDurationBar.getProgress();
// The duration must be strictly positive so we make it at least 1.
mMap.animateCamera(update, Math.max(duration, 1), callback);
} else {
mMap.animateCamera(update, callback);
}
} else {
mMap.moveCamera(update);
}
}
}