我是Android开发的新手，我一直试图在我的应用程序中显示一段时间。我终于设法做到了，但我想用一些指定的选项显示它，如缩放级别，位置等，但证明是困难的。
以下是我的.xml文件
<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment"/>
以下是我的.java文件
package com.fourapps.cabkonnect;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import android.location.Location;
import android.graphics.Color;
import com.google.android.gms.maps.model.CameraPosition;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import com.google.android.gms.maps.model.PolylineOptions;
/**
* Created by nanakay on 6/6/13.
*/
public class Home extends FragmentActivity {
GoogleMap map;
private static final LatLng GOLDEN_GATE_BRIDGE = new LatLng(37.828891,-122.485884);
private static final LatLng APPLE = new LatLng(37.3325004578, -122.03099823);
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.home);
map = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
if (map == null) {
Toast.makeText(this, "Google maps not available", Toast.LENGTH_LONG).show();
}
}
}
地图正在显示，但我想用自己的选项显示它。 如果有人可以提供帮助，我会很高兴。感谢
答案 0 :(得分：2)
首先要获取当前位置：
private Location mCurrentLocation;
mCurrentLocation = mLocationClient.getLastLocation();
阅读here了解详情。
然后您可以使用以下命令设置该位置的动画：
LatLng myLaLn = new LatLng(mCurrentLocation.getLatitude(), mCurrentLocation.getLongitude());
CameraPosition camPos = new CameraPosition.Builder().target(myLaLn)
.zoom(15)
.bearing(45)
.tilt(70)
.build();
CameraUpdate camUpd3 = CameraUpdateFactory.newCameraPosition(camPos);
map.animateCamera(camUpd3);
我给你一个简单但完整的例子来显示地图和当前位置：
public class MainActivity extends FragmentActivity implements
GooglePlayServicesClient.ConnectionCallbacks,
GooglePlayServicesClient.OnConnectionFailedListener {
private final static int CONNECTION_FAILURE_RESOLUTION_REQUEST = 9000;
private LocationClient mLocationClient;
private Location mCurrentLocation;
private GoogleMap map;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.map);
}
@Override
protected void onResume() {
super.onResume();
setUpMapIfNeeded();
setUpLocationClientIfNeeded();
mLocationClient.connect();
}
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the
// map.
if (map == null) {
// Try to obtain the map from the SupportMapFragment.
map = ((SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map)).getMap();
// Check if we were successful in obtaining the map.
if (map == null) {
Toast.makeText(this, "Google maps not available",
Toast.LENGTH_LONG).show();
}
}
}
private void setUpLocationClientIfNeeded() {
if (mLocationClient == null) {
Toast.makeText(getApplicationContext(), "Waiting for location",
Toast.LENGTH_SHORT).show();
mLocationClient = new LocationClient(getApplicationContext(), this, // ConnectionCallbacks
this); // OnConnectionFailedListener
}
}
@Override
public void onPause() {
super.onPause();
if (mLocationClient != null) {
mLocationClient.disconnect();
}
}
/*
* Called by Location Services when the request to connect the client
* finishes successfully. At this point, you can request the current
* location or start periodic updates
*/
@Override
public void onConnected(Bundle dataBundle) {
mCurrentLocation = mLocationClient.getLastLocation();
if (mCurrentLocation != null) {
Toast.makeText(getApplicationContext(), "Found!",
Toast.LENGTH_SHORT).show();
centerInLoc();
}
}
private void centerInLoc() {
LatLng myLaLn = new LatLng(mCurrentLocation.getLatitude(),
mCurrentLocation.getLongitude());
CameraPosition camPos = new CameraPosition.Builder().target(myLaLn)
.zoom(15).bearing(45).tilt(70).build();
CameraUpdate camUpd3 = CameraUpdateFactory.newCameraPosition(camPos);
map.animateCamera(camUpd3);
MarkerOptions markerOpts = new MarkerOptions().position(myLaLn).title(
"my Location");
map.addMarker(markerOpts);
}
/*
* Called by Location Services if the connection to the location client
* drops because of an error.
*/
@Override
public void onDisconnected() {
// Display the connection status
Toast.makeText(this, "Disconnected. Please re-connect.",
Toast.LENGTH_SHORT).show();
}
/*
* Called by Location Services if the attempt to Location Services fails.
*/
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
/*
* Google Play services can resolve some errors it detects. If the error
* has a resolution, try sending an Intent to start a Google Play
* services activity that can resolve error.
*/
if (connectionResult.hasResolution()) {
try {
// Start an Activity that tries to resolve the error
connectionResult.startResolutionForResult(this,
CONNECTION_FAILURE_RESOLUTION_REQUEST);
/*
* Thrown if Google Play services canceled the original
* PendingIntent
*/
} catch (IntentSender.SendIntentException e) {
// Log the error
e.printStackTrace();
}
} else {
/*
* If no resolution is available
*/
Log.e("Home", Integer.toString(connectionResult.getErrorCode()));
}
}
}
注1：我简单地省略了“检查Google Play服务”部分，但应将其作为一种良好做法添加。
注意2：您需要google-play-services_lib项目并从您的项目中引用它。
您可以在android here
中找到有关与Google地图进行互动的所有信息从上面引用的google地图文档中，只举几个例子：
缩放控件：
Maps API提供了内置的缩放控件，显示在地图的右下角。这些默认情况下已启用，但可以通过调用 UiSettings.setZoomControlsEnabled(boolean)来禁用。
我的位置按钮：
仅当启用“我的位置”图层时，“我的位置”按钮才会显示在屏幕的右上角。当用户单击该按钮时，如果当前已知用户的位置，则摄像机会设置动画以关注用户的当前位置。点击还会触发GoogleMap.OnMyLocationButtonClickListener。您可以通过调用 UiSettings.setMyLocationButtonEnabled(boolean)来禁用该按钮。
添加标记：
以下示例演示了如何向地图添加标记。标记在坐标0,0处创建，并在单击时在infowindow中显示字符串“Hello world”。
private GoogleMap mMap;
mMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
mMap.addMarker(new MarkerOptions()
.position(new LatLng(0, 0))
.title("Hello world"));