Android开发之高德地图实现定位

<!-- 申请必要的权限-->
<uses-permission android:name="android.permission.internet" />
<uses-permission android:name="android.permission.write_external_storage" />
<uses-permission android:name="android.permission.access_network_state" />
<uses-permission android:name="android.permission.access_wifi_state" />
<uses-permission android:name="android.permission.read_phone_state" />
<uses-permission android:name="android.permission.access_coarse_location" />
<uses-permission android:name="android.permission.access_fine_location" />
<uses-permission android:name="android.permission.access_location_extra_commands" />
<uses-permission android:name="android.permission.access_mock_location" />
<uses-permission android:name="android.permission.change_wifi_state" />

<application
  android:icon="@mipmap/ic_launcher"
  android:label="@string/app_name"
  android:theme="@style/apptheme"

  >
  <!--设置key-->
  <meta-data
   android:name="com.amap.api.v2.apikey"
   android:value="这里填写第一步你申请的那个key" />
  <!--声明定位service-->
  <service android:name="com.amap.api.location.apsservice"></service>
</application>

<com.amap.api.maps2d.mapview
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:id="@+id/map"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent" />

//监听定位和定位变化
public class mainactivity extends appcompatactivity implements locationsource, amaplocationlistener {

 //显示地图需要的变量
 private mapview mapview;//地图控件
 private amap amap;//地图对象

 //定位需要的声明
 private amaplocationclient mlocationclient = null;//定位发起端
 private amaplocationclientoption mlocationoption = null;//定位参数
 private onlocationchangedlistener mlistener = null;//定位监听器

 //标识，用于判断是否只显示一次定位信息和用户重新定位
 private boolean isfirstloc = true;

 @override
 protected void oncreate(bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.activity_main);

  //显示地图
  mapview = (mapview) findviewbyid(r.id.map);
  //必须要写
  mapview.oncreate(savedinstancestate);
  //获取地图对象
  amap = mapview.getmap();

  //设置显示定位按钮 并且可以点击
  uisettings settings = amap.getuisettings();
  //设置定位监听
  amap.setlocationsource(this);
  // 是否显示定位按钮
  settings.setmylocationbuttonenabled(true);
  // 是否可触发定位并显示定位层
  amap.setmylocationenabled(true);

  //定位的小图标 默认是蓝点 这里自定义一团火，其实就是一张图片
  mylocationstyle mylocationstyle = new mylocationstyle();
  mylocationstyle.mylocationicon(bitmapdescriptorfactory.fromresource(r.mipmap.firetwo));
  mylocationstyle.radiusfillcolor(android.r.color.transparent);
  mylocationstyle.strokecolor(android.r.color.transparent);
  amap.setmylocationstyle(mylocationstyle);
  //开始定位
  initloc();
 }
 //定位
 private void initloc() {
  //初始化定位
  mlocationclient = new amaplocationclient(getapplicationcontext());
  //设置定位回调监听
  mlocationclient.setlocationlistener(this);
  //初始化定位参数
  mlocationoption = new amaplocationclientoption();
  //设置定位模式为高精度模式，battery_saving为低功耗模式，device_sensors是仅设备模式
  mlocationoption.setlocationmode(amaplocationclientoption.amaplocationmode.hight_accuracy);
  //设置是否返回地址信息（默认返回地址信息）
  mlocationoption.setneedaddress(true);
  //设置是否只定位一次,默认为false
  mlocationoption.setoncelocation(false);
  //设置是否强制刷新wifi，默认为强制刷新
  mlocationoption.setwifiactivescan(true);
  //设置是否允许模拟位置,默认为false，不允许模拟位置
  mlocationoption.setmockenable(false);
  //设置定位间隔,单位毫秒,默认为2000ms
  mlocationoption.setinterval(2000);
  //给定位客户端对象设置定位参数
  mlocationclient.setlocationoption(mlocationoption);
  //启动定位
  mlocationclient.startlocation();
 }

 //定位回调函数
 @override
 public void onlocationchanged(amaplocation amaplocation) {
  if (amaplocation != null) {
   if (amaplocation.geterrorcode() == 0) {
    //定位成功回调信息，设置相关消息
    amaplocation.getlocationtype();//获取当前定位结果来源，如网络定位结果，详见官方定位类型表
    amaplocation.getlatitude();//获取纬度
    amaplocation.getlongitude();//获取经度
    amaplocation.getaccuracy();//获取精度信息
    simpledateformat df = new simpledateformat("yyyy-mm-dd hh:mm:ss");
    date date = new date(amaplocation.gettime());
    df.format(date);//定位时间
    amaplocation.getaddress();//地址，如果option中设置isneedaddress为false，则没有此结果，网络定位结果中会有地址信息，gps定位不返回地址信息。
    amaplocation.getcountry();//国家信息
    amaplocation.getprovince();//省信息
    amaplocation.getcity();//城市信息
    amaplocation.getdistrict();//城区信息
    amaplocation.getstreet();//街道信息
    amaplocation.getstreetnum();//街道门牌号信息
    amaplocation.getcitycode();//城市编码
    amaplocation.getadcode();//地区编码

    // 如果不设置标志位，此时再拖动地图时，它会不断将地图移动到当前的位置
    if (isfirstloc) {
     //设置缩放级别
     amap.movecamera(cameraupdatefactory.zoomto(17));
     //将地图移动到定位点
     amap.movecamera(cameraupdatefactory.changelatlng(new latlng(amaplocation.getlatitude(), amaplocation.getlongitude())));
     //点击定位按钮 能够将地图的中心移动到定位点
     mlistener.onlocationchanged(amaplocation);
     //添加图钉
     amap.addmarker(getmarkeroptions(amaplocation));
     //获取定位信息
     stringbuffer buffer = new stringbuffer();
     buffer.append(amaplocation.getcountry() + "" + amaplocation.getprovince() + "" + amaplocation.getcity() + "" + amaplocation.getprovince() + "" + amaplocation.getdistrict() + "" + amaplocation.getstreet() + "" + amaplocation.getstreetnum());
     toast.maketext(getapplicationcontext(), buffer.tostring(), toast.length_long).show();
     isfirstloc = false;
    }

   } else {
    //显示错误信息errcode是错误码，errinfo是错误信息，详见错误码表。
    log.e("amaperror", "location error, errcode:"
      + amaplocation.geterrorcode() + ", errinfo:"
      + amaplocation.geterrorinfo());

    toast.maketext(getapplicationcontext(), "定位失败", toast.length_long).show();
   }
  }
 }

 //自定义一个图钉，并且设置图标，当我们点击图钉时，显示设置的信息
 private markeroptions getmarkeroptions(amaplocation amaplocation) {
   //设置图钉选项
  markeroptions options = new markeroptions();
  //图标
  options.icon(bitmapdescriptorfactory.fromresource(r.mipmap.fire));
  //位置
  options.position(new latlng(amaplocation.getlatitude(), amaplocation.getlongitude()));
  stringbuffer buffer = new stringbuffer();
  buffer.append(amaplocation.getcountry() + "" + amaplocation.getprovince() + "" + amaplocation.getcity() + "" + amaplocation.getdistrict() + "" + amaplocation.getstreet() + "" + amaplocation.getstreetnum());
  //标题
  options.title(buffer.tostring());
  //子标题
  options.snippet("这里好火");
  //设置多少帧刷新一次图片资源
  options.period(60);
  return options;

 }
 //激活定位
 @override
 public void activate(onlocationchangedlistener listener) {
  mlistener = listener;
 }

 //停止定位
 @override
 public void deactivate() {
  mlistener = null;
 }

 /**
  * 方法必须重写
  */
 @override
 protected void onresume() {
  super.onresume();
  mapview.onresume();
 }

 /**
  * 方法必须重写
  */
 @override
 protected void onpause() {
  super.onpause();
  mapview.onpause();
 }

 /**
  * 方法必须重写
  */
 @override
 protected void onsaveinstancestate(bundle outstate) {
  super.onsaveinstancestate(outstate);
  mapview.onsaveinstancestate(outstate);
 }

 /**
  * 方法必须重写
  */
 @override
 protected void ondestroy() {
  super.ondestroy();
  mapview.ondestroy();
 }
}

public class mainactivity extends appcompatactivity implements amap.onmaplongclicklistener, amap.onmapscreenshotlistener, locationsource, amaplocationlistener

 /**
  * 长按地图进行截屏
  *
  * @param latlng
  */
 @override
 public void onmaplongclick(latlng latlng) {

  // 设置截屏监听接口，截取地图可视区域
  // 需要传入一个 amap.onmaplongclicklistener 接口的实现者
  amap.getmapscreenshot(this);
 }
 /**
  * 截屏回调方法 保存截图
  */

 @override
 public void onmapscreenshot(bitmap bitmap) {
  simpledateformat sdf = new simpledateformat("yyyymmddhhmmss");
  try {
   // 保存在sd卡根目录下，图片为png格式。
   fileoutputstream fos = new fileoutputstream(
     environment.getexternalstoragedirectory() + "/test_"
       + sdf.format(new date()) + ".png");
   boolean b = bitmap.compress(bitmap.compressformat.png, 100, fos);
   try {
    fos.flush();
   } catch (ioexception e) {
    e.printstacktrace();
   }
   try {
    fos.close();
   } catch (ioexception e) {
    e.printstacktrace();
   }
   if (b)

    toast.maketext(mainactivity.this, "截屏成功", toast.length_long).show();
   else {
    toast.maketext(mainactivity.this, "截屏失败", toast.length_long).show();
   }
  } catch (filenotfoundexception e) {
   e.printstacktrace();
  }
 }