安卓百度地图开发（二）6.0以上无法定位的问题
遇到的问题：利用百度地图sdk实现定位时，用官方demo的代码只能显示在北京（即定位失败）的问题。
解决方法：这是因为安卓6.0以上需要动态获取权限（弹出框询问用户是否通过权限）的操作，所以即使在manifest里面申请了权限也无法正确运行
首先，请看官方 文档
其实我觉得文档写的不太详细啦，不过既然提到了6.0以上需要动态获取权限，就自力更生啦。
先上完整代码：
①manifest中的权限设置：
并且在 application 标签里面加入
② xml
③ Activity
import android.Manifest;
import android.app.Activity;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CompoundButton;
import android.widget.RadioGroup.OnCheckedChangeListener;
import android.widget.Toast;
import android.widget.ToggleButton;
import com.baidu.location.BDLocation;
import com.baidu.location.BDLocationListener;
import com.baidu.location.LocationClient;
import com.baidu.location.LocationClientOption;
import com.baidu.mapapi.SDKInitializer;
import com.baidu.mapapi.map.BaiduMap;
import com.baidu.mapapi.map.BitmapDescriptor;
import com.baidu.mapapi.map.MapStatusUpdate;
import com.baidu.mapapi.map.MapStatusUpdateFactory;
import com.baidu.mapapi.map.MapView;
import com.baidu.mapapi.map.MyLocationConfiguration;
import com.baidu.mapapi.map.MyLocationConfiguration.LocationMode;
import com.baidu.mapapi.map.MyLocationData;
import com.baidu.mapapi.model.LatLng;
/**
* 此demo用来展示如何结合定位SDK实现定位，并使用MyLocationOverlay绘制定位位置 同时展示如何使用自定义图标绘制并点击时弹出泡泡
*
*/
public class LocationDemo extends Activity {
// 定位相关
LocationClient mLocClient;
public MyLocationListenner myListener = new MyLocationListenner();
private LocationMode mCurrentMode;
BitmapDescriptor mCurrentMarker;
MapView mMapView;
BaiduMap mBaiduMap;
// UI相关
OnCheckedChangeListener radioButtonListener;
Button requestLocButton;
ToggleButton togglebtn = null;
boolean isFirstLoc = true;// 是否首次定位
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
SDKInitializer.initialize(getApplicationContext());
setContentView(R.layout.activity_location);
judgePermission();
requestLocButton = (Button) findViewById(R.id.button1);
mCurrentMode = LocationMode.NORMAL;
requestLocButton.setText("普通");
OnClickListener btnClickListener = new OnClickListener() {
public void onClick(View v) {
switch (mCurrentMode) {
case NORMAL:
requestLocButton.setText("跟随");
mCurrentMode = LocationMode.FOLLOWING;
mBaiduMap
.setMyLocationConfigeration(new MyLocationConfiguration(
mCurrentMode, true, mCurrentMarker));
break;
case COMPASS:
requestLocButton.setText("普通");
mCurrentMode = LocationMode.NORMAL;
mBaiduMap
.setMyLocationConfigeration(new MyLocationConfiguration(
mCurrentMode, true, mCurrentMarker));
break;
case FOLLOWING:
requestLocButton.setText("罗盘");
mCurrentMode = LocationMode.COMPASS;
mBaiduMap
.setMyLocationConfigeration(new MyLocationConfiguration(
mCurrentMode, true, mCurrentMarker));
break;
}
}
};
requestLocButton.setOnClickListener(btnClickListener);
togglebtn = (ToggleButton) findViewById(R.id.togglebutton);
togglebtn
.setOnCheckedChangeListener(new android.widget.CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
if (isChecked) {
// 普通地图
mBaiduMap.setMapType(BaiduMap.MAP_TYPE_SATELLITE);
} else {
// 卫星地图
mBaiduMap.setMapType(BaiduMap.MAP_TYPE_NORMAL);
}
}
});
// 地图初始化
mMapView = (MapView) findViewById(R.id.bmapView);
mBaiduMap = mMapView.getMap();
// 开启定位图层
mBaiduMap.setMyLocationEnabled(true);
// 定位初始化
mLocClient = new LocationClient(this);
mLocClient.registerLocationListener(myListener);
LocationClientOption option = new LocationClientOption();
option.setOpenGps(true);// 打开gps
option.setCoorType("bd09ll"); // 设置坐标类型
option.setScanSpan(1000);// 设置发起定位请求的间隔时间为1000ms
option.setIsNeedAddress(true);
mLocClient.setLocOption(option);
mLocClient.start();
}
/**
* 定位SDK监听函数
*/
public class MyLocationListenner implements BDLocationListener {
@Override
public void onReceiveLocation(BDLocation location) {
// map view 销毁后不在处理新接收的位置
if (location == null || mMapView == null)
return;
MyLocationData locData = new MyLocationData.Builder()
.accuracy(location.getRadius())
// 此处设置开发者获取到的方向信息，顺时针0-360
.direction(100).latitude(location.getLatitude())
.longitude(location.getLongitude()).build();
mBaiduMap.setMyLocationData(locData);
if (isFirstLoc) {
isFirstLoc = false;
LatLng ll = new LatLng(location.getLatitude(),
location.getLongitude());
// MapStatusUpdate u = MapStatusUpdateFactory.newLatLng(ll);
// 设置缩放比例,更新地图状态
float f = mBaiduMap.getMaxZoomLevel();// 19.0
MapStatusUpdate u = MapStatusUpdateFactory.newLatLngZoom(ll,
f - 2);
mBaiduMap.animateMapStatus(u);
//地图位置显示
Toast.makeText(LocationDemo.this, location.getAddrStr(),
Toast.LENGTH_SHORT).show();
}
}
public void onReceivePoi(BDLocation poiLocation) {
}
}
@Override
protected void onPause() {
mMapView.onPause();
super.onPause();
}
@Override
protected void onResume() {
mMapView.onResume();
super.onResume();
}
@Override
protected void onDestroy() {
// 退出时销毁定位
mLocClient.stop();
// 关闭定位图层
mBaiduMap.setMyLocationEnabled(false);
mMapView.onDestroy();
mMapView = null;
super.onDestroy();
}
//6.0之后要动态获取权限，重要！！！
protected void judgePermission() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
// 检查该权限是否已经获取
// 权限是否已经 授权 GRANTED---授权 DINIED---拒绝
// sd卡权限
String[] SdCardPermission = {Manifest.permission.WRITE_EXTERNAL_STORAGE};
if (ContextCompat.checkSelfPermission(this, SdCardPermission[0]) != PackageManager.PERMISSION_GRANTED) {
// 如果没有授予该权限，就去提示用户请求
ActivityCompat.requestPermissions(this, SdCardPermission, 100);
}
//手机状态权限
String[] readPhoneStatePermission = {Manifest.permission.READ_PHONE_STATE};
if (ContextCompat.checkSelfPermission(this, readPhoneStatePermission[0]) != PackageManager.PERMISSION_GRANTED) {
// 如果没有授予该权限，就去提示用户请求
ActivityCompat.requestPermissions(this, readPhoneStatePermission, 200);
}
//定位权限
String[] locationPermission = {Manifest.permission.ACCESS_FINE_LOCATION};
if (ContextCompat.checkSelfPermission(this, locationPermission[0]) != PackageManager.PERMISSION_GRANTED) {
// 如果没有授予该权限，就去提示用户请求
ActivityCompat.requestPermissions(this, locationPermission, 300);
}
String[] ACCESS_COARSE_LOCATION = {Manifest.permission.ACCESS_COARSE_LOCATION};
if (ContextCompat.checkSelfPermission(this, ACCESS_COARSE_LOCATION[0]) != PackageManager.PERMISSION_GRANTED) {
// 如果没有授予该权限，就去提示用户请求
ActivityCompat.requestPermissions(this, ACCESS_COARSE_LOCATION, 400);
}
String[] READ_EXTERNAL_STORAGE = {Manifest.permission.READ_EXTERNAL_STORAGE};
if (ContextCompat.checkSelfPermission(this, READ_EXTERNAL_STORAGE[0]) != PackageManager.PERMISSION_GRANTED) {
// 如果没有授予该权限，就去提示用户请求
ActivityCompat.requestPermissions(this, READ_EXTERNAL_STORAGE, 500);
}
String[] WRITE_EXTERNAL_STORAGE = {Manifest.permission.WRITE_EXTERNAL_STORAGE};
if (ContextCompat.checkSelfPermission(this, WRITE_EXTERNAL_STORAGE[0]) != PackageManager.PERMISSION_GRANTED) {
// 如果没有授予该权限，就去提示用户请求
ActivityCompat.requestPermissions(this, WRITE_EXTERNAL_STORAGE, 600);
}
}else{
//doSdCardResult();
}
//LocationClient.reStart();
}
} 其中的重点代码是动态申请权限部分：
//6.0之后要动态获取权限，重要！！！
protected void judgePermission() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
// 检查该权限是否已经获取
// 权限是否已经 授权 GRANTED---授权 DINIED---拒绝
// sd卡权限
String[] SdCardPermission = {Manifest.permission.WRITE_EXTERNAL_STORAGE};
if (ContextCompat.checkSelfPermission(this, SdCardPermission[0]) != PackageManager.PERMISSION_GRANTED) {
// 如果没有授予该权限，就去提示用户请求
ActivityCompat.requestPermissions(this, SdCardPermission, 100);
}
//手机状态权限
String[] readPhoneStatePermission = {Manifest.permission.READ_PHONE_STATE};
if (ContextCompat.checkSelfPermission(this, readPhoneStatePermission[0]) != PackageManager.PERMISSION_GRANTED) {
// 如果没有授予该权限，就去提示用户请求
ActivityCompat.requestPermissions(this, readPhoneStatePermission, 200);
}
//定位权限
String[] locationPermission = {Manifest.permission.ACCESS_FINE_LOCATION};
if (ContextCompat.checkSelfPermission(this, locationPermission[0]) != PackageManager.PERMISSION_GRANTED) {
// 如果没有授予该权限，就去提示用户请求
ActivityCompat.requestPermissions(this, locationPermission, 300);
}
String[] ACCESS_COARSE_LOCATION = {Manifest.permission.ACCESS_COARSE_LOCATION};
if (ContextCompat.checkSelfPermission(this, ACCESS_COARSE_LOCATION[0]) != PackageManager.PERMISSION_GRANTED) {
// 如果没有授予该权限，就去提示用户请求
ActivityCompat.requestPermissions(this, ACCESS_COARSE_LOCATION, 400);
}
String[] READ_EXTERNAL_STORAGE = {Manifest.permission.READ_EXTERNAL_STORAGE};
if (ContextCompat.checkSelfPermission(this, READ_EXTERNAL_STORAGE[0]) != PackageManager.PERMISSION_GRANTED) {
// 如果没有授予该权限，就去提示用户请求
ActivityCompat.requestPermissions(this, READ_EXTERNAL_STORAGE, 500);
}
String[] WRITE_EXTERNAL_STORAGE = {Manifest.permission.WRITE_EXTERNAL_STORAGE};
if (ContextCompat.checkSelfPermission(this, WRITE_EXTERNAL_STORAGE[0]) != PackageManager.PERMISSION_GRANTED) {
// 如果没有授予该权限，就去提示用户请求
ActivityCompat.requestPermissions(this, WRITE_EXTERNAL_STORAGE, 600);
}
}else{
//doSdCardResult();
}
//LocationClient.reStart();
}
} 这里申请的权限来自于 官方文档 中写的：
这样就能正常显示定位了，效果图如下
