百度地图API解决 android 6.0定位不了的问题

首先是搭建环境，这就不多说了，官方传送门 http://lbsyun.baidu.com/index.php?title=android-locsdk/guide/v5-0

接着 初始化地图

private  void init(){
// 地图初始化
mMapView.setVisibility(View.VISIBLE);
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.setLocationMode(LocationClientOption.LocationMode.Hight_Accuracy);
option.setOpenGps(true); // 打开gps
option.setCoorType("bd09ll"); // 设置坐标类型
option.setScanSpan(1000);
mLocClient.setLocOption(option)
mLocClient.start();
mCurrentMode = LocationMode.COMPASS;
mBaiduMap
.setMyLocationConfigeration(new MyLocationConfiguration(
mCurrentMode, true, null));
}

3定位SDK的监听函数：

/**
* 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());
MapStatus.Builder builder = new MapStatus.Builder();
builder.target(ll).zoom(18.0f);
mBaiduMap.animateMapStatus(MapStatusUpdateFactory.newMapStatus(builder.build()));

}
}

public void onReceivePoi(BDLocation poiLocation) {
}
}

到这里，如果我们直接运行的话，在android 6以下是运行成功的，在android 6以上会出现运行失败的情况,运行失败的原因在于android 6.0采用了运行时权限（android-RuntimePermissions），6.0的权限一般分为两种，一种时普通权限，如下图：其他的为运行时权限



在百度地图API中，用到的权限主要有以下几个

<uses-permission android:name="com.android.launcher.permission.READ_SETTINGS" />
<!-- 这个权限用于进行网络定位 -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<!-- 这个权限用于访问GPS定位 -->
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<!-- 用于访问wifi网络信息，wifi信息会用于进行网络定位 -->
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<!-- 获取运营商信息，用于支持提供运营商信息相关的接口 -->
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_SETTINGS" />
<!-- 用于读取手机当前的状态 -->
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<!-- 写入扩展存储，向扩展卡写入数据，用于写入离线定位数据 -->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
<!-- 访问网络，网络定位需要上网 -->
<uses-permission android:name="android.permission.INTERNET" />

其中：

Manifest.permission.ACCESS_COARSE_LOCATION,
Manifest.permission.ACCESS_FINE_LOCATION,Manifest.permission.WRITE_EXTERNAL_STORAGE,Manifest.permission.READ_PHONE_STATE

这几个为运行时权限，需要在运行时得到用户的授权。

在Activity中进行授权如下：判断用户的Android版本，如果为23（6.0），执行showcontacts,提醒用户授权

if (Build.VERSION.SDK_INT>=23){
showContacts(mMapView);
}else{
init();
}

判断用户是否已经授权，如果已经授权，直接开始定位，如果没有授权，

requestContactsPermissions(v);

提示用户进行授权

public void showContacts(View v) {
Log.i(TAG, "Show contacts button pressed. Checking permissions.");

// Verify that all required contact permissions have been granted.
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION)
!= PackageManager.PERMISSION_GRANTED
|| ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED
|| ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED
|| ActivityCompat.checkSelfPermission(this, Manifest.permission.READ_PHONE_STATE)
!= PackageManager.PERMISSION_GRANTED) {
// Contacts permissions have not been granted.
Log.i(TAG, "Contact permissions has NOT been granted. Requesting permissions.");
requestContactsPermissions(v);

} else {

// Contact permissions have been granted. Show the contacts fragment.
Log.i(TAG,
"Contact permissions have already been granted. Displaying contact details.");
init();
}
}

private void requestContactsPermissions(View v) {
// BEGIN_INCLUDE(contacts_permission_request)
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.ACCESS_COARSE_LOCATION)
|| ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.ACCESS_FINE_LOCATION)
|| ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.WRITE_EXTERNAL_STORAGE)
|| ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.READ_PHONE_STATE)
) {

// Provide an additional rationale to the user if the permission was not granted
// and the user would benefit from additional context for the use of the permission.
// For example, if the request has been denied previously.
Log.i(TAG,
"Displaying contacts permission rationale to provide additional context.");

// Display a SnackBar with an explanation and a button to trigger the request.
Snackbar.make(v, "permission_contacts_rationale",
Snackbar.LENGTH_INDEFINITE)
.setAction("ok", new View.OnClickListener() {
@Override
public void onClick(View view) {
ActivityCompat
.requestPermissions(MainActivity.this, PERMISSIONS_CONTACT,
REQUEST_CONTACTS);
}
})
.show();
} else {
// Contact permissions have not been granted yet. Request them directly.
ActivityCompat.requestPermissions(this, PERMISSIONS_CONTACT, REQUEST_CONTACTS);
}
// END_INCLUDE(contacts_permission_request)
}

最后，对授权的结果进行判定：

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {

if (requestCode==REQUEST_CONTACTS){
if (PermissionUtil.verifyPermissions(grantResults)) {

init();

} else {

}

}else{
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}

其中 permissonutil代码如下

/**
* Utility class that wraps access to the runtime permissions API in M and provides basic helper
* methods.
*/
public abstract class PermissionUtil {

/**
* Check that all given permissions have been granted by verifying that each entry in the
* given array is of the value {@link PackageManager#PERMISSION_GRANTED}.
*
* @see Activity#onRequestPermissionsResult(int, String[], int[])
*/
public static boolean verifyPermissions(int[] grantResults) {
// At least one result must be checked.
if(grantResults.length < 1){
return false;
}

// Verify that each required permission has been granted, otherwise return false.
for (int result : grantResults) {
if (result != PackageManager.PERMISSION_GRANTED) {
return false;
}
}
return true;
}

}

最后，运行结果