百度地图API解决 android 6.0定位不了的问题
原文得治：http://blog.csdn.net/qq_25817651/article/details/50913055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;
}
}
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