关于使用LocationManager时遇到的问题

在使用下面这行代码的时候，android studio提示Call requires permission which may be rejected by user 

Location location = locationManager.getLastKnownLocation(locationProvider);
我在网上了解了一下，这个问题是因为在api23以后，需要一个提示。

我的解决方案
Compile Sdk Version：6.0

Build Tools Version：23.0.1

build.gradle:

apply plugin: 'com.android.application'

android {
compileSdkVersion 23
buildToolsVersion '23.0.1'
defaultConfig {
applicationId "com.example.baidumaptest"
minSdkVersion 21
targetSdkVersion 21
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
useLibrary 'org.apache.http.legacy'
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}

dependencies {
compile files('libs/baidumapapi_base_v4_1_1.jar')
compile files('libs/baidumapapi_cloud_v4_1_1.jar')
compile files('libs/baidumapapi_map_v4_1_1.jar')
compile files('libs/baidumapapi_radar_v4_1_1.jar')
compile files('libs/baidumapapi_search_v4_1_1.jar')
compile files('libs/baidumapapi_util_v4_1_1.jar')
compile fileTree(include: ['*.jar'], dir: 'libs')
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:+'
testCompile 'junit:junit:4.12'
}
红色部分即是需要修改的部分。
最后重启as问题就解决了。