android-m ie，api 23引入了运行时权限，以减少android设备的安全缺陷，用户现在可以在运行时直接管理应用程序权限。因此，如果用户拒绝您的应用程序的特定权限，您必须通过询问您在查询中提到的权限对话框来获取该权限。
因此，在操作之前检查，即检查您是否有访问资源链接的权限，如果您的应用程序没有该特定权限，您可以请求权限链接并处理权限请求响应，如下所示。

@Override
public void onRequestPermissionsResult(int requestCode,
        String permissions[], int[] grantResults) {
    switch (requestCode) {
        case MY_PERMISSIONS_REQUEST_READ_CONTACTS: {
            // If request is cancelled, the result arrays are empty.
            if (grantResults.length > 0
                && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                // permission was granted, yay! Do the
                // contacts-related task you need to do.

               } else {

                // permission denied, boo! Disable the
                // functionality that depends on this permission.
            }
            return;
        }

        // other 'case' lines to check for other
        // permissions this app might request
    }
}

最后，如果您计划使用新版本以避免强制关闭，那么进行行为更改是一个很好的做法：）
权限最佳实践。
你可以在这里浏览官方的示例应用程序。

这可能是一种更干净的方式。在数组中添加所有权限，如

private static final String[] INITIAL_PERMS={
            android.Manifest.permission.ACCESS_FINE_LOCATION,
            android.Manifest.permission.ACCESS_COARSE_LOCATION
    };
    private static final int INITIAL_REQUEST=1337;

不管你的权限是什么，为每个权限创建一个方法

@RequiresApi(api = Build.VERSION_CODES.M)
private boolean canAccessFineLocation() {
    return(hasPermission(Manifest.permission.ACCESS_FINE_LOCATION));
}

@RequiresApi(api = Build.VERSION_CODES.M)
private boolean canAccessCoarseLocation() {
    return(hasPermission(Manifest.permission.ACCESS_COARSE_LOCATION));
}

@RequiresApi(api = Build.VERSION_CODES.M)
private boolean hasPermission(String perm) {
    return(PackageManager.PERMISSION_GRANTED == checkSelfPermission(perm));
}

在oncreate中调用此方法

if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){
      if(!canAccessCoarseLocation() || !canAccessFineLocation()){
            requestPermissions(INITIAL_PERMS, INITIAL_REQUEST);
        }
 }

现在重写onrequestpermissionsresult

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

    if(requestCode == INITIAL_REQUEST){
        if (canAccessFineLocation() && canAccessCoarseLocation())  {
            //call your method
        }
        else {
            //show Toast or alert that this permissions is neccessary
        }
    }
}

当后台服务需要权限时，如果需要请求权限，可以使用一个好的库。尽管library的一个局限性是它不能仅用于确定当前是否授予应用程序权限。它总是询问用户应用程序是否还没有它们。
一定要尝试一下，因为它让生活更简单：android权限

从android棉花糖（api 23）和以上的默认所有危险权限（根据官方文件）禁用。安装后，当应用程序首次打开时，您必须在运行时授予权限。
我是通过以下方式实现的：

public class MarshMallowPermission {

    public static final int EXTERNAL_STORAGE_PERMISSION_REQUEST_CODE_BY_GALLERY = 0;
    public static final int EXTERNAL_STORAGE_PERMISSION_REQUEST_CODE_BY_CAMERA = 1;
    public static final int EXTERNAL_STORAGE_PERMISSION_REQUEST_CODE_BY_LOAD_PROFILE = 2;
    public static final int CAMERA_PERMISSION_REQUEST_CODE = 3;
    public static final int LOCATION_PERMISSION_REQUEST_CODE = 4;
    Activity activity;
    Context mContext;

    public MarshMallowPermission(Activity activity) {
        this.activity = activity;
        this.mContext = activity;
    }

    public boolean checkPermissionForExternalStorage(){
        int result = ContextCompat.checkSelfPermission(activity, Manifest.permission.WRITE_EXTERNAL_STORAGE);
        if (result == PackageManager.PERMISSION_GRANTED){
            return true;
        } else {
            return false;
        }
    }

    public boolean checkPermissionForCamera(){
        int result = ContextCompat.checkSelfPermission(activity, Manifest.permission.CAMERA);
        if (result == PackageManager.PERMISSION_GRANTED){
            return true;
        } else {
            return false;
        }
    }

    public boolean checkLocationPermission(){

        int result = ActivityCompat.checkSelfPermission(activity, Manifest.permission.ACCESS_FINE_LOCATION);
        if (result == PackageManager.PERMISSION_GRANTED){
            return true;
        } else {
            return false;
        }
    }

    public void requestPermissionForExternalStorage(int requestCode){
        if (ActivityCompat.shouldShowRequestPermissionRationale(activity, Manifest.permission.WRITE_EXTERNAL_STORAGE)){
            Toast.makeText(mContext.getApplicationContext(), "External Storage permission needed. Please allow in App Settings for additional functionality.", Toast.LENGTH_LONG).show();
        } else {
            ActivityCompat.requestPermissions(activity,new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},requestCode);
        }
    }

    public void requestPermissionForCamera(){
        if (ActivityCompat.shouldShowRequestPermissionRationale(activity, Manifest.permission.CAMERA)){
            Toast.makeText(mContext.getApplicationContext(), "Camera permission needed. Please allow in App Settings for additional functionality.", Toast.LENGTH_LONG).show();
        } else {
            ActivityCompat.requestPermissions(activity,new String[]{Manifest.permission.CAMERA},CAMERA_PERMISSION_REQUEST_CODE);
        }
    }
    public void requestPermissionForLocation(){
        if (ActivityCompat.shouldShowRequestPermissionRationale(activity, Manifest.permission.ACCESS_FINE_LOCATION) && ActivityCompat.shouldShowRequestPermissionRationale(activity, Manifest.permission.ACCESS_COARSE_LOCATION)){
            Toast.makeText(mContext.getApplicationContext(), "Location permission needed. Please allow in App Settings for additional functionality.", Toast.LENGTH_LONG).show();
        } else {
            ActivityCompat.requestPermissions(activity, new String[]{Manifest.permission.ACCESS_FINE_LOCATION,Manifest.permission.ACCESS_COARSE_LOCATION}, LOCATION_PERMISSION_REQUEST_CODE);
        }
    }
}

在活动课上：

public class MainActivity extends AppCompatActivity{

   private MarshMallowPermission marshMallowPermission;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        Log.d("NavHome", "Oncreate_nav");
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        marshMallowPermission = new MarshMallowPermission(MainActivity.this);

        if (!marshMallowPermission.checkPermissionForExternalStorage()) {
            marshMallowPermission.requestPermissionForExternalStorage(MarshMallowPermission.EXTERNAL_STORAGE_PERMISSION_REQUEST_CODE_BY_LOAD_PROFILE);
        }
    }

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

        switch (requestCode) {
            case MarshMallowPermission.EXTERNAL_STORAGE_PERMISSION_REQUEST_CODE_BY_LOAD_PROFILE:
                if (grantResults.length > 0
                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                    //permission granted successfully

                } else {

                 //permission denied

                }
                break;
    }
    }

}