android系统6.0以及以上是动态权限

package com.example.admin.rxjava.ui.activity;

import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.os.Build;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;


import com.blankj.utilcode.util.PermissionUtils;
import com.example.admin.rxjava.R;
import com.example.admin.rxjava.ui.net.ApiService;
import com.example.admin.rxjava.ui.net.HttpRetrofitClient;

import java.io.InputStream;
import java.io.RandomAccessFile;
import java.util.ArrayList;
import java.util.List;

import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.functions.Consumer;
import io.reactivex.schedulers.Schedulers;
import okhttp3.OkHttpClient;
import okhttp3.ResponseBody;
import retrofit2.Retrofit;
import retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory;
import retrofit2.converter.gson.GsonConverterFactory;

public class PublishMainActivity extends AppCompatActivity implements View.OnClickListener {

    private TextView tvDownload;
    private TextView tvSinglePermission = null;
    private TextView tvMuticePermission = null;

    private static final int MY_PERMISSIONS_REQUEST_CALL_PHONE = 1;
    private static final int MY_PERMISSIONS_REQUEST_CALL_CAMERA = 2;


    //运行时候需要的所有权限
    String[] permissions = new String[]{
            Manifest.permission.CAMERA,
            Manifest.permission.WRITE_EXTERNAL_STORAGE,
            Manifest.permission.CALL_PHONE
    };
    //声明一个集合 装用户手动拒绝的权限
    List<String> permissionList = new ArrayList<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_publish_main);
        tvDownload = findViewById(R.id.tv_download_file);
        tvSinglePermission = this.findViewById(R.id.tv_single_permission);
        tvMuticePermission = this.findViewById(R.id.tv_multice_permission);

        tvSinglePermission.setOnClickListener(this);
        tvMuticePermission.setOnClickListener(this);
        tvDownload.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.tv_single_permission: //单个授权
                int sdk_int = Build.VERSION.SDK_INT;
                int android_m = Build.VERSION_CODES.M;
                Toast.makeText(PublishMainActivity.this, "sdk_int" + sdk_int + "," + android_m, Toast.LENGTH_LONG).show();
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                    //如果当前系统是大于23的话

                    if (PermissionUtils.isGranted(Manifest.permission.CALL_PHONE)) {
                        //检查用户是否授权
                        Toast.makeText(PublishMainActivity.this, "用户已经授权", Toast.LENGTH_LONG).show();
                    } else {
                        //请求授权 系统会打开弹窗
                        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CALL_PHONE}, MY_PERMISSIONS_REQUEST_CALL_PHONE);

                    }
                }
                break;
            case R.id.tv_multice_permission:

                break;
            case R.id.tv_download_file:
                ApiService apiService = HttpRetrofitClient.getInstance().create(ApiService.class);
                Observable<ResponseBody> observable = apiService.downLoadFile("");
                observable.subscribeOn(Schedulers.io())
                        .observeOn(AndroidSchedulers.mainThread())
                        .subscribe(new Consumer<ResponseBody>() {
                            @Override
                            public void accept(ResponseBody responseBody) throws Exception {
                                InputStream inputStream = responseBody.byteStream();
                                //new RandomAccessFile()
                            }
                        });
                break;
        }
    }


    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        if (requestCode == MY_PERMISSIONS_REQUEST_CALL_PHONE) {
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                //打电话权限已经申请
                Log.i("gdchent", "result");
            } else {
                Log.i("gdchent", "用户没有授权");
            }

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