Android権限の問題

「アクセス権の問題」--次のように記録します.

private void getPermission(){
        //     
        List permissionList = new ArrayList<>();
        if(ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.INTERNET)
                !=  PackageManager.PERMISSION_GRANTED){
            permissionList.add(Manifest.permission.INTERNET);
        }
        if(ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_EXTERNAL_STORAGE)
                !=  PackageManager.PERMISSION_GRANTED){
            permissionList.add(Manifest.permission.READ_EXTERNAL_STORAGE);
        }
        if(ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
                !=  PackageManager.PERMISSION_GRANTED){
            permissionList.add(Manifest.permission.WRITE_EXTERNAL_STORAGE);
        }
        //        ----      ---     
        if(!permissionList.isEmpty()){
            String[] permissions = permissionList.toArray(new String[permissionList.size()]);
            ActivityCompat.requestPermissions(MainActivity.this, permissions, 1);
        }
        else{
            //    --         --         ，       
            startMethods();
        }
    }
    //    --  
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        //      
        switch (requestCode){
            case 1:
                //              
                if(grantResults.length>0){
                    for(int result:grantResults){
                        if(result!=PackageManager.PERMISSION_GRANTED){
                            Toast.makeText(this, "            ", Toast.LENGTH_SHORT).show();
                            finish();
                            return;
                        }
                    }
                    startMethods();
                }else{
                    Toast.makeText(this, "    ", Toast.LENGTH_SHORT).show();
                    finish();
                }
                break;
            default:
                break;
        }
    }