动态申请权限的坑

1、 permission_group

 　　　　直接取申请  group  不会弹出 申请权限的框

2、

  onClieck():

   public void onClick(View view) {
        if (ContextCompat.checkSelfPermission(this, Manifest.permission_group.STORAGE)!=PackageManager.PERMISSION_GRANTED
//        ||ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE)!=PackageManager.PERMISSION_GRANTED
                ){
            Log.d(TAG, "没有权限: ");
            ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.READ_EXTERNAL_STORAGE,Manifest.permission.WRITE_EXTERNAL_STORAGE},REQUEST_STORAGE_GROUP_CODE);
            return;
        }

onRequestPermissionsResult():

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        switch (requestCode){
            case REQUEST_STORAGE_GROUP_CODE :
                if (grantResults.length>0&&grantResults[0]==PackageManager.PERMISSION_GRANTED){
                    Log.d(TAG, "获取到权限: ");
                }
        }

    }

运行日志：

05-23 15:04:38.080 11151-11151/com.example.videodownload D/MainActivity: 没有权限: 
05-23 15:04:38.120 11151-11151/com.example.videodownload D/MainActivity: 获取到权限: 
05-23 15:04:44.651 11151-11151/com.example.videodownload D/MainActivity: 没有权限: 
05-23 15:04:44.684 11151-11151/com.example.videodownload D/MainActivity: 获取到权限: 
05-23 15:04:45.020 11151-11151/com.example.videodownload D/MainActivity: 没有权限: 
05-23 15:04:45.050 11151-11151/com.example.videodownload D/MainActivity: 获取到权限: 
05-23 15:04:45.310 11151-11151/com.example.videodownload D/MainActivity: 没有权限: 
05-23 15:04:45.337 11151-11151/com.example.videodownload D/MainActivity: 获取到权限: