android 拍照resultCode 返回0，不等于RESULT_OK -1详解手机开发

问题：无论点击拍照后的对勾还是取消，resultCode 都为0；

    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    
        super.onActivityResult(requestCode, resultCode, data); 
        if (resultCode == RESULT_OK && requestCode == REQUEST_CODE_TAKE_PHOTO) {
    
            mIvPhoto.setImageBitmap(BitmapFactory.decodeFile(mCurrentPhotoPath)); 
        } 
    } 

原因：无sd卡读写权限，导致无法访问就默认为取消
解决办法：
打开相机前动态申请权限，这里使用了PermissionsDispatcher权限适配和FitAndroid7 android 7.0适配

    @NeedsPermission({
   Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE}) 
    protected void takePhoto() {
    
        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
        if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
    
            String filename = new SimpleDateFormat("yyyyMMdd-HHmmss", Locale.CHINA).format(new Date()) + ".png"; 
            File file = new File(Environment.getExternalStorageDirectory(), filename); 
            mCurrentPhotoPath = file.getAbsolutePath(); 
            // 仅需改变这一行 
            Uri fileUri = FileProvider7.getUriForFile(this, file); 
            takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); 
            startActivityForResult(takePictureIntent, REQUEST_CODE_TAKE_PHOTO); 
        } 
    } 

仅此记录