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解決android6.0開啟攝像頭許可權"Failed to connect to camera service"的問題 ,動態獲取許可權

android6.0使用camera.open()時需要在onCreate()裡面新增如下程式碼,否則會報錯"Failed to connect to camera service":

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            if (checkSelfPermission(Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
                requestPermissions(new String[] {Manifest.permission.CAMERA}, 1);
            }
        }

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