如何询问权限或在设置中自动设置手机全屏- android studio

<uses-permission android:name="android.permission.CAMERA" />

if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
    // 权限未被授予，需要询问用户
    ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, REQUEST_CAMERA_PERMISSION);
} else {
    // 权限已被授予，执行相应操作
    openCamera();
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    if (requestCode == REQUEST_CAMERA_PERMISSION) {
        if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            // 权限已被授予，执行相应操作
            openCamera();
        } else {
            // 权限被拒绝，处理相应逻辑
            Toast.makeText(this, "Camera permission denied", Toast.LENGTH_SHORT).show();
        }
    }
}

// 隐藏状态栏
getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
// 隐藏导航栏
getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE);

@Override
public void onWindowFocusChanged(boolean hasFocus) {
    super.onWindowFocusChanged(hasFocus);
    if (hasFocus) {
        // 隐藏状态栏
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
        // 隐藏导航栏
        getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE);
    }
}