安卓开发调用系统相机拍照，并且对照片编辑添加文字，然后照片储存到Room数据库之中，并获取相册路径，在recyclerview中显示出来

实现这个功能需要以下几个步骤：

1. 添加相机权限和读写外部存储权限到AndroidManifest.xml文件中

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

2. 在布局文件中添加一个ImageView用于显示照片，一个EditText用于输入文字，一个Button用于拍照和保存照片

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="match_parent">

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scaleType="centerCrop"/>

    <EditText
        android:id="@+id/editText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:padding="16dp"/>

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Take Photo"
        android:layout_above="@id/editText"
        android:layout_centerHorizontal="true"/>

</RelativeLayout>

3. 在Activity中实现拍照逻辑：

首先，定义一个变量用于存储照片路径，然后在onCreate方法中初始化相机和图片存储路径：

private String photoPath;
private static final int REQUEST_IMAGE_CAPTURE = 1;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // Initialize camera and photo path
    File photoFile = null;
    try {
        photoFile = createImageFile();
    } catch (IOException ex) {
        // Error occurred while creating the File
        ex.printStackTrace();
    }
    if (photoFile != null) {
        photoPath = photoFile.getAbsolutePath();
        Uri photoURI = FileProvider.getUriForFile(this,
                "com.example.android.fileprovider",
                photoFile);
        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
        if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
            startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
        }
    }
}

// Create a unique file name for the photo
private File createImageFile() throws IOException {
    // Create an image file name
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
    String imageFileName = "JPEG_" + timeStamp + "_";
    File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
    File image = File.createTempFile(
            imageFileName,  /* prefix */
            ".jpg",         /* suffix */
            storageDir      /* directory */
    );

    // Save a file: path for use with ACTION_VIEW intents
    return image;
}

接着，在onActivityResult方法中获取拍摄的照片并显示在ImageView中：

@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
        Bitmap bitmap = BitmapFactory.decodeFile(photoPath);
        ImageView imageView = findViewById(R.id.imageView);
        imageView.setImageBitmap(bitmap);
    }
}

最后，在Button的点击事件中获取EditText的文本内容并添加到图片上，然后保存到Room数据库中并更新RecyclerView：

private AppDatabase db;
private List<Photo> photoList;
private PhotoAdapter adapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // Initialize database and RecyclerView
    db = Room.databaseBuilder(getApplicationContext(),
            AppDatabase.class, "photo-database").build();
    photoList = new ArrayList<>();
    adapter = new PhotoAdapter(photoList);
    RecyclerView recyclerView = findViewById(R.id.recyclerView);
    recyclerView.setLayoutManager(new LinearLayoutManager(this));
    recyclerView.setAdapter(adapter);

    // Set button click listener
    Button button = findViewById(R.id.button);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            EditText editText = findViewById(R.id.editText);
            String text = editText.getText().toString();
            Bitmap bitmap = BitmapFactory.decodeFile(photoPath);
            Bitmap newBitmap = addTextToBitmap(bitmap, text);
            saveToDatabase(newBitmap);
            updateRecyclerView();
            editText.setText("");
        }
    });
}

// Add text to the bottom of the bitmap
private Bitmap addTextToBitmap(Bitmap bitmap, String text) {
    Bitmap newBitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true);
    Canvas canvas = new Canvas(newBitmap);
    Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
    paint.setColor(Color.WHITE);
    paint.setTextSize(48);
    paint.setTextAlign(Paint.Align.CENTER);
    Rect bounds = new Rect();
    paint.getTextBounds(text, 0, text.length(), bounds);
    int x = canvas.getWidth() / 2;
    int y = canvas.getHeight() - bounds.height() - 64;
    canvas.drawText(text, x, y, paint);
    return newBitmap;
}

// Save the photo to database
private void saveToDatabase(Bitmap bitmap) {
    ByteArrayOutputStream stream = new ByteArrayOutputStream();
    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
    byte[] bytes = stream.toByteArray();
    Photo photo = new Photo(bytes);
    db.photoDao().insert(photo);
}

// Update the RecyclerView with new data from database
private void updateRecyclerView() {
    photoList.clear();
    photoList.addAll(db.photoDao().getAll());
    adapter.notifyDataSetChanged();
}

完整的代码可以在GitHub上查看：https://github.com/guolindev/Android-Camera-Room。