BottomSheetDialog example

MainActivity.java

@Override
protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button button = (Button) findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                openDialog();
            }
        });
}

private void openDialog() {
        View view = getLayoutInflater().inflate(R.layout.sheet_main, null);
        dialog = new BottomSheetDialog(this);
        dialog.setContentView(view);
        TextView camera_sel = (TextView) view.findViewById(R.id.camera);
        TextView gallery_sel = (TextView) view.findViewById(R.id.gallery);
        camera_sel.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                takePhotoFromCamera();
                dialog.dismiss();
            }
        });
        gallery_sel.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                takePhotoFromGallery();
                dialog.dismiss();
            }
        });
        dialog.show();
}

sheet_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    android:padding="4dp">

    <TextView
        android:id="@+id/camera"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:background="?attr/selectableItemBackgroundBorderless"
        android:clickable="true"
        android:drawablePadding="8dp"
        android:drawableTop="@drawable/ic_camera"
        android:gravity="center_horizontal"
        android:padding="16dp"
        android:text="Camera"
        android:textSize="18sp" />

    <TextView
        android:id="@+id/gallery"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:background="?attr/selectableItemBackgroundBorderless"
        android:clickable="true"
        android:drawablePadding="8dp"
        android:drawableTop="@drawable/ic_panorama"
        android:gravity="center_horizontal"
        android:padding="16dp"
        android:text="Gallery"
        android:textSize="18sp" />

</LinearLayout>