CoordinatorLayout có nghĩa là bố cục điều phối, thường được sử dụng làm bố cục gốc. Dưới đây là hai cách sử dụng phổ biến của layout này.

Một, Kết hợp với Floating Action Button

<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/test_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="onTestClick"
        android:text="Kiểm tra"/>

    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end"/>

</androidx.coordinatorlayout.widget.CoordinatorLayout>

Khi nhấn nút "Kiểm tra", một SnackBar sẽ xuất hiện:

import com.google.android.material.snackbar.Snackbar;

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

public void onTestClick(View view){
    Snackbar.make(view, "Đây là một snackBar", Snackbar.LENGTH_LONG).show();
}

Hai, ToolBar và RecyclerView

<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <com.google.android.material.appbar.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <androidx.appcompat.widget.Toolbar
            android:id="@+id/custom_toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            app:layout_scrollFlags="scroll|enterAlways"/>
    </com.google.android.material.appbar.AppBarLayout>

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/items_list"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
</androidx.coordinatorlayout.widget.CoordinatorLayout>

Code xử lý:

import androidx.appcompat.widget.Toolbar;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

public class SecondActivity extends AppCompatActivity {

    private Toolbar mToolbar;
    private RecyclerView mRecyclerView;
    private List<String> mData = new ArrayList<>();

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

        mToolbar = findViewById(R.id.custom_toolbar);
        mRecyclerView = findViewById(R.id.items_list);

        for (int i = 0; i < 50; i++) {
            mData.add("Dữ liệu kiểm tra --- " + i);
        }

        LinearLayoutManager layoutManager = new LinearLayoutManager(this);
        layoutManager.setOrientation(LinearLayoutManager.VERTICAL);

        mRecyclerView.setLayoutManager(layoutManager);
        mRecyclerView.setAdapter(new RecyclerView.Adapter<MyViewHolder>() {
            @Override
            public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
                View view = LayoutInflater.from(SecondActivity.this)
                        .inflate(android.R.layout.simple_list_item_1, parent, false);
                return new MyViewHolder(view);
            }

            @Override
            public void onBindViewHolder(MyViewHolder holder, int position) {
                holder.itemText.setText(mData.get(position));
            }

            @Override
            public int getItemCount() {
                return mData.size();
            }
        });
    }

    static class MyViewHolder extends RecyclerView.ViewHolder {
        TextView itemText;

        MyViewHolder(View itemView) {
            super(itemView);
            itemText = itemView.findViewById(android.R.id.text1);
        }
    }
}

Ba, Hiệu ứng cuộn hình ảnh giống QQ Space

<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <com.google.android.material.appbar.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="200dp">

        <com.google.android.material.appbar.CollapsingToolbarLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:contentScrim="@color/colorPrimary"
            app:layout_scrollFlags="scroll|exitUntilCollapsed">

            <ImageView
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                app:layout_collapseMode="parallax"
                app:layout_collapseParallaxMultiplier="0.7"
                android:scaleType="centerCrop"
                android:src="@drawable/sample_image"/>

            <androidx.appcompat.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"/>

        </com.google.android.material.appbar.CollapsingToolbarLayout>
    </com.google.android.material.appbar.AppBarLayout>

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
</androidx.coordinatorlayout.widget.CoordinatorLayout>