diff --git a/build.gradle b/build.gradle
index 25708c2..b098f46 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,16 +1,14 @@
 ext {
-	supportLibraryVersion = '28.0.0'
-
-	minSdkVersion = 17
-	targetSdkVersion = 28
-	versionCode = 8
-	versionName = "0.2.3"
+    minSdkVersion = 17
+    targetSdkVersion = 28
+    versionCode = 9
+    versionName = "0.2.4"
 }
 
 buildscript {
     repositories {
         jcenter()
-	    google()
+        google()
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:3.3.1'
@@ -20,7 +18,7 @@ buildscript {
 allprojects {
     repositories {
         jcenter()
-	    google()
+        google()
         maven { url 'https://jitpack.io' }
     }
 }
diff --git a/demo/build.gradle b/demo/build.gradle
index d241dde..cd07c8e 100644
--- a/demo/build.gradle
+++ b/demo/build.gradle
@@ -20,7 +20,7 @@ android {
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
-    implementation "com.android.support:appcompat-v7:$supportLibraryVersion"
-    implementation "com.android.support:design:$supportLibraryVersion"
+    implementation "androidx.appcompat:appcompat:1.0.2"
+    implementation "com.google.android.material:material:1.1.0-alpha04"
     implementation project(':library')
 }
diff --git a/demo/src/main/java/moe/feng/common/view/breadcrumbs/App.java b/demo/src/main/java/moe/feng/common/view/breadcrumbs/App.java
index fa4255d..f98258a 100644
--- a/demo/src/main/java/moe/feng/common/view/breadcrumbs/App.java
+++ b/demo/src/main/java/moe/feng/common/view/breadcrumbs/App.java
@@ -1,10 +1,10 @@
 package moe.feng.common.view.breadcrumbs;
 
 import android.app.Application;
-import android.support.v7.app.AppCompatDelegate;
 
-public class App extends Application
-{
+import androidx.appcompat.app.AppCompatDelegate;
+
+public class App extends Application {
     @Override
     public void onCreate() {
         super.onCreate();
diff --git a/demo/src/main/java/moe/feng/common/view/breadcrumbs/FileManagerAdapter.java b/demo/src/main/java/moe/feng/common/view/breadcrumbs/FileManagerAdapter.java
index 2498a9d..73fecd2 100644
--- a/demo/src/main/java/moe/feng/common/view/breadcrumbs/FileManagerAdapter.java
+++ b/demo/src/main/java/moe/feng/common/view/breadcrumbs/FileManagerAdapter.java
@@ -1,11 +1,12 @@
 package moe.feng.common.view.breadcrumbs;
 
-import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ImageView;
 import android.widget.TextView;
+
+import androidx.recyclerview.widget.RecyclerView;
 import moe.feng.common.view.breadcrumbs.model.FileList;
 import moe.feng.common.view.breadcrumbs.demo.R;
 
diff --git a/demo/src/main/java/moe/feng/common/view/breadcrumbs/MainActivity.java b/demo/src/main/java/moe/feng/common/view/breadcrumbs/MainActivity.java
index 55211ff..1ca1458 100644
--- a/demo/src/main/java/moe/feng/common/view/breadcrumbs/MainActivity.java
+++ b/demo/src/main/java/moe/feng/common/view/breadcrumbs/MainActivity.java
@@ -4,18 +4,19 @@
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.os.Bundle;
-import android.support.design.widget.CoordinatorLayout;
-import android.support.design.widget.Snackbar;
-import android.support.v4.app.ActivityCompat;
-import android.support.v4.content.ContextCompat;
-import android.support.v7.app.AppCompatActivity;
-import android.support.v7.widget.Toolbar;
 import android.view.View;
 
+import com.google.android.material.snackbar.Snackbar;
+
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.Toolbar;
+import androidx.coordinatorlayout.widget.CoordinatorLayout;
+import androidx.core.app.ActivityCompat;
+import androidx.core.content.ContextCompat;
 import moe.feng.common.view.breadcrumbs.demo.R;
 import moe.feng.common.view.breadcrumbs.model.BreadcrumbItem;
 
diff --git a/demo/src/main/java/moe/feng/common/view/breadcrumbs/SimpleFileManagerActivity.java b/demo/src/main/java/moe/feng/common/view/breadcrumbs/SimpleFileManagerActivity.java
index 5c88eeb..0221b9a 100644
--- a/demo/src/main/java/moe/feng/common/view/breadcrumbs/SimpleFileManagerActivity.java
+++ b/demo/src/main/java/moe/feng/common/view/breadcrumbs/SimpleFileManagerActivity.java
@@ -3,134 +3,137 @@
 import android.os.AsyncTask;
 import android.os.Bundle;
 import android.os.Environment;
-import android.support.design.widget.Snackbar;
-import android.support.v7.app.AppCompatActivity;
-import android.support.v7.widget.RecyclerView;
-import android.support.v7.widget.Toolbar;
+
+import com.google.android.material.snackbar.Snackbar;
+
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.Toolbar;
+import androidx.recyclerview.widget.RecyclerView;
+import moe.feng.common.view.breadcrumbs.demo.R;
 import moe.feng.common.view.breadcrumbs.model.BreadcrumbItem;
 import moe.feng.common.view.breadcrumbs.model.FileList;
-import moe.feng.common.view.breadcrumbs.demo.R;
 
 public class SimpleFileManagerActivity extends AppCompatActivity {
 
-	private BreadcrumbsView mBreadcrumbsView;
-	private RecyclerView mRecyclerView;
-	private FileManagerAdapter mAdapter;
-
-	private String currentLocation;
-
-	@Override
-	protected void onCreate(Bundle savedInstanceState) {
-		super.onCreate(savedInstanceState);
-		setContentView(R.layout.activity_simple_file_manager);
-		Toolbar toolbar = findViewById(R.id.toolbar);
-		setSupportActionBar(toolbar);
-
-		mRecyclerView = findViewById(R.id.recycler_view);
-		mBreadcrumbsView = findViewById(R.id.breadcrumbs_view);
-
-		mAdapter = new FileManagerAdapter();
-		mRecyclerView.setAdapter(mAdapter);
-		mAdapter.setCallback(new FileManagerAdapter.Callback() {
-			@Override
-			public void onItemClick(FileList.FileWrapper file) {
-				if (file.isDirectory()) {
-					BreadcrumbItem breadcrumbItem = new BreadcrumbItem(mAdapter.getFileList().getDirectoriesString());
-					breadcrumbItem.setSelectedItem(file.toString());
-					currentLocation = getCurrentPath() + "/" + file.toString();
-					new LoadTask(breadcrumbItem).execute(currentLocation);
-				} else if (file.isFile()) {
-					// Nothing happen lol
-				}
-			}
-		});
-
-		mBreadcrumbsView.setCallback(new DefaultBreadcrumbsCallback<BreadcrumbItem>() {
-			@Override
-			public void onNavigateBack(BreadcrumbItem item, int position) {
-				currentLocation = getPath(position);
-				new LoadTask().execute(currentLocation);
-			}
-
-			@Override
-			public void onNavigateNewLocation(BreadcrumbItem newItem, int changedPosition) {
-				currentLocation = getPath(changedPosition - 1) + "/" + newItem.getSelectedItem();
-				new LoadTask().execute(currentLocation);
-			}
-		});
-
-		if (savedInstanceState == null) {
-			mBreadcrumbsView.addItem(BreadcrumbItem.createSimpleItem("External Storage"));
-			currentLocation = getCurrentPath();
-			new LoadTask().execute(currentLocation);
-		}
-	}
-
-	@Override
-	public void onRestoreInstanceState(Bundle savedInstanceState) {
-		super.onRestoreInstanceState(savedInstanceState);
-		currentLocation = getCurrentPath();
-		new LoadTask().execute(currentLocation);
-	}
-
-	private String getCurrentPath() {
-		return getPath(-1);
-	}
-
-	private String getPath(int depth) {
-		if (depth == -1) depth = mBreadcrumbsView.getItems().size() - 1;
-		StringBuffer sb = new StringBuffer(Environment.getExternalStorageDirectory().getAbsolutePath());
-		for (int i = 1; i <= depth; i++) {
-			sb.append("/").append(mBreadcrumbsView.getItems().get(i).getSelectedItem());
-		}
-		return sb.toString();
-	}
-
-	@Override
-	public void onBackPressed() {
-		if (mBreadcrumbsView.getItems().size() > 1) {
-			mBreadcrumbsView.removeLastItem();
-			currentLocation = getCurrentPath();
-			new LoadTask().execute(currentLocation);
-		} else {
-			super.onBackPressed();
-		}
-	}
-
-	private class LoadTask extends AsyncTask<String, Void, FileList> {
-
-		private BreadcrumbItem nextItem;
-
-		LoadTask() {}
-
-		LoadTask(BreadcrumbItem nextItem) {
-			this.nextItem = nextItem;
-		}
-
-		@Override
-		protected FileList doInBackground(String... path) {
-			try {
-				return FileList.newInstance(path[0]);
-			} catch (Exception e) {
-				e.printStackTrace();
-			}
-			return null;
-		}
-
-		@Override
-		protected void onPostExecute(FileList list) {
-			if (list != null) {
-				mAdapter.setFileList(list);
-				mAdapter.notifyDataSetChanged();
-				if (nextItem != null) {
-					mBreadcrumbsView.addItem(nextItem);
-				}
-			} else if (nextItem != null) {
-				Snackbar.make(findViewById(R.id.coordinator_layout), "Something wrong", Snackbar.LENGTH_SHORT)
-						.show();
-			}
-		}
-
-	}
+    private BreadcrumbsView mBreadcrumbsView;
+    private RecyclerView mRecyclerView;
+    private FileManagerAdapter mAdapter;
+
+    private String currentLocation;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_simple_file_manager);
+        Toolbar toolbar = findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
+
+        mRecyclerView = findViewById(R.id.recycler_view);
+        mBreadcrumbsView = findViewById(R.id.breadcrumbs_view);
+
+        mAdapter = new FileManagerAdapter();
+        mRecyclerView.setAdapter(mAdapter);
+        mAdapter.setCallback(new FileManagerAdapter.Callback() {
+            @Override
+            public void onItemClick(FileList.FileWrapper file) {
+                if (file.isDirectory()) {
+                    BreadcrumbItem breadcrumbItem = new BreadcrumbItem(mAdapter.getFileList().getDirectoriesString());
+                    breadcrumbItem.setSelectedItem(file.toString());
+                    currentLocation = getCurrentPath() + "/" + file.toString();
+                    new LoadTask(breadcrumbItem).execute(currentLocation);
+                } else if (file.isFile()) {
+                    // Nothing happen lol
+                }
+            }
+        });
+
+        mBreadcrumbsView.setCallback(new DefaultBreadcrumbsCallback<BreadcrumbItem>() {
+            @Override
+            public void onNavigateBack(BreadcrumbItem item, int position) {
+                currentLocation = getPath(position);
+                new LoadTask().execute(currentLocation);
+            }
+
+            @Override
+            public void onNavigateNewLocation(BreadcrumbItem newItem, int changedPosition) {
+                currentLocation = getPath(changedPosition - 1) + "/" + newItem.getSelectedItem();
+                new LoadTask().execute(currentLocation);
+            }
+        });
+
+        if (savedInstanceState == null) {
+            mBreadcrumbsView.addItem(BreadcrumbItem.createSimpleItem("External Storage"));
+            currentLocation = getCurrentPath();
+            new LoadTask().execute(currentLocation);
+        }
+    }
+
+    @Override
+    public void onRestoreInstanceState(Bundle savedInstanceState) {
+        super.onRestoreInstanceState(savedInstanceState);
+        currentLocation = getCurrentPath();
+        new LoadTask().execute(currentLocation);
+    }
+
+    private String getCurrentPath() {
+        return getPath(-1);
+    }
+
+    private String getPath(int depth) {
+        if (depth == -1) depth = mBreadcrumbsView.getItems().size() - 1;
+        StringBuffer sb = new StringBuffer(Environment.getExternalStorageDirectory().getAbsolutePath());
+        for (int i = 1; i <= depth; i++) {
+            sb.append("/").append(mBreadcrumbsView.getItems().get(i).getSelectedItem());
+        }
+        return sb.toString();
+    }
+
+    @Override
+    public void onBackPressed() {
+        if (mBreadcrumbsView.getItems().size() > 1) {
+            mBreadcrumbsView.removeLastItem();
+            currentLocation = getCurrentPath();
+            new LoadTask().execute(currentLocation);
+        } else {
+            super.onBackPressed();
+        }
+    }
+
+    private class LoadTask extends AsyncTask<String, Void, FileList> {
+
+        private BreadcrumbItem nextItem;
+
+        LoadTask() {
+        }
+
+        LoadTask(BreadcrumbItem nextItem) {
+            this.nextItem = nextItem;
+        }
+
+        @Override
+        protected FileList doInBackground(String... path) {
+            try {
+                return FileList.newInstance(path[0]);
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+            return null;
+        }
+
+        @Override
+        protected void onPostExecute(FileList list) {
+            if (list != null) {
+                mAdapter.setFileList(list);
+                mAdapter.notifyDataSetChanged();
+                if (nextItem != null) {
+                    mBreadcrumbsView.addItem(nextItem);
+                }
+            } else if (nextItem != null) {
+                Snackbar.make(findViewById(R.id.coordinator_layout), "Something wrong", Snackbar.LENGTH_SHORT)
+                        .show();
+            }
+        }
+
+    }
 
 }
diff --git a/demo/src/main/res/layout/activity_main.xml b/demo/src/main/res/layout/activity_main.xml
index 19770c1..e718b94 100644
--- a/demo/src/main/res/layout/activity_main.xml
+++ b/demo/src/main/res/layout/activity_main.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/coordinator_layout"
@@ -8,13 +8,13 @@
     android:fitsSystemWindows="true"
     tools:context="moe.feng.common.view.breadcrumbs.MainActivity">
 
-    <android.support.design.widget.AppBarLayout
+    <com.google.android.material.appbar.AppBarLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:background="?attr/colorPrimary"
         android:theme="@style/AppTheme.AppBarOverlay">
 
-        <android.support.v7.widget.Toolbar
+        <androidx.appcompat.widget.Toolbar
             android:id="@+id/toolbar"
             android:layout_width="match_parent"
             android:layout_height="?attr/actionBarSize"
@@ -29,8 +29,8 @@
             app:textColorUnSelected="@color/colorUnSelected"
             app:textSizeCustom="12sp" />
 
-    </android.support.design.widget.AppBarLayout>
+    </com.google.android.material.appbar.AppBarLayout>
 
     <include layout="@layout/content_main" />
 
-</android.support.design.widget.CoordinatorLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
diff --git a/demo/src/main/res/layout/activity_simple_file_manager.xml b/demo/src/main/res/layout/activity_simple_file_manager.xml
index 0feaed1..a66c302 100644
--- a/demo/src/main/res/layout/activity_simple_file_manager.xml
+++ b/demo/src/main/res/layout/activity_simple_file_manager.xml
@@ -1,40 +1,39 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout
-		xmlns:android="http://schemas.android.com/apk/res/android"
-		xmlns:app="http://schemas.android.com/apk/res-auto"
-		xmlns:tools="http://schemas.android.com/tools"
-		android:layout_width="match_parent"
-		android:layout_height="match_parent"
-		android:fitsSystemWindows="true"
-		android:id="@+id/coordinator_layout"
-		tools:context="moe.feng.common.view.breadcrumbs.SimpleFileManagerActivity">
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/coordinator_layout"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:fitsSystemWindows="true"
+    tools:context="moe.feng.common.view.breadcrumbs.SimpleFileManagerActivity">
 
-	<android.support.design.widget.AppBarLayout
-			android:layout_height="wrap_content"
-			android:layout_width="match_parent"
-			android:theme="@style/AppTheme.AppBarOverlay"
-			android:background="?attr/colorPrimary">
+    <com.google.android.material.appbar.AppBarLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="?attr/colorPrimary"
+        android:theme="@style/AppTheme.AppBarOverlay">
 
-		<android.support.v7.widget.Toolbar
-				android:id="@+id/toolbar"
-				android:layout_width="match_parent"
-				android:layout_height="?attr/actionBarSize"
-				app:popupTheme="@style/AppTheme.PopupOverlay"
-				app:layout_scrollFlags="scroll|enterAlways"/>
+        <androidx.appcompat.widget.Toolbar
+            android:id="@+id/toolbar"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            app:layout_scrollFlags="scroll|enterAlways"
+            app:popupTheme="@style/AppTheme.PopupOverlay" />
 
-		<moe.feng.common.view.breadcrumbs.BreadcrumbsView
-				android:id="@+id/breadcrumbs_view"
-				android:layout_width="match_parent"
-				android:layout_height="wrap_content"
-				app:popupTheme="@style/AppTheme.PopupOverlay"/>
+        <moe.feng.common.view.breadcrumbs.BreadcrumbsView
+            android:id="@+id/breadcrumbs_view"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            app:popupTheme="@style/AppTheme.PopupOverlay" />
 
-	</android.support.design.widget.AppBarLayout>
+    </com.google.android.material.appbar.AppBarLayout>
 
-	<android.support.v7.widget.RecyclerView
-			android:id="@+id/recycler_view"
-			android:layout_width="match_parent"
-			android:layout_height="match_parent"
-			app:layoutManager="android.support.v7.widget.LinearLayoutManager"
-			app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/recycler_view"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior" />
 
-</android.support.design.widget.CoordinatorLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
diff --git a/demo/src/main/res/layout/content_main.xml b/demo/src/main/res/layout/content_main.xml
index 34c278b..cb08279 100644
--- a/demo/src/main/res/layout/content_main.xml
+++ b/demo/src/main/res/layout/content_main.xml
@@ -1,30 +1,29 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout
-		xmlns:android="http://schemas.android.com/apk/res/android"
-		xmlns:tools="http://schemas.android.com/tools"
-		xmlns:app="http://schemas.android.com/apk/res-auto"
-		android:id="@+id/content_main"
-		android:layout_width="match_parent"
-		android:layout_height="match_parent"
-		android:orientation="vertical"
-		android:paddingLeft="@dimen/activity_horizontal_margin"
-		android:paddingRight="@dimen/activity_horizontal_margin"
-		android:paddingTop="@dimen/activity_vertical_margin"
-		android:paddingBottom="@dimen/activity_vertical_margin"
-		app:layout_behavior="@string/appbar_scrolling_view_behavior"
-		tools:showIn="@layout/activity_main"
-		tools:context="moe.feng.common.view.breadcrumbs.MainActivity">
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/content_main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingBottom="@dimen/activity_vertical_margin"
+    app:layout_behavior="@string/appbar_scrolling_view_behavior"
+    tools:context="moe.feng.common.view.breadcrumbs.MainActivity"
+    tools:showIn="@layout/activity_main">
 
-	<Button
-			android:layout_width="wrap_content"
-			android:layout_height="wrap_content"
-			android:id="@+id/btn_add_more"
-			android:text="Add more"/>
+    <Button
+        android:id="@+id/btn_add_more"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Add more" />
 
-	<Button
-			android:layout_width="wrap_content"
-			android:layout_height="wrap_content"
-			android:id="@+id/btn_simple_file_manager"
-			android:text="Simple File Manager"/>
+    <Button
+        android:id="@+id/btn_simple_file_manager"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Simple File Manager" />
 
 </LinearLayout>
diff --git a/demo/src/main/res/layout/file_manager_item.xml b/demo/src/main/res/layout/file_manager_item.xml
index e4bc51a..a4a29d9 100644
--- a/demo/src/main/res/layout/file_manager_item.xml
+++ b/demo/src/main/res/layout/file_manager_item.xml
@@ -1,36 +1,36 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-              xmlns:tools="http://schemas.android.com/tools"
-              android:orientation="horizontal"
-              android:layout_width="match_parent"
-              android:layout_height="wrap_content"
-              android:gravity="center_vertical"
-              android:clickable="true"
-              android:foreground="?android:attr/selectableItemBackground"
-			  android:padding="16dp">
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:clickable="true"
+    android:foreground="?android:attr/selectableItemBackground"
+    android:gravity="center_vertical"
+    android:orientation="horizontal"
+    android:padding="16dp">
 
-	<ImageView
-			android:id="@+id/file_icon"
-			android:layout_width="wrap_content"
-			android:layout_height="wrap_content"
-			android:layout_marginStart="8dp"
-			android:layout_marginEnd="16dp"
-			android:src="@drawable/ic_folder_black_24dp"/>
+    <ImageView
+        android:id="@+id/file_icon"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="8dp"
+        android:layout_marginEnd="16dp"
+        app:srcCompat="@drawable/ic_folder_black_24dp" />
 
-	<LinearLayout
-			android:layout_width="0dp"
-			android:layout_height="wrap_content"
-			android:layout_weight="1"
-			android:layout_marginStart="16dp"
-			android:orientation="vertical">
+    <LinearLayout
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="16dp"
+        android:layout_weight="1"
+        android:orientation="vertical">
 
-		<TextView
-				android:id="@+id/file_name"
-				android:layout_width="wrap_content"
-				android:layout_height="wrap_content"
-				android:textAppearance="@android:style/TextAppearance.Material.Body2"
-				tools:text="Title"/>
+        <TextView
+            android:id="@+id/file_name"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            tools:text="Title" />
 
-	</LinearLayout>
+    </LinearLayout>
 
 </LinearLayout>
\ No newline at end of file
diff --git a/gradle.properties b/gradle.properties
index 2427fd0..664fe80 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1 +1,3 @@
-org.gradle.jvmargs=-Xmx1536m
\ No newline at end of file
+org.gradle.jvmargs=-Xmx1536m
+android.useAndroidX=true
+android.enableJetifier=true
\ No newline at end of file
diff --git a/library/build.gradle b/library/build.gradle
index 3f0989b..0d9fab7 100644
--- a/library/build.gradle
+++ b/library/build.gradle
@@ -19,6 +19,6 @@ android {
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
-    implementation "com.android.support:appcompat-v7:$supportLibraryVersion"
-    implementation "com.android.support:recyclerview-v7:$supportLibraryVersion"
+    implementation "androidx.appcompat:appcompat:1.0.2"
+    implementation "androidx.recyclerview:recyclerview:1.0.0"
 }
diff --git a/library/src/main/java/moe/feng/common/view/breadcrumbs/BreadcrumbsAdapter.java b/library/src/main/java/moe/feng/common/view/breadcrumbs/BreadcrumbsAdapter.java
index c7e6434..8e2dc83 100644
--- a/library/src/main/java/moe/feng/common/view/breadcrumbs/BreadcrumbsAdapter.java
+++ b/library/src/main/java/moe/feng/common/view/breadcrumbs/BreadcrumbsAdapter.java
@@ -3,12 +3,6 @@
 import android.content.Context;
 import android.graphics.drawable.Drawable;
 import android.os.Build;
-import android.support.annotation.IdRes;
-import android.support.annotation.NonNull;
-import android.support.annotation.Nullable;
-import android.support.annotation.RequiresApi;
-import android.support.v4.graphics.drawable.DrawableCompat;
-import android.support.v7.widget.RecyclerView;
 import android.util.TypedValue;
 import android.view.ContextThemeWrapper;
 import android.view.LayoutInflater;
@@ -27,6 +21,12 @@
 import java.util.List;
 import java.util.Map;
 
+import androidx.annotation.IdRes;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.annotation.RequiresApi;
+import androidx.core.graphics.drawable.DrawableCompat;
+import androidx.recyclerview.widget.RecyclerView;
 import moe.feng.common.view.breadcrumbs.model.IBreadcrumbItem;
 
 class BreadcrumbsAdapter extends RecyclerView.Adapter<BreadcrumbsAdapter.ItemHolder> {
diff --git a/library/src/main/java/moe/feng/common/view/breadcrumbs/BreadcrumbsCallback.java b/library/src/main/java/moe/feng/common/view/breadcrumbs/BreadcrumbsCallback.java
index 9b0dd9c..76fa561 100644
--- a/library/src/main/java/moe/feng/common/view/breadcrumbs/BreadcrumbsCallback.java
+++ b/library/src/main/java/moe/feng/common/view/breadcrumbs/BreadcrumbsCallback.java
@@ -1,6 +1,6 @@
 package moe.feng.common.view.breadcrumbs;
 
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
 
 /**
  * Interface definition for a callback to be invoked when BreadcrumbsView's item was clicked or changed.
diff --git a/library/src/main/java/moe/feng/common/view/breadcrumbs/BreadcrumbsView.java b/library/src/main/java/moe/feng/common/view/breadcrumbs/BreadcrumbsView.java
index 76643f3..859a852 100644
--- a/library/src/main/java/moe/feng/common/view/breadcrumbs/BreadcrumbsView.java
+++ b/library/src/main/java/moe/feng/common/view/breadcrumbs/BreadcrumbsView.java
@@ -4,10 +4,6 @@
 import android.content.res.TypedArray;
 import android.os.Bundle;
 import android.os.Parcelable;
-import android.support.annotation.NonNull;
-import android.support.annotation.Nullable;
-import android.support.v7.widget.LinearLayoutManager;
-import android.support.v7.widget.RecyclerView;
 import android.util.AttributeSet;
 import android.view.ViewGroup;
 import android.widget.FrameLayout;
@@ -15,6 +11,10 @@
 import java.util.ArrayList;
 import java.util.List;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
 import moe.feng.common.view.breadcrumbs.model.IBreadcrumbItem;
 
 public class BreadcrumbsView extends FrameLayout {
diff --git a/library/src/main/java/moe/feng/common/view/breadcrumbs/ViewUtils.java b/library/src/main/java/moe/feng/common/view/breadcrumbs/ViewUtils.java
index afa6677..a84596a 100644
--- a/library/src/main/java/moe/feng/common/view/breadcrumbs/ViewUtils.java
+++ b/library/src/main/java/moe/feng/common/view/breadcrumbs/ViewUtils.java
@@ -3,13 +3,14 @@
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.Color;
-import android.support.annotation.AttrRes;
-import android.support.annotation.ColorInt;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.FrameLayout;
 import android.widget.ListAdapter;
 
+import androidx.annotation.AttrRes;
+import androidx.annotation.ColorInt;
+
 class ViewUtils {
 
 	/**
@@ -29,7 +30,8 @@ static boolean isRtlLayout(Context context) {
 	 * @param attr The resource id of color attribute
 	 * @return Result
 	 */
-	@ColorInt static int getColorFromAttr(Context context, @AttrRes int attr) {
+	@ColorInt
+	static int getColorFromAttr(Context context, @AttrRes int attr) {
 		TypedArray array = context.getTheme().obtainStyledAttributes(new int[]{attr});
 		int color = array.getColor(0, Color.TRANSPARENT);
 		array.recycle();
diff --git a/library/src/main/java/moe/feng/common/view/breadcrumbs/model/BreadcrumbItem.java b/library/src/main/java/moe/feng/common/view/breadcrumbs/model/BreadcrumbItem.java
index 040b487..b3e10fa 100644
--- a/library/src/main/java/moe/feng/common/view/breadcrumbs/model/BreadcrumbItem.java
+++ b/library/src/main/java/moe/feng/common/view/breadcrumbs/model/BreadcrumbItem.java
@@ -1,12 +1,13 @@
 package moe.feng.common.view.breadcrumbs.model;
 
 import android.os.Parcel;
-import android.support.annotation.NonNull;
 
 import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
 
+import androidx.annotation.NonNull;
+
 public class BreadcrumbItem implements IBreadcrumbItem<String> {
 
 	private int mSelectedIndex = -1;
diff --git a/library/src/main/java/moe/feng/common/view/breadcrumbs/model/IBreadcrumbItem.java b/library/src/main/java/moe/feng/common/view/breadcrumbs/model/IBreadcrumbItem.java
index cd060eb..cacdd89 100644
--- a/library/src/main/java/moe/feng/common/view/breadcrumbs/model/IBreadcrumbItem.java
+++ b/library/src/main/java/moe/feng/common/view/breadcrumbs/model/IBreadcrumbItem.java
@@ -1,10 +1,11 @@
 package moe.feng.common.view.breadcrumbs.model;
 
 import android.os.Parcelable;
-import android.support.annotation.NonNull;
 
 import java.util.List;
 
+import androidx.annotation.NonNull;
+
 public interface IBreadcrumbItem<E> extends Parcelable, Iterable {
 
     /**
@@ -33,7 +34,8 @@ public interface IBreadcrumbItem<E> extends Parcelable, Iterable {
      *
      * @return The selected item
      */
-    @NonNull E getSelectedItem();
+    @NonNull
+    E getSelectedItem();
 
     /**
      * Check if there are other items
@@ -52,7 +54,7 @@ public interface IBreadcrumbItem<E> extends Parcelable, Iterable {
     /**
      * Set a new items list with selecting a item
      *
-     * @param items Items list
+     * @param items         Items list
      * @param selectedIndex The selected item index
      */
     void setItems(@NonNull List<E> items, int selectedIndex);