version:

update:增加刷新，更换背景颜色
fix bug:

app/build.gradle

@@ -16,7 +16,7 @@ android {
         multiDexEnabled true
         ndk {
             // add support lib
-            abiFilters 'armeabi-v7a' //, 'arm64-v8a'//, "mips"  //,'armeabi''x86',, 'x86_64',
+            abiFilters /*"armeabi",*/ "armeabi-v7a", "arm64-v8a", "x86"/*, "x86_64", "mips", "mips64"*/
         }
 
         lintOptions {
@@ -71,6 +71,7 @@ dependencies {
     androidTestImplementation 'androidx.test.ext:junit:1.1.2'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
     implementation 'androidx.recyclerview:recyclerview:1.1.0'
+    implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0'
 
     implementation 'com.github.bumptech.glide:glide:4.11.0'
     annotationProcessor 'com.github.bumptech.glide:compiler:4.11.0'
@@ -87,11 +88,12 @@ dependencies {
     implementation 'com.danikula:videocache:2.7.0'
     implementation 'com.aliyun.sdk.android:AliyunPlayer:4.5.0-full'
     implementation 'com.alivc.conan:AlivcConan:0.9.5'
-    implementation 'com.scwang.smart:refresh-layout-kernel:2.0.1'
+//    implementation 'com.scwang.smart:menu_refresh-layout-kernel:2.0.1'
-    implementation 'com.scwang.smart:refresh-header-material:2.0.1'
+//    implementation 'com.scwang.smart:menu_refresh-header-material:2.0.1'
-    implementation 'com.scwang.smart:refresh-footer-classics:2.0.1'
+//    implementation 'com.scwang.smart:menu_refresh-footer-classics:2.0.1'
     implementation 'tv.danmaku.ijk.media:ijkplayer-java:0.8.8'
     implementation 'tv.danmaku.ijk.media:ijkplayer-armv7a:0.8.4'
     debugImplementation 'com.squareup.leakcanary:leakcanary-android:2.3'
+    implementation 'com.github.SheHuan:NiceImageView:1.0.5'
     implementation project(path: ':library')
 }

app/src/main/java/com/uiui/videoplayer/activity/MainActivity.java

@@ -1,26 +1,42 @@
 package com.uiui.videoplayer.activity;
 
 import androidx.annotation.NonNull;
+import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.core.app.ActivityCompat;
 import androidx.core.content.ContextCompat;
 import androidx.recyclerview.widget.DefaultItemAnimator;
 import androidx.recyclerview.widget.RecyclerView;
+import androidx.recyclerview.widget.SimpleItemAnimator;
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
 
 import android.Manifest;
 import android.content.pm.ActivityInfo;
 import android.content.pm.PackageManager;
 import android.content.res.Configuration;
+import android.content.res.Resources;
+import android.graphics.Color;
+import android.graphics.PorterDuff;
+import android.graphics.drawable.Drawable;
 import android.os.AsyncTask;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Environment;
+import android.text.SpannableString;
+import android.text.Spanned;
+import android.text.style.ForegroundColorSpan;
 import android.util.Log;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.WindowManager;
+import android.widget.TextView;
 
 import com.uiui.videoplayer.R;
 import com.uiui.videoplayer.base.RecycleGridLayoutManager;
 import com.uiui.videoplayer.base.SpacesItemDecoration;
 import com.uiui.videoplayer.adapter.VideoAdapter;
+import com.uiui.videoplayer.utils.ToastUtil;
 
 import java.io.File;
 import java.util.ArrayList;
@@ -32,9 +48,12 @@ public class MainActivity extends AppCompatActivity {
     String[] permissions = new String[]{Manifest.permission.READ_EXTERNAL_STORAGE,
             Manifest.permission.WRITE_EXTERNAL_STORAGE};
     private RecyclerView recyclerView;
+    private TextView tips;
+    private SwipeRefreshLayout refreshLayout;
     private VideoAdapter adapter;
     private RecycleGridLayoutManager mManager;
 
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -68,7 +87,19 @@ public class MainActivity extends AppCompatActivity {
     }
 
     private void initView() {
+        initActionBar();
+        tips = findViewById(R.id.tips);
+        refreshLayout = findViewById(R.id.swipeRefreshLayout);
+        refreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
+            @Override
+            public void onRefresh() {
+                ScanTask scanTask = new ScanTask();
+                scanTask.execute();
+            }
+        });
+        refreshLayout.setRefreshing(true);
         recyclerView = findViewById(R.id.recyclerView);
+        ((SimpleItemAnimator) recyclerView.getItemAnimator()).setSupportsChangeAnimations(false);
         int orientation = getResources().getConfiguration().orientation;
         if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
             mManager = new RecycleGridLayoutManager(MainActivity.this, 3);
@@ -82,6 +113,34 @@ public class MainActivity extends AppCompatActivity {
         ((DefaultItemAnimator) recyclerView.getItemAnimator()).setSupportsChangeAnimations(false);
     }
 
+    private void initActionBar() {
+        setToolbarCustomTheme();
+        //显示返回按钮
+        ActionBar actionBar = getSupportActionBar();
+        if (actionBar != null) {
+            actionBar.setHomeButtonEnabled(true);
+            actionBar.setDisplayHomeAsUpEnabled(true);
+            SpannableString spannableString = new SpannableString(getString(R.string.app_name));
+            ForegroundColorSpan colorSpan = new ForegroundColorSpan(getResources().getColor(R.color.defaultColor));
+            spannableString.setSpan(colorSpan, 0, spannableString.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
+            actionBar.setTitle(spannableString);
+        }
+        // 系统 6.0 以上 状态栏白底黑字的实现方法
+        getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);
+    }
+
+    //自定义颜色返回按钮
+    protected void setToolbarCustomTheme() {
+        Drawable upArrow = ContextCompat.getDrawable(this, R.drawable.abc_ic_ab_back_material);
+        if (upArrow != null) {
+            upArrow.setColorFilter(ContextCompat.getColor(this, R.color.defaultColor), PorterDuff.Mode.SRC_ATOP);
+            if (getSupportActionBar() != null) {
+                getSupportActionBar().setHomeAsUpIndicator(upArrow);
+            }
+        }
+    }
+
+
     //    private String[] getFolder(String folderPath) {
 //
 //    }
@@ -123,7 +182,7 @@ public class MainActivity extends AppCompatActivity {
     }
 
     private static final String[] extension = new String[]{
-            ".3gp", ".avi", ".flv", ".mkv", ".mov", ".mp4",  ".webm"
+            ".3gp", ".avi", ".flv", ".mkv", ".mov", ".mp4", ".webm"
     };
 
     private static boolean isVideoFormat(String filePath) {
@@ -186,9 +245,17 @@ public class MainActivity extends AppCompatActivity {
         protected void onPostExecute(List<String> strings) {
             super.onPostExecute(strings);
             Log.e("ScanTask", "onPostExecute: " + strings);
-            adapter = new VideoAdapter(MainActivity.this, strings);
+            if (strings.size() == 0) {
+                tips.setVisibility(View.VISIBLE);
+                recyclerView.setVisibility(View.GONE);
+            } else {
+                tips.setVisibility(View.GONE);
+                recyclerView.setVisibility(View.VISIBLE);
+                adapter = new VideoAdapter(MainActivity.this, strings);
 //            recyclerView.setLayoutManager(new LinearLayoutManager(MainActivity.this));
-            recyclerView.setAdapter(adapter);
+                recyclerView.setAdapter(adapter);
+            }
+            refreshLayout.setRefreshing(false);
         }
     }
 
@@ -219,4 +286,42 @@ public class MainActivity extends AppCompatActivity {
         }
     }
 
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        getMenuInflater().inflate(R.menu.main, menu);
+        return super.onCreateOptionsMenu(menu);
+    }
+
+
+    /**
+     * 监听标题栏按钮点击事件.
+     *
+     * @param item 按钮
+     * @return 结果
+     */
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        //返回按钮点击事件
+        switch (item.getItemId()) {
+            case android.R.id.home:
+                if (System.currentTimeMillis() - mPreClickTime > 1000) {
+                    ToastUtil.show("再按一次，退出");
+                    mPreClickTime = System.currentTimeMillis();
+                } else {
+                    finish();
+                }
+                break;
+            case R.id.refresh:
+                refreshLayout.setRefreshing(true);
+                ScanTask scanTask = new ScanTask();
+                scanTask.execute();
+                break;
+        }
+
+        return super.onOptionsItemSelected(item);
+    }
+
+    private long mPreClickTime;
+
+
 }

app/src/main/java/com/uiui/videoplayer/adapter/VideoAdapter.java

@@ -21,6 +21,7 @@ import androidx.constraintlayout.widget.ConstraintLayout;
 import androidx.recyclerview.widget.RecyclerView;
 
 import com.bumptech.glide.Glide;
+import com.shehuan.niv.NiceImageView;
 import com.uiui.videoplayer.R;
 import com.uiui.videoplayer.activity.ActivityTikTok;
 import com.uiui.videoplayer.utils.ToastUtil;
@@ -153,6 +154,11 @@ public class VideoAdapter extends RecyclerView.Adapter<VideoAdapter.VideoHolder>
         return name;
     }
 
+    @Override
+    public int getItemViewType(int position) {
+        return position;
+    }
+
     /**
      * 判断Activity是否Destroy
      *
@@ -168,7 +174,7 @@ public class VideoAdapter extends RecyclerView.Adapter<VideoAdapter.VideoHolder>
     }
 
     static class VideoHolder extends RecyclerView.ViewHolder {
-        ImageView video_image;
+        NiceImageView video_image;
         TextView title, duration;
         ConstraintLayout root;
 

app/src/main/res/layout-land/activity_main.xml

@@ -1,16 +1,33 @@
 <?xml version="1.0" encoding="utf-8"?>
 <androidx.constraintlayout.widget.ConstraintLayout 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"
     tools:context=".activity.MainActivity">
 
-    <androidx.recyclerview.widget.RecyclerView
+    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
-        android:id="@+id/recyclerView"
+        android:id="@+id/swipeRefreshLayout"
         android:layout_width="match_parent"
-        android:layout_height="match_parent">
+        android:layout_height="match_parent"
+        >
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/recyclerView"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            >
+
+        </androidx.recyclerview.widget.RecyclerView>
+
+        <TextView
+            android:id="@+id/tips"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:gravity="center"
+            android:text="没有找到视频文件"
+            android:textColor="@color/defaultColor"
+            android:visibility="gone" />
+    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
 
-    </androidx.recyclerview.widget.RecyclerView>
 
 </androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout-port/activity_main.xml

@@ -1,16 +1,34 @@
 <?xml version="1.0" encoding="utf-8"?>
 <androidx.constraintlayout.widget.ConstraintLayout 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"
     tools:context=".activity.MainActivity">
 
-    <androidx.recyclerview.widget.RecyclerView
+    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
-        android:id="@+id/recyclerView"
+        android:id="@+id/swipeRefreshLayout"
         android:layout_width="match_parent"
-        android:layout_height="match_parent">
+        android:layout_height="match_parent"
+        android:background="@color/white"
+        >
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/recyclerView"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            >
+
+        </androidx.recyclerview.widget.RecyclerView>
+
+        <TextView
+            android:id="@+id/tips"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:gravity="center"
+            android:text="没有找到视频文件"
+            android:textColor="@color/defaultColor"
+            android:visibility="gone" />
+    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
 
-    </androidx.recyclerview.widget.RecyclerView>
 
 </androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/item_videofile.xml

@@ -6,15 +6,18 @@
     android:layout_height="wrap_content"
     android:gravity="center">
 
-    <ImageView
+    <com.shehuan.niv.NiceImageView
         android:id="@+id/video_image"
         android:layout_width="288dp"
         android:layout_height="162dp"
         android:layout_marginTop="4dp"
         android:adjustViewBounds="true"
-        android:background="@color/black"
         android:scaleType="fitCenter"
+        app:is_cover_src="true"
+        app:corner_radius="5dp"
+        android:background="@color/black"
         app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.504"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 

app/src/main/res/menu/main.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item
+        android:id="@+id/refresh"
+        android:icon="@drawable/menu_refresh"
+        app:showAsAction="ifRoom"
+        android:title="TODO" />
+</menu>

app/src/main/res/values/colors.xml

@@ -5,5 +5,5 @@
     <color name="colorAccent">#03DAC5</color>
     <color name="white">#FFFFFF</color>
     <color name="black">#000000</color>
-
+    <color name="defaultColor">#333333</color>
 </resources>

app/src/main/res/values/styles.xml

@@ -3,9 +3,11 @@
     <!-- Base application theme. -->
     <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
         <!-- Customize your theme here. -->
-        <item name="colorPrimary">@color/colorPrimary</item>
+        <item name="colorPrimary">@color/white</item>
-        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
+        <item name="colorPrimaryDark">@color/white</item>
-        <item name="colorAccent">@color/colorAccent</item>
+        <item name="colorAccent">@color/defaultColor</item>
     </style>
 
+
+
 </resources>