安卓获取本地视频（指定文件下），并用listview显示出来

参考

android/安卓获取视频文件缩略图及时长

Android ListView 列表控件

在Android中如何获取视频的第一帧图片并显示在一个ImageView中

List集合循环添加对象会重复的原因及解决办法

思路

先使用listview显示一些简单的内容，只是这些内容是自己手动输入的。

然后获取视频的一些信息，替换掉自己手动输入的内容。

显示效果

核心代码

//获取指定文件夹下所有视频文件
    public static List<VideoInfo> getVideo(Context context, String fileAbsolutePath) {
        File file = new File(fileAbsolutePath);
        if (!file.exists()) {
            Toast.makeText(context, "文件夹不存在", Toast.LENGTH_SHORT).show();
            return null;
        }
        File[] subFile = file.listFiles();
        for (int iFileLength = 0; iFileLength < subFile.length; iFileLength++) {

　　　　　　VideoInfo info = new VideoInfo(); //必须放在for循环里面，不然会显示几个一样的

// 判断是否为文件夹
            if (!subFile[iFileLength].isDirectory()) {
                String filename = subFile[iFileLength].getName();
                System.out.println("----name = " + filename);
                Log.d(TAG, filename);
                Log.d(TAG, String.valueOf(iFileLength));

                // 判断是否为MP4结尾
                if (filename.trim().toLowerCase().endsWith(".mp4") || filename.trim().toLowerCase().endsWith(".3gp") ||
                        filename.trim().toLowerCase().endsWith(".avi") || filename.trim().toLowerCase().endsWith(".flv")) {

                    // 设置文件路径
                    info.setPath(subFile[iFileLength].getPath());
                    //Log.d(TAG, subFile[iFileLength].getPath()); ///storage/emulated/0/Android/data/com.example.video_list_demo1/cache/VID_20211229_074135.mp4

                    // 设置文件夹名称
                    info.setTitle(subFile[iFileLength].getName());
                    // Log.d(TAG, subFile[iFileLength].getName());  //VID_20211229_074135.mp4

                    //设置文件时长
                    MediaMetadataRetriever retriever = new MediaMetadataRetriever();
                    retriever.setDataSource(subFile[iFileLength].getPath());
                    //得到的数除1000得到秒，再把秒分为时分秒
                    int time = Integer.parseInt(retriever.extractMetadata
                            (MediaMetadataRetriever.METADATA_KEY_DURATION)) / 1000;
                    Integer hour = time / 60 / 60;
                    Integer minutes = time / 60 % 60;
                    Integer remainingSeconds = time % 60;
                    String duration = hour + "时" + minutes + "分" + remainingSeconds + "秒";
                    info.setDuration(duration);
                    Log.d(TAG, duration);
                    //0时0分22秒

                    //根据路径获得视频缩略图
                    Bitmap bitmap = retriever.getFrameAtTime();
                    info.setId(bitmap);
                    list.add( info);
                    Log.d(TAG, "onCreate: " + iFileLength+
                            "..."+list.get(iFileLength).getTitle());
                    //onCreate: 2...Health20211229083327complete.mp4
                }
            }
        }
        return list;
    }

全部代码

list_item.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">

    <!-- 定义一个用于显示头像的 ImageView -->
    <ImageView
        android:id="@+id/icon"
        android:layout_width="32dp"
        android:layout_height="32dp"
        android:baselineAlignBottom="true"
        android:paddingLeft="8dp" />

    <!-- 定义一个竖直方向的 LinearLayout,把 语言 与 简介 的文本框设置出来 -->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <TextView
            android:id="@+id/name"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:paddingLeft="8dp"
            android:textColor="#1D1D1C"
            android:textSize="20sp" />

        <TextView
            android:id="@+id/desc"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:paddingLeft="8px"
            android:textColor="#B4B4B9"
            android:textSize="14sp" />

    </LinearLayout>
</LinearLayout>

activity_main.xml

<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="8dp"
    android:orientation="vertical" >

    <ListView
        android:id="@+id/listview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
</LinearLayout>

 VideoInfo.java

package com.example.video_list_demo1;

import android.graphics.Bitmap;

public class VideoInfo {
    /**
     *
     */
    private static final long serialVersionUID = -7920222595800367956L;
    private Bitmap id;
    private String title;
    private String album;
    private String artist;
    private String displayName;
    private String mimeType;
    private String path;
    private long size;
    private String duration;


    /**
     *
     */
    public VideoInfo() {
        super();
    }



    private boolean isSelect;
    public boolean isSelect() {
        return isSelect;
    }

    public void setSelect(boolean isSelect) {
        this.isSelect = isSelect;
    }
    public VideoInfo (String aName, String aDesc, Bitmap aIcon) {
        this.title = aName;
        this.duration = aDesc;
        this.id = aIcon;
    }
    public VideoInfo(Bitmap id, String title, String album, String artist,
                     String displayName, String mimeType, String path, long size, String duration) {
        super();
        this.id = id;
        this.title = title;
        this.album = album;
        this.artist = artist;
        this.displayName = displayName;
        this.mimeType = mimeType;
        this.path = path;
        this.size = size;
        this.duration = duration;
    }

    public Bitmap getId() {
        return id;
    }

    public void setId(Bitmap id) {
        this.id = id;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getAlbum() {
        return album;
    }

    public void setAlbum(String album) {
        this.album = album;
    }

    public String getArtist() {
        return artist;
    }

    public void setArtist(String artist) {
        this.artist = artist;
    }

    public String getDisplayName() {
        return displayName;
    }

    public void setDisplayName(String displayName) {
        this.displayName = displayName;
    }

    public String getMimeType() {
        return mimeType;
    }

    public void setMimeType(String mimeType) {
        this.mimeType = mimeType;
    }

    public String getPath() {
        return path;
    }

    public void setPath(String path) {
        this.path = path;
    }

    public long getSize() {
        return size;
    }

    public void setSize(long size) {
        this.size = size;
    }

    public String getDuration() {
        return duration;
    }

    public void setDuration(String duration) {
        this.duration = duration;
    }

}

YetAdapter.java

package com.example.video_list_demo1;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.media.MediaMetadataRetriever;
import android.os.Bundle;
import android.os.FileUtils;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;

import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

public class MainActivity extends AppCompatActivity implements AdapterView.OnItemClickListener {

    private static String TAG = "xunyan";
    private static ArrayList<VideoInfo> list = new ArrayList<>();


    //获取指定文件夹下所有视频文件
    public static List<VideoInfo> getVideo(Context context, String fileAbsolutePath) {
        File file = new File(fileAbsolutePath);
        if (!file.exists()) {
            Toast.makeText(context, "文件夹不存在", Toast.LENGTH_SHORT).show();
            return null;
        }
        File[] subFile = file.listFiles();
        for (int iFileLength = 0; iFileLength < subFile.length; iFileLength++) {

            VideoInfo info = new VideoInfo(); //必须放在for循环里面，不然会显示几个一样的

            // 判断是否为文件夹
            if (!subFile[iFileLength].isDirectory()) {
                String filename = subFile[iFileLength].getName();
                System.out.println("----name = " + filename);
                Log.d(TAG, filename);
                Log.d(TAG, String.valueOf(iFileLength));

                // 判断是否为MP4结尾
                if (filename.trim().toLowerCase().endsWith(".mp4") || filename.trim().toLowerCase().endsWith(".3gp") ||
                        filename.trim().toLowerCase().endsWith(".avi") || filename.trim().toLowerCase().endsWith(".flv")) {

                    // 设置文件路径
                    info.setPath(subFile[iFileLength].getPath());
                    //Log.d(TAG, subFile[iFileLength].getPath()); ///storage/emulated/0/Android/data/com.example.video_list_demo1/cache/VID_20211229_074135.mp4

                    // 设置文件夹名称
                    info.setTitle(subFile[iFileLength].getName());
                    // Log.d(TAG, subFile[iFileLength].getName());  //VID_20211229_074135.mp4

                    //设置文件时长
                    MediaMetadataRetriever retriever = new MediaMetadataRetriever();
                    retriever.setDataSource(subFile[iFileLength].getPath());
                    //得到的数除1000得到秒，再把秒分为时分秒
                    int time = Integer.parseInt(retriever.extractMetadata
                            (MediaMetadataRetriever.METADATA_KEY_DURATION)) / 1000;
                    Integer hour = time / 60 / 60;
                    Integer minutes = time / 60 % 60;
                    Integer remainingSeconds = time % 60;
                    String duration = hour + "时" + minutes + "分" + remainingSeconds + "秒";
                    info.setDuration(duration);
                    Log.d(TAG, duration);
                    //0时0分22秒

                    //根据路径获得视频缩略图
                    Bitmap bitmap = retriever.getFrameAtTime();
                    info.setId(bitmap);
                    list.add( info);
                    Log.d(TAG, "onCreate: " + iFileLength+
                            "..."+list.get(iFileLength).getTitle());
                    //onCreate: 2...Health20211229083327complete.mp4


                }

            }
        }
        return list;
    }


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

        //清空list，防止反复添加
        list.clear();

        //获取外部文件所在地址：/storage/emulated/0/Android/data/com.example.video_list_demo1/cache
        String video_path = getExternalCacheDir().getAbsolutePath();


        //获取所有视频及其信息，保存到list中
        getVideo(this, video_path);

         /*
       //单例测试
        info = new VideoInfo();
        info.setTitle("111");
        info.setDuration("222");
        info.setId(bitmap);
        list.add(info);*/



        //创建一个 YetAdapter
        ListView listView = (ListView) findViewById(R.id.listview);
        YetAdapter yetAdapter = new YetAdapter((ArrayList<VideoInfo>) list, getApplicationContext());
        listView.setAdapter(yetAdapter);
        listView.setOnItemClickListener(this);


    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        Toast.makeText(getApplicationContext(), "你点击了第" + position + "项", Toast.LENGTH_SHORT).show();
        //点击跳转到播放界面
//        Intent intent
    }
}