Android 选择本地视频 android获取本地视频列表

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我是数据分析师 2023-08-09 17:25:52

文章标签 Android 选择本地视频移动开发数据库 java ide 文章分类 Android 移动开发

1、获取本地所有视频

public void getLoadMedia() {
        Cursor cursor = UILApplication.instance.getApplicationContext().getContentResolver().query(MediaStore.Video.Media.EXTERNAL_CONTENT_URI, null, null, null, MediaStore.Video.Media.DEFAULT_SORT_ORDER);
        try {
            for (cursor.moveToFirst(); !cursor.isAfterLast(); cursor.moveToNext()) {
                int id = cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Video.Media._ID)); // id
                String displayName =cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.TITLE));
                String album = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.ALBUM)); // 专辑
                String artist = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.ARTIST)); // 艺术家
                String title = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DISPLAY_NAME)); // 显示名称
                String mimeType =cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.MIME_TYPE));
                String path = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA)); // 路径
                long duration = cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DURATION)); // 时长
                long size = cursor.getLong(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.SIZE)); // 大小
                String resolution =cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.RESOLUTION));
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            cursor.close();
        }
    }

2、获取拍照视频

//create new Intent
            Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
            try {
                fileUri = Uri.fromFile(createMediaFile()); // create a file to save the video
            } catch (IOException e) {
                e.printStackTrace();
            }
            intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);  // set the image file name
            intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1); // set the video image quality to high
            // start the Video Capture Intent
            startActivityForResult(intent, CAPTURE_VIDEO_ACTIVITY_REQUEST_CODE);

public static final String[] videoCursorCols = new String[] { MediaStore.Video.Media._ID, MediaStore.Video.Media.DISPLAY_NAME, MediaStore.Video.Media.TITLE, MediaStore.Video.Media.DURATION, MediaStore.Video.Media.ARTIST, MediaStore.Video.Media.ALBUM, MediaStore.Video.Media.RESOLUTION, MediaStore.Video.Media.MIME_TYPE, MediaStore.Video.Media.SIZE, MediaStore.Video.Media.DATA };

    public static Video fileUriForVideo(Activity activity, Uri uri) {

        Cursor cursor = activity.getContentResolver().query(uri, videoCursorCols, null, null, null);

        if (cursor == null || cursor.getCount() == 0) {
            return null;
        } else {

            Video video = new Video();
            cursor.moveToFirst();
            /* file name */
            if (cursor.getString(1) != null) {
                video.setName(cursor.getString(1));
            }
            /* media name */
            if (cursor.getString(2) != null) {
             　　video.setDisplayName(cursor.getString(2));
            }
            /* play duration */
            if (cursor.getString(3) != null) {
                video.setTimelong((cursor.getInt(3) / 1000) + "s");
            }
            /* artist */
            if (cursor.getString(4) != null) {
                video.setSinger(cursor.getString(4));
            }
            /* album */
            if (cursor.getString(5) != null) {
                video.setAlbum(cursor.getString(5));
            }
            /* resolution */
            if (cursor.getString(6) != null) {
                video.setResolution(cursor.getString(6));
            }
            /* media type */
            if (cursor.getString(7) != null) {
                video.setMimeType(cursor.getString(7).trim());
            }
            /* media size */
            if (cursor.getString(8) != null) {
                video.setDownfilesize(new java.text.DecimalFormat("#.00").format((cursor.getInt(8) / 1024.0 / 1024.0)) + " MB");

            }
            /* media file path */
            if (cursor.getString(9) != null) {
                video.setVoiceurl(cursor.getString(9));
            }
            if (cursor != null) {
                cursor.close();
            }
            return video;
        }
    }

播放视频

private void initView() {
        String url="http://ivi.bupt.edu.cn/hls/cctv6hd.m3u8";
        VideoView videoView=findViewById(R.id.mVideoView);
        videoView.setVideoPath(url);
        videoView.requestFocus();
        videoView.start();
}

1、开始录制

首先实例化一个MediaRecord对象，对其中开始设置。我在这里遇到的问题是时音频文件的存储位置。代码中getCacheDir得到的是内部缓存目录，这个目录可以通过file exploer看到，具体在data/data/app名称/cache。file exploer在windows->show view->other中找到。先打开它，在启动模拟器，刚开始启动时可以发现窗口中出现文件列表。

private void StartAudio(){//开始录制         
         recorder = new MediaRecorder();  
         recorder.setAudioSource(MediaRecorder.AudioSource.MIC);//从麦克风采集声音  
         recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); //内容输出格式  
         recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);  
    
         //输出到缓存目录，此处可以添加上传录音的功能，也可以存到其他位置   
         audioFile = new File(getCacheDir(), "recoder"+ "_" + System.currentTimeMillis() + ".3gp");  
         recorder.setOutputFile(audioFile.getAbsolutePath());  
         try {  
             recorder.prepare();  
         } catch (IOException e) {  
             e.printStackTrace();  
         }  
         recorder.start();  
         record=true;  
         Log.i(tag,"开始录制！");  
         StartButton.setEnabled(false);
          StopButton.setEnabled(true);    
          PlayButton.setEnabled(false);
    }

2、结束录制

一开始运行时stop函数出现各种问题，后来总结可能是start函数根本没有运行。可惜我也是刚接触它，并不熟悉过程。之后查了很多文章，可以用Log.i进行输出，大致相当于C++中的printf函数。所以一定是要在start之后才能stop。

private void StopAudio(){    //结束录制
        recorder.stop();        
        //recorder.reset();   //14:19添加修改
        recorder.release();
        Log.i(tag,"停止录制！");  
        record=false;
 
        //更新状态
        //PlayButton.setEnabled(true);
        StartButton.setEnabled(true);
        StopButton.setEnabled(false);        
        PlayButton.setEnabled(true);
    }

private void PlayAudio(){
        player = new MediaPlayer();  
            try {  
                player.setDataSource(audioFile.getAbsolutePath());  
                player.prepare();  
                player.start();  
            } catch (IOException e) {  
                e.printStackTrace();  
            }      
         StartButton.setEnabled(true);
         StopButton.setEnabled(false);    
         PlayButton.setEnabled(false);
    }

1.从本地相册获取照片：

一般就是写出这个方法

protected void getImageFromAlbum() {  
    Intent intent = new Intent(Intent.ACTION_PICK);  
    intent.setType("image/*");//相片类型  
    startActivityForResult(intent, REQUEST_CODE_PICK_IMAGE);  
}

2.从照相机获取照片

一般就是写出这个方法