android调用相机录像保存并生成缩略图

1.权限申请参考https://blog.csdn.net/chailongger/article/details/104833783

private static final int TAKEVIDEO_FORESULT = 1001;private String videoPath;//视频保存后的路径/** * 调用相机录像 */private void takeVideo(){    Intent intent=new Intent(MediaStore.ACTION_VIDEO_CAPTURE);    Uri fileUri;    try {        //fileUri=Uri.fromFile(createMediaFile());如果这样写会报错        fileUri=         FileProvider.getUriForFile(getContext(),getActivity().getApplicationContext().getPackageName() + ".provider",createMediaFile());//这是正确的写法        intent.putExtra(MediaStore.EXTRA_OUTPUT,fileUri);        Logs.i("fileUri "+fileUri.toString());        Logs.i("打开录像机");    } catch (IOException e) {        e.printStackTrace();    }    //质量    intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY,1);    //限制时长    intent.putExtra(MediaStore.EXTRA_DURATION_LIMIT, 5);    //限制大小    intent.putExtra(MediaStore.EXTRA_SIZE_LIMIT, 1024*1024*20L);    startActivityForResult(intent,TAKEVIDEO_FORESULT);}@Override public void onActivityResult(int requestCode, int resultCode, Intent data) {    super.onActivityResult(requestCode, resultCode, data);    if(requestCode == TAKEVIDEO_FORESULT && resultCode == -1){//resultCode == 0 时表示取消        Logs.i("调用相机录像并保存");        if(videoPath != null){        Logs.i("videoPath "+videoPath);        //生成视频的缩略图        Bitmap bitmap = ThumbnailUtils.createVideoThumbnail(videoPath, MediaStore.Images.Thumbnails.MINI_KIND);        videoPath = videoPath.replace("/storage/emulated/0","");        videoPath = videoPath.replace("Video","Camera");        videoPath = videoPath.replace(".mp4",".jpg");        Logs.i("filepath " +videoPath);        File file = ConvertUtil.compressImage(bitmap,videoPath);        getActivity().sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.fromFile(file)));        ImageItem imageItem = new ImageItem();        imageItem.path = Environment.getExternalStorageDirectory()+videoPath;        selImageList.add(imageItem);        adapter.setImages(selImageList);    }}//创建并保存视频的方法private File createMediaFile() throws IOException {    if(checkSDCardAvaliable()) {    if ((Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))) {        // 选择自己的文件夹        String path = Environment.getExternalStorageDirectory().getPath() + "/DCIM/Video/";        File mediaStorageDir = new File(path);        if (!mediaStorageDir.exists()) {            if (!mediaStorageDir.mkdirs()) {                Logs.i("文件夹创建失败");                return null;            }        }        // 文件根据当前的时间给自己命名        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.CHINA);       String imageFileName = "VID_" + dateFormat.format(new Date(System.currentTimeMillis()));       String suffix = ".mp4";       Logs.i("path "+mediaStorageDir + File.separator + imageFileName + suffix);       videoPath = mediaStorageDir + File.separator + imageFileName + suffix;       File mediaFile = new File(mediaStorageDir + File.separator + imageFileName + suffix);       return mediaFile;       }    }    return null;}/** * 检查sd卡是否可用 * * @return */public static boolean checkSDCardAvaliable() {    if (Environment.getExternalStorageState() == Environment.MEDIA_REMOVED) {        return false;    }    return true;}

转换工具类

/** * 转换工具类 * 1. string转成bitmap * 2. bitmap转file */public class ConvertUtil {    /** * string转成bitmap *  * @param st */    public static Bitmap convertStringToIcon(String st) {        Bitmap bitmap = null;        try {            // out = new FileOutputStream("/sdcard/aa.jpg");            byte[] bitmapArray;            bitmapArray = Base64.decode(st, Base64.DEFAULT);            bitmap = BitmapFactory.decodeByteArray(bitmapArray, 0, bitmapArray.length);            // bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);            return bitmap;        } catch (Exception e) { return null; }    }    public static File compressImage(Bitmap bitmap,String filepath) {        //将要保存图片的路径filepath        File file = new File(Environment.getExternalStorageDirectory(), filepath);        try {            BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(file));            bitmap.compress(Bitmap.CompressFormat.JPEG, 100, bos);//            uploadPic(file);            bos.flush();            bos.close();        } catch (IOException e) {            e.printStackTrace();        }        return file;    }}

在applicationmanifest中添加fileprovider,android6.0以后读取或保存文件时需要用fileProvider进行转换。

provider_paths.xml

<?xml version="1.0" encoding="utf-8"?>

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