Android 在gridview中显示视频和照片以及视频的持续时间

*这是我的画廊活动*

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_share);
    //setupBottomNavigationView();
    directories = new ArrayList<>();
    directorySpinner = (Spinner)findViewById(R.id.spinnerDirectory);
    mProgressbar = (LottieAnimationView)findViewById(R.id.mprogressbar);
    galleryImage = (ImageView)findViewById(R.id.galleryImageView);
    gridView = (GridView)findViewById(R.id.shareGridView);

    back = (LottieAnimationView)findViewById(R.id.share_activity_back);

    back.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Log.d(TAG, "onClick: navigating back ");
            finish();
        }
    });

    takephoto = (Button)findViewById(R.id.Camera_take_photo);
    takephoto.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (checkPermissions(Permissions.CAMERA_PERMISSION[0])){
                Log.d(TAG, "onClick: starting camera");
                Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                startActivityForResult(cameraIntent,CAMERA_REQUEST_CODE);

            }else {


            }
        }
    });

    if (checkPermissionsArray(Permissions.PERMISSIONS)){

    }else{
        verifyPermissions(Permissions.PERMISSIONS);

    }
    init();

}
public void verifyPermissions(String[] permissions){
    Log.d(TAG, "verifyPermissions: verifying permissions.");

    ActivityCompat.requestPermissions(
            ShareActivity.this,
            permissions,
            VERIFY_PERMISSIONS_REQUEST
    );
}

/**
 * Check an array of permissions
 * @param permissions
 * @return
 */
public boolean checkPermissionsArray(String[] permissions){
    Log.d(TAG, "checkPermissionsArray: checking permissions array.");

    for(int i = 0; i< permissions.length; i++){
        String check = permissions[i];
        if(!checkPermissions(check)){
            return false;
        }
    }
    return true;
}

/**
 * Check a single permission is it has been verified
 * @param permission
 * @return
 */
public boolean checkPermissions(String permission){
    Log.d(TAG, "checkPermissions: checking permission: " + permission);

    int permissionRequest = ActivityCompat.checkSelfPermission(ShareActivity.this, permission);

    if(permissionRequest != PackageManager.PERMISSION_GRANTED){
        Log.d(TAG, "checkPermissions: \n Permission was not granted for: " + permission);
        Toast.makeText(mContext, " Please allow the permission \n for reading your external storage", Toast.LENGTH_LONG).show();
        return false;
    }
    else{
        Log.d(TAG, "checkPermissions: \n Permission was granted for: " + permission);
        return true;
    }

}
private  void setupBottomNavigationView(){
    Log.d(TAG, "setupBottomNavigationView: setting up bottam navigation view");
    BottomNavigationViewEx bottomNavigationViewEx = (BottomNavigationViewEx)findViewById(R.id.bottom_nav_viewbar);
    BottomNavigationViewHelper.setupBottomNavigationView(bottomNavigationViewEx);
    BottomNavigationViewHelper.enableNAvigation(mContext,bottomNavigationViewEx);
    Menu menu = bottomNavigationViewEx.getMenu();
    MenuItem menuItem = menu.getItem(ACTIVITY_NUM);
    menuItem.setChecked(true);
}
private void init(){
    FilePaths filePaths = new FilePaths();
    if (FileSearch.getDirectoryPaths(filePaths.PICTURES) != null){
        directories = FileSearch.getDirectoryPaths(filePaths.PICTURES);
    }
    directories.add(filePaths.CAMERA);
    directories.add(filePaths.VEDIO);
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(mContext,android.R.layout.simple_spinner_item,directories);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    directorySpinner.setAdapter(adapter);
    directorySpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
            setupGridView(directories.get(position));
        }
        @Override
        public void onNothingSelected(AdapterView<?> parent) {

        }
    });
}
private void setupGridView(String selectedDirectory){
    Log.d(TAG, "setupGridView: directory chosen: " + selectedDirectory);
    final ArrayList<String> imgURLs = FileSearch.getFilePaths(selectedDirectory);
    //set the grid column width
    int gridWidth = getResources().getDisplayMetrics().widthPixels;
    int imageWidth = gridWidth/NUM_GRID_COLUMNS;
    gridView.setColumnWidth(imageWidth);
    //use the grid adapter to adapter the images to gridview
    GridImageAdapter adapter = new GridImageAdapter(mContext, R.layout.layout_gridview, mAppend, imgURLs);
    gridView.setAdapter(adapter);
    //set the first image to be displayed when the activity fragment view is inflated
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == CAMERA_REQUEST_CODE){
        Log.d(TAG, "onActivityResult: done taking photo");
        Log.d(TAG, "onActivityResult: attempting to take it to final share screen ");
        Toast.makeText(mContext, "One more step to publish this photo ", Toast.LENGTH_SHORT).show();
    }
}

---

如果您知道返回文件的类型，如jpg、png、mp4等，请帮助您从过去的6个小时中解决此问题。然后您可以在自定义GridImageAdapter中区分它。在图像项目xml文件中，您可以创建另一个

ImageView

，在每个项目的中心放置一个播放图标。如果是图像文件，此图标将被隐藏，但是，如果有视频文件，则可以在自定义适配器中显示此图标

此外，您还需要获取视频的持续时间，为此，您可以使用

MediaMetadataRetriever

，如下所示：

MediaMetadataRetriever retriever = new MediaMetadataRetriever();
//use one of overloaded setDataSource() functions to set your data source
retriever.setDataSource(context, Uri.fromFile(videoFile));
String time = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION);
long timeInMillisec = Long.parseLong(time );

retriever.release()

---

你知道每个文件的类型吗？你在说什么？？？是的，我知道我想获取videoMediaMetadataRetriever的持续时间，它可以用来获取视频的持续时间。请查看更新的回答法赫德·亚辛谢谢！！如果你能接受我的回答，我将不胜感激：）非常感谢

    //"storage/emulated/0"
    public String ROOT_DIR = Environment.getExternalStorageDirectory().getPath();
    public String PICTURES = ROOT_DIR + "/Pictures";
    public String CAMERA = ROOT_DIR + "/DCIM/camera";
    //public String VEDIO = ROOT_DIR + "/videos";
    public String FIREBASE_STORY_STORAGE = "stories/users";
    public String FIREBASE_IMAGE_STORAGE = "photos/users/";

}

MediaMetadataRetriever retriever = new MediaMetadataRetriever();
//use one of overloaded setDataSource() functions to set your data source
retriever.setDataSource(context, Uri.fromFile(videoFile));
String time = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION);
long timeInMillisec = Long.parseLong(time );

retriever.release()