Question

我目前有一种方法可以从设备中获取所有视频并显示在listview中。目前，我只显示相册名称和标题，其缩略图的默认图像在listview的所有行中重复显示。这样做的方法是

    try {
        mAdapter = new SimpleCursorAdapter(
                this,
                // Use a template that displays a text view
                R.layout.media_select_row,
                null,
                // Map from database columns...
                new String[] {
                    MediaStore.Video.Media.ALBUM,
                    MediaStore.Video.Media.TITLE,
                    MediaStore.Video.Media._ID},
                    // To widget ids in the row layout...
                new int[] {
                    R.id.row_album,
                    R.id.row_title,
                    R.id.row_icon,},
                0);

        setListAdapter(mAdapter);

        getListView().setItemsCanFocus(true);

        // Normal click - open the editor
        getListView().setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView<?> parent,
                    View view,
                    int position,
                    long id) {

                Cursor c = mAdapter.getCursor();
                int dataIndex = c.getColumnIndexOrThrow(MediaStore.Video.Media.DATA);
                String filename = c.getString(dataIndex);

                videoFilename = filename;

                String substr = videoFilename.substring(videoFilename.length() - 3);

                if(substr.equals("mp4")) {
                    if(callPath == 1) {
                        Intent intent = new Intent(DubVideoList.this, DubStudio.class);
                        intent.putExtra("videoPath", videoFilename);
                        startActivity(intent);
                    }else if(callPath == 2){
                        Intent intent = new Intent(DubVideoList.this, DubStudioBeta.class);
                        intent.putExtra("videoPath", videoFilename);
                        startActivity(intent);
                    }
                }else{
                    Toast.makeText(DubVideoList.this,getString(R.string.mp4_support),Toast.LENGTH_LONG).show();
                }
            }
        });

        mInternalCursor = null;
        mExternalCursor = null;
        getLoaderManager().initLoader(INTERNAL_CURSOR_ID, null, this);
        getLoaderManager().initLoader(EXTERNAL_CURSOR_ID, null, this);

    } catch (SecurityException e) {
        // No permission to retrieve video?
        Log.e("SecurityError", e.toString());

        // TODO error 1
    } catch (IllegalArgumentException e) {
        // No permission to retrieve video?
        Log.e("IllegalArgument", e.toString());

        // TODO error 2
    }

    mAdapter.setViewBinder(new SimpleCursorAdapter.ViewBinder() {
        public boolean setViewValue(View view, Cursor cursor, int columnIndex) {
          if (view.getId() == R.id.row_icon) {
                setSoundIconFromCursor((ImageView) view, cursor);
                return true;
            }

            return false;
        }
    });

现在我需要用视频缩略图替换每个单元格的默认图像？有没有办法做到这一点？我也给了行XML作为参考。提前谢谢。

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content">

  <ImageView android:id="@+id/row_icon"
     android:gravity="center_vertical"
     android:layout_width="40dp"
     android:layout_height="40dp"
     android:layout_marginLeft="4dp"
      android:layout_marginTop="4dp"
      android:src="@drawable/filmicon"
      android:layout_gravity="center" />

    <LinearLayout
        android:orientation="vertical"
        android:layout_height="wrap_content"
        android:layout_marginTop="8dip"
        android:layout_marginBottom="8dip"
        android:layout_width="0px"
        android:layout_weight="1"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="4dip">

        <TextView android:id="@+id/row_title"
            android:textColor="#ff000000"
            android:textSize="18sp"
            android:singleLine="true"
            android:shadowColor="#999999"
            android:shadowDx="1"
            android:shadowDy="1"
            android:shadowRadius="1"
            android:layout_width="wrap_content"
            android:layout_height="0dip"
            android:layout_weight="1"/>

        <LinearLayout
         android:layout_width="fill_parent"
         android:layout_height="wrap_content">

            <TextView android:id="@+id/row_album"
            android:textColor="#ff1bbcff"
            android:textSize="12sp"
            android:singleLine="true"
            android:layout_width="0px"
            android:layout_height="wrap_content"
            android:layout_weight="1"/>

       </LinearLayout>

    </LinearLayout>

</LinearLayout>

Answer 1

要获取缩略图，您可以使用此代码

Bitmap thumb = ThumbnailUtils.createVideoThumbnail(video_path,
MediaStore.Images.Thumbnails.MINI_KIND);

Answer 2

使用此代码在列表视图中添加视频缩略图。

方法：1

位图bMap = ThumbnailUtils.createVideoThumbnail（“本地文件路径”， MediaStore.Video.Thumbnails.MINI_KIND）; MViewHolder.imageThumb.setImageBitmap（bMap）;

方法：2

使用滑行

编译'com.github.bumptech.glide：glide：3.7.0'

滑翔
.with（上下文） .load（Uri.fromFile（new File（filePath））） .into（MViewHolder.imageThumb）;

在ListView中获取视频缩略图和显示（仅限Android Genius）

2 个答案: