Question

我正在开发一个在GridView中显示WhatsApp状态图像的应用程序。启动应用程序时，它可以正确显示图像，但显示一些空白的网格。由于目录中有视频文件，所以我知道此空白的网格项，但是我不知道如何将图像文件与视频分开。我使用位图在网格上显示图像。因此它显示空白的gridview。我只需要在gridview上的图像。

这是我的MainActivity

public class MainActivity extends AppCompatActivity {
private String[] FilePathStrings;
private String[] FileNameStrings;
private File[] listFile;
GridView grid;
GridViewAdapter adapter;
File file;
String extension = ".jpg";
String TAG;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
        // Locate the image folder in your SD Card
        file = new File("/storage/emulated/0/WhatsApp/Media/.Statuses/");


    if (file.isDirectory()) {
        listFile = file.listFiles();

        // Create a String array for FilePathStrings
        FilePathStrings = new String[listFile.length];
        // Create a String array for FileNameStrings
        FileNameStrings = new String[listFile.length];


        for (int i = 0; i < listFile.length; i++) {
            if(listFile[i].getName().endsWith(extension)) {
                // Get the path of the image file
                FilePathStrings[i] = listFile[i].getAbsolutePath();
                // Get the name image file
                FileNameStrings[i] = listFile[i].getName();
            }
        }

    }

    // Locate the GridView in gridview_main.xml
    grid = (GridView) findViewById(R.id.gridview);
    grid.setColumnWidth(200);
    grid.setHorizontalSpacing(10);
    grid.setVerticalSpacing(10);
    grid.setNumColumns(2);
    grid.setStretchMode(GridView.STRETCH_SPACING_UNIFORM);
    // Pass String arrays to LazyAdapter Class
    adapter = new GridViewAdapter(this,FilePathStrings, FileNameStrings);
    // Set the LazyAdapter to the GridView
    grid.setAdapter(adapter);

这是我的GridViewAdapter

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class GridViewAdapter extends BaseAdapter{
private Activity activity;
private String[] filepath;
private String[] filename;

private static LayoutInflater inflater = null;

public GridViewAdapter(Activity a, String[] fpath, String[] fname) {
    activity = a;
    filepath = fpath;
    filename = fname;
    inflater = (LayoutInflater) activity
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

}

public int getCount() {
    return filepath.length;

}

public Object getItem(int position) {
    return position;
}

public long getItemId(int position) {
    return position;
}

public View getView(int position, View convertView, ViewGroup parent) {
    View vi = convertView;
    if (convertView == null)
        vi = inflater.inflate(R.layout.gridview_item, null);
    // Locate the TextView in gridview_item.xml
    TextView text = (TextView) vi.findViewById(R.id.text);
    // Locate the ImageView in gridview_item.xml
    ImageView image = (ImageView) vi.findViewById(R.id.image);

    // Set file name to the TextView followed by the position
    text.setText(filename[position]);

    // Decode the filepath with BitmapFactory followed by the position
    Bitmap bmp = BitmapFactory.decodeFile(filepath[position]);

    // Set the decoded bitmap into ImageView
    image.setImageBitmap(bmp);
    return vi;
}

}

Answer 1

我已经通过调试检查了您的代码，并且可以正常工作，但是您可以显示GridViewAdapter吗？

Answer 2

Note我已经使用recyclerview and RecyclerView adapter实现了此功能。

无需在单独的项目位置插入视频文件。您的ItemHolder应该有两个ImageViews。一个用于项，另一个用于Video Icon。最初Video Icon ImageView的可见度为Gone or Invisible。在适配器中绑定数据时，只需检查文件路径即可。如果文件的路径以视频扩展名结尾，则Video Icon ImageView的可见性应更改为“可见”。我在这里添加XML and item Holder's code。 Recyleriew项目

的XML代码

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/cv_status_item"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:background="@color/colorWhite">

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <com.github.siyamed.shapeimageview.RoundedImageView
        android:id="@+id/iv_status"
        android:layout_width="match_parent"
        android:layout_height="90dp"
        app:siRadius="6dp"
        app:siBorderColor="#dfdfdf"
        app:siBorderWidth="1dp"
        app:siSquare="true"

        />

    <ImageView
        android:id="@+id/iv_play_icon"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:layout_centerInParent="true"
        android:contentDescription="@null"
        android:visibility="gone"
        android:background="@drawable/toolbar_transparent"
        app:srcCompat="@drawable/float_video_play" />

    <android.support.v7.widget.AppCompatCheckBox
        android:id="@+id/cb_selection"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:visibility="gone" />
</RelativeLayout>
</RelativeLayout>

从ItemHolder到BindData的代码

 public void bindData(StatusObject statusObject, int position, int size, boolean selectionMode) {
    super.bindData(statusObject, position, size);
    this.selectionMode = selectionMode;
    if (statusObject.getPath().endsWith(".mp4")) {
        ivPlayIcon.setVisibility(View.VISIBLE);
    }
    else if (statusObject.getPath().endsWith(".gif")){
        ivPlayIcon.setVisibility(View.VISIBLE);
    }
    else ivPlayIcon.setVisibility(View.GONE);
    if (selectionMode)
        cbSelection.setVisibility(View.VISIBLE);
    else cbSelection.setVisibility(View.GONE);
    cbSelection.setChecked(statusObject.isSelected());
    cbSelection.setClickable(false);
    //        ivStatus.setClipToOutline(true);
    Glide.with(itemView)
            .asBitmap()
            .load(Uri.fromFile(new File(statusObject.getPath())))
            .into(ivStatus);
}

Android空白网格项目

2 个答案: