Question

我为我的列表视图创建了一个自定义数组适配器，但是由于某种原因，数据没有显示在列表视图项中。当我将log语句放入扩展ArrayAdapter的自定义适配器的getView方法中时，甚至连日志猫也什么都不显示。这是持有列表视图的活动

public class booktable extends AppCompatActivity {
    ListView mylv;
    int[] array = new int[5];

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_booktable);
        mylv = findViewById(R.id.mylv);
        array = new int[]{1, 0, 0, 0, 1};

        ListAdapter la = new customadapter(getApplicationContext(),R.layout.activity_booktable,array);
        mylv.setAdapter(la);

   } 
}

这是我的自定义适配器

public class customadapter extends ArrayAdapter {
    LayoutInflater li;
    int[] table = new int[5];

    public customadapter(@NonNull Context context,int resource, int [] array) {
        super(context,resource);
        li = LayoutInflater.from(context);
        table = array;

    }

    @NonNull
    @Override
    public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
        View v  = li.inflate(R.layout.custom_row,parent);
        ImageView img = v.findViewById(R.id.img);
        TextView tv = v.findViewById(R.id.tv);
        if(table[position]==0)
        {
            tv.setText("FULL");
            tv.setTextColor(Color.RED);
        }
        if(table[position]==1)
        {
            tv.setText("AVAILABLE");
            tv.setTextColor(Color.GREEN);
        }
        return v;
    }
}

Answer 1

尝试将参数数组或集合传递给ArrayAdapter构造函数，如下所示：

<?php
include '../include/connect.php';
$id =(int)$_GET['id'];
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
        <title>Untitled Document</title>
    </head>
<body>
<form action="upload.php" method="post" enctype="multipart/form-data">
    <input type="file" name="file_img" />
    <input type="hidden" name="id" value="<?php echo $id;?>" />
    <input type="submit" name="btn_upload" value="Upload">
</form>    
<?php
if(isset($_POST['btn_upload']))
{
    $filetmp = $_FILES["file_img"]["tmp_name"];
    $filename = $_FILES["file_img"]["name"];
    $filetype = $_FILES["file_img"]["type"];
    $filepath = "photo/".$filename;
    $id = $_POST['id'];

    move_uploaded_file($filetmp,$filepath);
    $sql = "INSERT INTO upload_img (img_name,img_path,img_type,im_id) VALUES ('$filename','$filepath','$filetype','.$id.')";
    mysqli_query($con, $sql);
}
?>
</body>
</html>

列表视图不会显示来自自定义阵列适配器的项目

1 个答案: