如何将 3 个不同的 arrayAdapter 合并为一个？

Question

    List pdfFiles = new ArrayList();
    List directories = new ArrayList();
    List otherFiles = new ArrayList();

    /* Code to populate them */

    ArrayAdapter pdfFilesArrayAdapter = new ArrayAdapter(this, R.layout.pdf_files, pdfFiles);
    ArrayAdapter otherFilesArrayAdapter = new ArrayAdapter(this, R.layout.other_files, otherFiles);
    ArrayAdapter directoriesArrayAdapter = new ArrayAdapter(this, R.layout.directories, directories);

请注意，它们使用三种不同类型的 TextView 布局。 现在我有一个 ListView...

    ListView listView = (ListView) findViewById(R.id.list);

我想将所有适配器添加到这个 listView。如何将它们合二为一？

Answer 1

如果您不想使用库，则可以在适配器类中传递键值和管理

ArrayAdapter pdfFilesArrayAdapter = new ArrayAdapter(this, R.layout.pdf_files, pdfFiles,"PDF"); ArrayAdapter otherFilesArrayAdapter = new ArrayAdapter(this, R.layout.other_files, otherFiles,"Other"); ArrayAdapter directoriesArrayAdapter = new ArrayAdapter(this, R.layout.directories, directories,"DIR");