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这里是我的代码浏览设备中的所有文件夹。Android的ListView适配器问题
private File file;
private List<String> directoriesList;
private ListView listView ;
private ArrayAdapter<String> adapter;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.folder_browse_screen);
listView = (ListView) findViewById(R.id.foldersListView);
directoriesList = new ArrayList<String>();
file = new File("/mnt");
File list[] = file.listFiles();
if (list != null && list.length >= 1) {
for (int i = 0; i < list.length; i++) {
File f = list[i];
if (!f.isHidden() && f.canRead() && f.isDirectory()) {
directoriesList.add(f.getName());
}
}
adapter = new ArrayAdapter<String>(this, R.layout.list_row, R.id.folder_name, directoriesList);
listView.setAdapter(adapter);
}
OnItemClick:
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
try {
File temp_file = new File(file, directoriesList.get(position));
if (!temp_file.isHidden() && temp_file.canRead() && temp_file.isDirectory()) {
file = new File(file, directoriesList.get(position));
File list[] = file.listFiles();
directoriesList.clear();
if (list != null && list.length >= 1) {
for (int i = 0; i < list.length; i++) {
File f = list[i];
if (!f.isHidden() && f.canRead() && f.isDirectory()) {
directoriesList.add(f.getName());
}
}
adapter.notifyDataSetChanged();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
异常:java.lang.IllegalStateException:适配器的内容发生了变化,但ListView控件没有收到通知。确保适配器的内容不会从后台线程修改,而只能从UI线程修改。 [在ListView(2131034114,类android.widget.ListView)与适配器(类android.widget.ArrayAdapter)]
我在哪里使用线程?为什么这是强制关闭点击任何空文件夹?请帮帮我。
辉煌。你解决了我的问题。非常感谢。 – Santhosh
如果不是这个答案,就不会检查我的代码。希望我可以+1 100次! – Sufian