Question

I have found plenty of ways to do that, none of them simple, though (and I wasn t able to implement the more complicated one, so I am looking for a simpler solution). I would like to fill my ArrayAdapter with the names of all png files in my direcory I use for saving some pngs from the app. This one is great:http://www.dreamincode.net/forums/topic/190013-creating-simple-file-chooser/ but not exactly easy. I believe there is a simpler way, I just couldn t find it (and I really did my homework and was looking for it quite some time). I assume something like File.listFiles() could work, I just don t know how.

我的代码:

    public void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    this.requestWindowFeature(Window.FEATURE_NO_TITLE);

    String[] values = new String[] ;

    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, values);
    setListAdapter(adapter);
    getListView().setBackgroundDrawable(getResources().getDrawable(R.drawable.diver));
}

@Override

protected void onListItemClick(ListView list, View v, int position, long id) {
    list.setBackgroundDrawable(getResources().getDrawable(R.drawable.diver));
    String item = (String) getListAdapter().getItem(position);

    setContentView(R.layout.table);
    myWebView = (WebView)findViewById(R.id.myWebView);
    myWebView.setInitialScale(50);
    myWebView.getSettings().setBuiltInZoomControls(true);
    myWebView.loadUrl(Environment.getExternalStorageDirectory()+ File.separator + "DivePlanner" + File.separator + item);


}

我要填入目录 / sdcard/ DivePlanner / 中所有 png 文件的名称。如果有人知道任何容易的方法, 非常感谢!

Answer 1

是, 您应该使用 File. listFiles () 方法从想要的文件夹中获取所有文件。当您有一系列文件时, 您应该简单地通过它进行循环, 从每个文件取回文件的名称。

如果您只想要.png 文件, 请检查 java FileFilter 类及其使用

你们的集会,你们看这里:

http://www.exampledepote.com/egs/java.io/GetFiles.html

Answer 2

你可以使用这样的东西:

final File directory = new File(path);
if(!directory.exists() || !directory.isDirectory()){
    //do something
}
final Collection<String> pngFilenames = new HashSet<String>();
for(final String filename : directory.list()){
    if(filename.endsWith(".png")){
        pngFilenames.add(filename);
    }
}
final String[] values = (String[])pngFilenames.toArray(new String[pngFilenames.size()]);

友情链接