How can I open the file in arrayadapter list after clicking?

Question

I'm listing PDF files in folder. But I want them to be named as filename, instead of sdcard/mypath/files Also, I want to open them whenever I click them via PDF viewer. My code:

public class activity1 extends ListActivity {

private List<String> fileList = new ArrayList<String>();

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    File root = new File("sdcard/mypath");
    ListDir(root);
}

void ListDir(File f) {
    File[] files = f.listFiles();
    fileList.clear();
    for (File file : files) {
        fileList.add(file.getPath());
    }
    ArrayAdapter<String> directoryList = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, fileList);
    setListAdapter(directoryList);
}}

Thanks Donald! No. I haven't thinking of using setOnItemClickListener. Where should I use it? Also, what about the names? — Amey Bansod, Dec 05 '16 at 09:14
you can try to ``setOnItemClickListener`` to your ``directoryList `` — Donald Wu, Dec 05 '16 at 09:15
http://stackoverflow.com/questions/8615417/how-can-i-set-onclicklistener-on-arrayadapter — Donald Wu, Dec 05 '16 at 09:15
try this http://stackoverflow.com/questions/8126175/android-how-to-add-an-item-click-method-to-an-arrayadapter — Donald Wu, Dec 05 '16 at 09:22
Not list view using array adapter. Edited question. Will try that Donald Wu. — Amey Bansod, Dec 05 '16 at 09:26
I'm not able to perform operations on file.It says we need to declare it as final. But after declaring it as final, its remaining static. Whats the solution? — Amey Bansod, Dec 05 '16 at 09:36

Mr.Popular · Accepted Answer · 2016-12-05T10:53:12.313

   public class activity1 extends ListActivity {
   ListView lv;
   private List<String> fileList = new ArrayList<String>();

  @Override
    public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    File root = new File("sdcard/mypath");
      lv = getListView();
        ListDir(root);
       }

     void ListDir(File f) {
      File[] files = f.listFiles();
   fileList.clear();
for (File file : files) {
    fileList.add(file.getName());
}
ArrayAdapter<String> directoryList = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, fileList);
setListAdapter(directoryList);
    lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
            viewPdf(fileList.get(i));
        }
    });
}

 }}

and open the file in pdf default pdf viewer

     private void viewPdf(String file) {

        File pdfFile = new File(Environment.getExternalStorageDirectory() +    "/" + "mypath"+ "/" + file);
        Uri path = Uri.fromFile(pdfFile);

       // Setting the intent for pdf reader
    Intent pdfIntent = new Intent(Intent.ACTION_VIEW);
    pdfIntent.setDataAndType(path, "application/pdf");
    pdfIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);


        startActivity(pdfIntent);
   }

Use the above code.. Hope it helps!

thank you! But how can I open those files? And How can I name them appropriately instead of their file paths. — Amey Bansod, Dec 05 '16 at 10:09
while sending names to adapter just sent the file names alone instead of the file paths by — Mr.Popular, Dec 05 '16 at 10:34
now see the updated answer by this u can open the pdf files... Hope it helps! — Mr.Popular, Dec 05 '16 at 10:53

score 0 · Answer 2 · answered Dec 05 '16 at 11:01

Below code will help to open the file with as these type. check this answer:

 public static Intent getOpenFileIntent(Context ctx, String path) {

    Intent intent = new Intent(Intent.ACTION_VIEW);
    try {
        File file = new File(path);
        Uri uri = Uri.fromFile(file);
        String extension = MimeTypeMap.getFileExtensionFromUrl(path);
        if (extension != null) {
            String type = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);
            boolean status = canDisplay(ctx, type);
            if (type == null || !status) {
                type = "*/*";
            }
            if (!status) {
                Toast.makeText(ctx, "Cannot find appropriate Application", Toast.LENGTH_LONG).show();
            }
            intent.setDataAndType(uri, type);
        }
    } catch (Exception e) {
        AppLog.exception(e);
    }
    return intent;
}

and below code will check that the particular actionview app is present or not

   static boolean canDisplay(Context context, String mimeType) {
    try {
        PackageManager packageManager = context.getPackageManager();
        Intent testIntent = new Intent(Intent.ACTION_VIEW);
        testIntent.setType(mimeType);
        return packageManager.queryIntentActivities(testIntent, PackageManager.MATCH_DEFAULT_ONLY).size() > 0;
    } catch (Exception e) {
        AppLog.exception(e);
    }
    return false;
}

if the file type can openable, it will show the file with appropriate application or list the application can open the file.

UPDATE

Before send the file to this function make sure , that the particular file is present and readable.

How can I open the file in arrayadapter list after clicking?

2 Answers2