How To Use A Custom Dialog In All Of My Application In Android

I have a dialog and i have many activities... I need to call the same dailog in all the activities...currently i have written the code in each of the activity but this is not the r

Solution 1:

Simply create a class and within that create a static method(say displayDialog), and within this, copy paste the code that displays your dialog. Now call this static method from anywhere in your project. But you might have to pass the context of the calling activity to the static method.

publicclassdialogClass {

staticDialog dialog=null;
publicstaticvoidexitApp_Dialog(Context context,String title,String message){

     AlertDialog.Builder alertbox = newAlertDialog.Builder(context);
      alertbox.setTitle("Warning");
     alertbox.setMessage("Exit Application?");
     alertbox.setPositiveButton("Yes", newDialogInterface.OnClickListener() {
         publicvoidonClick(DialogInterface arg0, int arg1) {
             activity.finish();
         }
     });
     alertbox.setNegativeButton("No", newDialogInterface.OnClickListener() {
         publicvoidonClick(DialogInterface arg0, int arg1) {

         } 
     });
     alertbox.show();
}
}

Solution 2:

Ok below is my way of implementing dialog its in a static class so I can call it from any activity when I need

publicstaticvoidshowProgressDialog(Context mContext, String text, boolean cancellable)
{
    removeDialog();
    mDialog = newDialog(mContext, android.R.style.Theme_Translucent_NoTitleBar_Fullscreen);
    mDialog.requestWindowFeature(Window.FEATURE_NO_TITLE);

    LayoutInflatermInflater= LayoutInflater.from(mContext);
    Viewlayout= mInflater.inflate(R.layout.popup_example, null);
    mDialog.setContentView(layout);

    TextViewmTextView= (TextView) layout.findViewById(R.id.text);
    if (text.equals(""))
        mTextView.setVisibility(View.GONE);
    else
        mTextView.setText(text);

    mDialog.setOnKeyListener(newDialogInterface.OnKeyListener()
    {
        publicbooleanonKey(DialogInterface dialog, int keyCode, KeyEvent event)
        {
            switch (keyCode)
            {
            case KeyEvent.KEYCODE_BACK:
                returntrue;
            case KeyEvent.KEYCODE_SEARCH:
                returntrue;
            }
            returnfalse;

        }
    });

    mDialog.setCancelable(cancellable);

    mDialog.show();
}

publicstaticvoidremoveDialog()
{
    if (mDialog != null)
        mDialog.dismiss();
}

Solution 3:

You should regroup the code that builds the Dialog in a helper class. Below is an excerpt of a DialogHelper I have built for myself and that I use to show my applications' help files.

publicclassDialogHelper {

publicstatic AlertDialog showHelp(final Context ctx, finalint resTitle, finalint resFilename, finalint resOk, finalint resViewOnline, finalint resOnlineUrl) {
        finalWebViewwebview=newWebView(ctx);
        webview.loadUrl(ctx.getString(resFilename));

        AlertDialog.Builderbuilder=newAlertDialog.Builder(ctx);
        builder.setTitle(resTitle)
                .setView(webview)
                .setCancelable(false)
                .setPositiveButton(resOk, newDialogInterface.OnClickListener() {
                    publicvoidonClick(DialogInterface dialog, int id) {
                        dialog.dismiss();
                    }
                })
                .setNegativeButton(resViewOnline, newDialogInterface.OnClickListener()         {
                    publicvoidonClick(DialogInterface dialog, int id) {
                        finalUriuri= Uri.parse(ctx.getString(resOnlineUrl));
                        finalIntentintent=newIntent(Intent.ACTION_VIEW, uri);
                        ctx.startActivity(intent);
                    }
                }
            );

            finalAlertDialogdlg= builder.create();
            dlg.show();

            return dlg;
        }
    }

    ... other kinds of dialog take place here ...
}

This way I just call

DialogHelper.showHelp(context, R.string.helpTitle, R.string.localizedFilename, R.string.labelOk, R.string.labelViewOnlineHelp, R.string.onlineHelpUrl); 

from all my applications. That's a lot of parameters but this is workable.

There is a non-nice thing in that code: I use setNegativeButton() for something else than its intended purpose. This is something I should refactor, but this doesn't change anything in the approach.

About the parameters of showHelp(): they are final as they are used in the anonymous classes built within the method. This is a requirement of the compiler.