android custom dialog on tab activity

Question

I have a tab activity caled "tabActivity", inside the tab activity i want a button "butDetail" at "saveImageActivity" to show a custom dialog "detail.xml". this is my code to show the dialog

public void butDetail(View v){
    final Dialog dialog = new Dialog(saveImageActivity.this);
    dialog.setContentView(R.layout.detail);
    dialog.setTitle("Detail Image");
    TextView filepath = (TextView)findViewById(R.id.txtfilepath);
    TextView resolution = (TextView)findViewById(R.id.txtresolution);
    filepath.setText("File Path : ");
    resolution.setText("Resolution : ");
    dialog.setCancelable(true);
    dialog.show();
}

why if i add the "filepath" and "resolution" its always give "java.lang.NullPointerException", and if i detele that two variabel the dialog is show up,,, any solution for this case??

score 2 · Answer 1 · edited Oct 09 '12 at 09:50

2

Use following code:

TextView filepath = (TextView)dialog.findViewById(R.id.txtfilepath);
TextView resolution = (TextView)dialog.findViewById(R.id.txtresolution);

edited Oct 09 '12 at 09:50

Sumit Singh

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answered Oct 09 '12 at 09:47

Mohsin Naeem

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1

absolutely correct. You should "find the view by id" but in the right environment! – Sebastian Breit Oct 09 '12 at 09:53

score 1 · Answer 2 · answered Oct 09 '12 at 09:56

use this code

  private void showDiaalog() {
            final Dialog dialog = new Dialog(Context);
            dialog.requestWindowFeature(dialog.getWindow().FEATURE_NO_TITLE);
            dialog.setContentView(R.layout.layoutfile);

            dialog.setCancelable(true);
            btnok = (Button) dialog.findViewById(R.id.btnOk);

            btnok.setOnClickListener(new OnClickListener() {

                public void onClick(View arg0) {

                        //some thing else
                    }


                }
            });
            Button btnCancel = (Button) dialog.findViewById(R.id.btncancel);

            btnCancel.setOnClickListener(new OnClickListener() {

                public void onClick(View arg0) {

                    dialog.dismiss();
                }
            });

            dialog.show();
        }

android custom dialog on tab activity

2 Answers2