Android - DialogFragment not Showing

Question

我想按下按鈕後顯示一個對話框，但下面的代碼不執行並顯示FragmentDialog。提前致謝。

//BackPress 
     public void onBackPressed() { 

      TestDialogFragment test= new TestDialogFragment(); 
      test.newInstace(); 
      // Showing Alert Message 

      Log.d("Video Backpressed", "sdfdf"); 
     } 

TestDialogFragment

public static class TestDialogFragment extends DialogFragment { 

    public static DialogFragment newInstace() { 
     DialogFragment dialogFragment = new TestDialogFragment(); 
     return dialogFragment; 
    } 

    @Override 
    public Dialog onCreateDialog(Bundle savedInstanceState) { 
     AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); 
     builder.setTitle("TestDialogFragment"); 
     builder.setView(getContentView()); 
     Dialog dialog = builder.create(); 
     return dialog; 
    } 

    private View getContentView() { 
     LayoutInflater inflater = getActivity().getLayoutInflater(); 
     return inflater.inflate(R.layout.dialog_fragment, null); 
    } 
    } 

Answer 1

你沒有調用DialogFragmentshow()方法。在您的代碼中，您只創建了一個DialogFragment的實例。

public void onBackPressed() { 

    TestDialogFragment test= new TestDialogFragment(); 
    test.show(getFragmentManager(), "my_dialog"); 

}