在对话框布局中,我根据用户选择以编程方式创建第二个EditText。当我想要返回输入时,我需要知道是否创建了第二个EditText。我不明白如何进行此项检查。我的语句if(edittextTwo!= null)始终为空,即使已经显示第二个EditText并将其输入到文本中。如何找出EditText是否已创建?
下面是其创建第二个EditText上,并返回其输入的方法:
如果(!edittextTwo = NULL)
private void displayASecondEdittext(String title) {
ViewGroup layout = (ViewGroup) findViewById(R.id.layout_editdialog);
TextView titleTwo = new TextView(this);
titleTwo.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
titleTwo.setText(title);
layout.addView(titleTwo);
EditText edittextTwo = new EditText(this);
edittextTwo.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
layout.addView(edittextTwo);
}//END displayASecondInputfield
private void returnResult() {
Intent resultIntent = new Intent(this, EditDialog.class);
resultIntent.putExtra(EDITONE, edittextOne.getText().toString());
if (edittextTwo != null) {
resultIntent.putExtra(EDITTWO, edittextTwo.getText().toString());
Log.v(TAG, "edittextTwo ="+edittextTwo.getText().toString());
}
setResult(Activity.RESULT_OK, resultIntent);
finish();
}//END returnResult
啊,是的。对于初学者来说,范围很棘手。谢谢! – Tombola 2012-02-18 18:57:09