Android - Custom Dialog - Can't get text from

问题:

I have a problem with a custom dialog.
My dialog consists of a TextView, EditText and an "Ok" Button. After clicking "Ok", it should get the text from EditText field and assign it to the String variable "name" defined in the Activity.
Everything seems to work, no errors etc, however "text" is always an empty String.
I read some topics about such problems, however I'm not really sure what adjustments I should make here.
I'm quite new to Android programming, so I'd be grateful if somebody could explain the problem to me. Thanks in advance.

     final Dialog dialog = new Dialog(MyActivity.this);
     dialog.setContentView(R.layout.custom_dialog);
     dialog.setTitle("Title");

     final View layout = View.inflate(this, R.layout.custom_dialog, null);
     Button button = (Button) dialog.findViewById(R.id.dialog_ok);
     button.setOnClickListener(new OnClickListener() {
         public void onClick(View v) {
                EditText edit=(EditText)layout.findViewById(R.id.dialog_edit);
                String text=edit.getText().toString();

                name=text;

                dialog.dismiss();
         }
     });   

     dialog.show();

回答1:

You are inflating a layout where it is not needed. I fixed your code as you see I removed your line where it inflates and changed the line where you try to find the EditText view.

final Dialog dialog = new Dialog(MyActivity.this);
 dialog.setContentView(R.layout.custom_dialog);
 dialog.setTitle("Title");

 Button button = (Button) dialog.findViewById(R.id.dialog_ok);
 button.setOnClickListener(new OnClickListener() {
     public void onClick(View v) {

            EditText edit=(EditText)dialog.findViewById(R.id.dialog_edit);
            String text=edit.getText().toString();

            dialog.dismiss();
            name=text;

     }
 });   


dialog.show();

回答2:

If you want to inflate a xml file into dialog box for creating custom version you can use the following code which gets two input from user

LayoutInflater linf = LayoutInflater.from(this);            
final View inflator = linf.inflate(R.layout.twoinputs, null);
AlertDialog.Builder alert = new AlertDialog.Builder(this); 

alert.setTitle("Tilte"); 
alert.setMessage("Message"); 
alert.setView(inflator); 

final EditText et1 = (EditText) inflator.findViewById(R.id.editText1);
final EditText et2 = (EditText) inflator.findViewById(R.id.editText2);

alert.setPositiveButton("ok", new DialogInterface.OnClickListener() { 
   public void onClick(DialogInterface dialog, int whichButton) 
   { 
          String s1=et1.getText().toString();
          String s2=et2.getText().toString();
          //do operations using s1 and s2 here...
   } 
}); 

alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() { 
   public void onClick(DialogInterface dialog, int whichButton) { 
            dialog.cancel(); 
   } 
}); 

alert.show(); 

回答3:

An alternative to matsjoe and to krishna (both work):

builder.setPositiveButton(R.string.signin, new DialogInterface.OnClickListener() {
    //@Override
    public void onClick(DialogInterface dialog, int id) {
      // sign in the user ...

      Dialog dialogObj =Dialog.class.cast(dialog);
      EditText etUsr=(EditText) dialogObj.findViewById(R.id.username_id_value);
      userStr = etUsr.getText().toString();      
    }
  }
  );

Kf

回答4:

Hope it will help you.

private void inputFromDialog() {

    final Dialog dialog = new Dialog(SplashActivity.this);
    dialog.setContentView(R.layout.view_dialog);
    dialog.setTitle("Title");
    dialog.setCancelable(false);
    dialog.show();

    Button button = (Button) dialog.findViewById(R.id.continue_BTN);
    button.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {

            EditText inputET=(EditText)dialog.findViewById(R.id.input_ET);


            if (inputET.getText().toString().equals("")){

                inputET.setError("This field is required");

            }else {

                mssid = inputET.getText().toString();
                dialog.cancel();
                Toast.makeText(SplashActivity.this, mssid, Toast.LENGTH_SHORT).show();
            }

        }
    });



}

回答5:

EditText editText = (EditText) findViewById(R.id.edit_message);
String message = editText.getText().toString();

http://developer.android.com/training/basics/firstapp/starting-activity.html