android check box and radio group on custom dialog

Question

Hi I have written simple custom dialog . which has few check boxs and one submitt button .

whenever I tried to read the checkbox apllication throws Nullpointer exception .. can somebody helps to solve this , below is my custom dailog code

    public void onClick(View arg0) {

            // custom dialog
            final Dialog dialog = new Dialog(context);
            dialog.setContentView(R.layout.custom);
            dialog.setTitle("Title...");
             CheckBox chk1= (CheckBox) findViewById(R.id.chkbox1);
               Button dialogButton = (Button) dialog.findViewById(R.id.dialogButtonOK);
            // if button is clicked, close the custom dialog
            dialogButton.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                   if(chk1.isChecked())
                    dialog.dismiss();
                }
            });

            dialog.show();
}

score 1 · Answer 1 · answered Jun 25 '13 at 11:36

Change:

CheckBox chk1= (CheckBox) findViewById(R.id.chkbox1);

to:

CheckBox chk1= (CheckBox) dialog.findViewById(R.id.chkbox1);

Remember that if you're simply using findViewById(), you're calling it for Activity in which you currently are, but as far as I see, you want to find this CheckBox in R.layout.custom which is set for dialog.

I see that you're properly loading dialogButton, so you probably just forgot to do the same with chk1.

score 1 · Answer 2 · answered Jun 25 '13 at 11:36

1

When you have populated a layout for dialog then you need to access it through dialog. But you are accessing it through parent view. Anyway just call it through dialog.findViewById(R.id.chkbox1)

answered Jun 25 '13 at 11:36

Hasandroid

336
5
12

score 1 · Accepted Answer · answered Jun 25 '13 at 11:37

1

NullPointerException because you didn't instantiated with dialog.findViewById() and set OnClickListener for the CheckBox. Place it as below:

 CheckBox chk1= (CheckBox)dialog.findViewById(R.id.chkbox1);
 chk1.setOnClickListener(new OnClickListener() {

   //do something here
  });

answered Jun 25 '13 at 11:37

Avadhani Y

7,566
19
63
90

I am trying add radio group to the custom dialog .. It comes when dialog is loaded , but how to add the action lister to that radio group in the dialog .. below is my custom layout xml . – user2245568 Jun 25 '13 at 13:08
ok. No Problem. Add the Radiogroup as `RadioGroup radGroup = (Radiogroup)dialog.findViewById(R.layout.)`... – Avadhani Y Jun 25 '13 at 13:10

score 0 · Answer 4 · answered Jun 25 '13 at 13:16

I am trying add radio group to the custom dialog .. It comes when dialog is loaded , but how to add the action lister to that radio group in the dialog .. below is my custom layout xml .

    <?xml version="1.0" encoding="utf-8"?>
      <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" 
 android:theme="@android:style/Theme.Light">

  <EditText
    android:id="@+id/editText"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
      android:layout_marginTop="4dp"

     />


 <CheckBox
    android:id="@+id/chksmart"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="SMARTAPPLIANCE    " 

     android:layout_below="@+id/editText"
    />

<CheckBox
    android:id="@+id/meter"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Device"
     android:layout_below="@+id/chksmart"
     />
 <RadioGroup
    android:id="@+id/radiogroup"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/android:list" 
    android:textColor="@android:color/black"  >

    <RadioButton
        android:id="@+id/radioGet"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:onClick="radioClickHandler1"
        android:text="GET"
        android:textColor="@android:color/background_dark"  />

    <RadioButton
        android:id="@+id/radioPut"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:onClick="radioClickHandler1"
        android:text="PUT"
        android:textColor="@android:color/background_dark"  />

    <RadioButton
        android:id="@+id/radioPost"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:onClick="radioClickHandler1"
        android:text="POST"
        android:textColor="@android:color/background_dark"  />

    <RadioButton
        android:id="@+id/radioDelete"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:onClick="radioClickHandler1"
        android:text="DELETE"
        android:textColor="@android:color/background_dark"  />
      <RadioButton
        android:id="@+id/radioevent"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:onClick="radioClickHandler1"
        android:text="ADDEVENT"
        android:textColor="@android:color/background_dark"  />
</RadioGroup>

 <Button
    android:id="@+id/dialogButtonOK"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text=" SUBMIT "
    android:textColor="#00000f"
    android:textSize="25px"
    android:textStyle="bold"
    android:layout_marginTop="5dp"
    android:layout_marginRight="5dp"
    android:layout_below="@+id/radiogroup"
    />

android check box and radio group on custom dialog

4 Answers4

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