Question

I am trying to get text field value from a pop up on clicking Save button. But it is throwing errors.

Code :-

final Button btn_ContactDetails = (Button)findViewById(R.id.btn_ContactDetails);
btn_ContactDetails.setOnClickListener(new Button.OnClickListener(){

    public void onClick(View arg0) {
        LayoutInflater inflater = (LayoutInflater)getBaseContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View layout = inflater.inflate(R.layout.contactdetails, null, true);

        final PopupWindow popUp = new PopupWindow(layout, LayoutParams.WRAP_CONTENT,  LayoutParams.WRAP_CONTENT, true);
        popUp.setBackgroundDrawable(new BitmapDrawable());
        popUp.setOutsideTouchable(true);
        popUp.setTouchInterceptor(new OnTouchListener() {

            public boolean onTouch(View v, MotionEvent event) {
                if(event.getAction() == MotionEvent.ACTION_OUTSIDE) {
                    popUp.dismiss();
                    return true;
                }
                return false;
            }
        });

        Button btnDismiss = (Button)layout.findViewById(R.id.dismiss);
            btnDismiss.setOnClickListener(new Button.OnClickListener() {

                public void onClick(View v) {
                    // TODO Auto-generated method stub
                    popUp.dismiss();
                }
            });

        //On click Save - Contact Details
        Button btn_Save_ContactDetails = (Button)layout.findViewById(R.id.btn_Save_ContactDetails);
        btn_Save_ContactDetails.setOnClickListener(new Button.OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub
                EditText mEdit, sEdit;
                mEdit = (EditText)findViewById(R.id.txt_HouseNameNumber);
                sEdit = (EditText)findViewById(R.id.txt_Address1);
                sEdit.setText(mEdit.getText().toString());//THIS LINE IS THROWING ERROR
                popUp.dismiss();
            }
        });
        popUp.showAtLocation(layout, Gravity.CENTER, 0, 0);
    }
});

Error :-

06-12 03:21:37.828: E/AndroidRuntime(518): FATAL EXCEPTION: main
06-12 03:21:37.828: E/AndroidRuntime(518): java.lang.NullPointerException
06-12 03:21:37.828: E/AndroidRuntime(518):  at sai.om.SaiActivity$3$3.onClick(SaiActivity.java:171)
06-12 03:21:37.828: E/AndroidRuntime(518):  at android.view.View.performClick(View.java:2408)
06-12 03:21:37.828: E/AndroidRuntime(518):  at android.view.View$PerformClick.run(View.java:8816)
06-12 03:21:37.828: E/AndroidRuntime(518):  at android.os.Handler.handleCallback(Handler.java:587)
06-12 03:21:37.828: E/AndroidRuntime(518):  at android.os.Handler.dispatchMessage(Handler.java:92)
06-12 03:21:37.828: E/AndroidRuntime(518):  at android.os.Looper.loop(Looper.java:123)
06-12 03:21:37.828: E/AndroidRuntime(518):  at android.app.ActivityThread.main(ActivityThread.java:4627)
06-12 03:21:37.828: E/AndroidRuntime(518):  at java.lang.reflect.Method.invokeNative(Native Method)
06-12 03:21:37.828: E/AndroidRuntime(518):  at java.lang.reflect.Method.invoke(Method.java:521)
06-12 03:21:37.828: E/AndroidRuntime(518):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
06-12 03:21:37.828: E/AndroidRuntime(518):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
06-12 03:21:37.828: E/AndroidRuntime(518):  at dalvik.system.NativeStart.main(Native Method)

Can anyone help me find what I am doing wrong here?
I have provided comments to the line throwing error.

Answer 1

sEdit.setText( mEdit.getText());//THIS LINE IS THROWING ERROR

The most likely reason is that either sEdit or mEdit is null (or both).

Double check your layout file to make sure you have EditTexts with ids of txt_HouseNameNumber and txt_Address1. In other words, make sure they’re spelt correctly and remember case-sensitivity.

EDIT: Perhaps you should be using layout.findViewById(...) as follows?…

mEdit = (EditText)layout.findViewById(R.id.txt_HouseNameNumber);
sEdit = (EditText)layout.findViewById(R.id.txt_Address1);