Question

i am trying to change the image in a imageview, but when i set the variable in oncreate it gives me a yellow line making it so i cannot change my image.

in this app i am checking the Internet connection. basically, if the Internet connection is available i want to show a certain image; if not i want to show a image for that.

heres my code:

  @Override
public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


    ImageView imagev = (ImageView) findViewById(R.id.imageView1);

    Button btnStatus = (Button) findViewById(R.id.btn_check);

    // creating connection detector class instance
    cd = new ConnectionDetector(getApplicationContext());

    /**
     * Check Internet status button click event
     * */
    btnStatus.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {

            // get Internet status
            isInternetPresent = cd.isConnectingToInternet();

            // check for Internet status
            if (isInternetPresent) {
                // Internet Connection is Present
                // make HTTP requests
                showAlertDialog(AndroidDetectInternetConnectionActivity.this, "Internet Connection",
                        "You have internet connection", true);
                imagev.setImageDrawable(getResources().getDrawable(R.drawable.withinternet));

            } else {
                // Internet connection is not present
                // Ask user to connect to Internet
                showAlertDialog(AndroidDetectInternetConnectionActivity.this, "No Internet Connection",
                        "You don't have internet connection.", false);
                imagev.setImageDrawable(getResources().getDrawable(R.drawable.nointernet));
            }
        }

    });

}

Answer 1

Declare the image view as a class variable i.e., imageV should be declared before onCreate(as a class variable) rather than inside it. It will solve your problem..