How to programatically hide Imageview
<p>i have a linearlayout with three icons as below</p>

<pre><code> &lt;ImageView
            android:id="@+id/cities"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content          
            android:src="@drawable/city" /&gt;

        &lt;ImageView
            android:id="@+id/red"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"           
            android:src="@drawable/red"
            android:visibility="gone" 
            /&gt;
        &lt;ImageView
            android:id="@+id/deal"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"       
            android:src="@drawable/deal" /&gt;
</code></pre>

<p>initially the middle icon is hidden (android:visibility="gone" ) i have a login screen..when the login i success i want the icon to be visible ..tried as below..but itz not working</p>

<pre><code>public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);

            setContentView(R.layout.fyelogin);                    
            etPassword = (EditText)findViewById(R.id.password);
            btnLogin = (Button)findViewById(R.id.login_button);
            btnCancel = (Button)findViewById(R.id.cancel_button);
            lblResult = (TextView)findViewById(R.id.result);

            final ImageView details = (ImageView)findViewById(R.id.red); 

            btnLogin.setOnClickListener(new OnClickListener() {
                public void onClick(View v) {

                    String password = etPassword.getText().toString();

                    if(password.equals("guest")){
                        lblResult.setText("password successful.");

 giving error @ this line  -----&gt;  details.setVisibility(View.VISIBLE);

                    } else {
                        lblResult.setText("password doesn't match.");

                    }

                    finish();} });
</code></pre>

<p>Struck here Any help is appreciated.</p>
