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copied!<p>I have noticed one thing in you code:</p> <pre><code>gridView.setLayoutParams(new GridView.LayoutParams(width,LayoutParams.FILL_PARENT, Gravity.CENTER_HORIZONTAL)); </code></pre> <p>Even if <code>GridView</code> is a <code>ViewGroup</code>, you can't access it's <code>LayoutParams</code>. Just think it trough, if this would be possible that means you could put a <code>GridView</code> inside another <code>GridView</code>.</p> <p>Fix this before going further because is messing with you.</p> <p>If you want your GridView to be inside a LinearLayout, for example, try this:</p> <pre><code>gridView.setLayoutParams(new LinearLayout.LayoutParams(width,LayoutParams.FILL_PARENT, Gravity.CENTER_HORIZONTAL)); </code></pre> <p>Here is the correct implementation of <a href="https://stackoverflow.com/a/13689856/1392423">this answer</a>:</p> <pre><code>public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); /*You have to implement what things from the gridView sould be "saved"*/ GridView gridView = new GridView(this) { @Override public Parcelable onSaveInstanceState() { // Create the Parceable object with the things you want to save Parceable stateOfGrid = ....etc return stateOfGrid; } @Override public void onRestoreInstanceState(Parcelable state) { // Restore your grid's parameters that you previously implemented in onSaveInstanceState super.onRestoreInstanceState(state); ... } }; } @Override protected void onRestoreInstanceState(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onRestoreInstanceState(savedInstanceState); if (savedInstanceState != null) { Parcelable state = savedInstanceState.getParcelable("state"); if (state != null) { gridView.onRestoreInstanceState(state); Log.d(this.getClass().getName(), "state restored!"); } } @Override protected void onSaveInstanceState(Bundle outState) { // Put your grid's Parceable into the bundle super.onSaveInstanceState(outState); Parcelable state = gridView.onSaveInstanceState(); outState.putParcelable("state", state); } } </code></pre>

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