Android, Logcat gives error about SearchView class

Question

i have installed the support library to get the action bar worked also in android pre API 11

When i start the application, the logcat give this error:

08-20 19:54:41.600: I/dalvikvm(9828): Failed resolving Landroid/support/v7/widget/SearchView$5; interface 809 'Landroid/view/View$OnLayoutChangeListener;'

08-20 19:54:41.600: W/dalvikvm(9828): Link of class 'Landroid/support/v7/widget/SearchView$5;' failed

08-20 19:54:41.600: E/dalvikvm(9828): Could not find class 'android.support.v7.widget.SearchView$5', referenced from method android.support.v7.widget.SearchView.addOnLayoutChangeListenerToDropDownAnchorSDK11

08-20 19:54:41.600: W/dalvikvm(9828): VFY: unable to resolve new-instance 734 (Landroid/support/v7/widget/SearchView$5;) in Landroid/support/v7/widget/SearchView;

08-20 19:54:41.600: D/dalvikvm(9828): VFY: replacing opcode 0x22 at 0x0002

08-20 19:54:41.600: D/dalvikvm(9828): VFY: dead code 0x0004-000a in Landroid/support/v7/widget/SearchView;.addOnLayoutChangeListenerToDropDownAnchorSDK11 ()V

Can someone help me, i search around the web but i found nothing. Thank you

MainActivity.Java

    package com.example.fanculo;

    import android.os.Bundle;
    import android.app.SearchManager;
    import android.content.Context;
    import android.support.v4.view.MenuItemCompat;
    import android.support.v7.widget.SearchView;
    import android.support.v7.app.ActionBar;
    import android.support.v7.app.ActionBarActivity;
    import android.view.Menu;
    import android.view.MenuItem;


    public class MainActivity extends ActionBarActivity{

ActionBar actionBar;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    actionBar = getSupportActionBar();
    actionBar.setTitle("Test");

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main, menu);
    MenuItem searchItem = menu.findItem(R.id.action_search);
    SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);

     SearchView searchView = (SearchView) MenuItemCompat.getActionView(searchItem);
    // Configure the search info and add any event listeners
     searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
     searchView.setIconifiedByDefault(true); 
    return super.onCreateOptionsMenu(menu);

}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case R.id.action_search:
            onSearchRequested();
            return true;
        default:
            return false;
    }
}

}

Answer 1

I think this is a bug in SearchView.java class in support library, you can see that it is using View.OnLayoutChangeListener in a common implementation file:

https://android.googlesource.com/platform/frameworks/support.git/+/android-4.3_r1/v7/appcompat/src/android/support/v7/widget/SearchView.java

this makes class loader to try loading View.OnLayoutChangeListener which is available since api level 11 - even if this *SDK11 method is not even called. I suppose this method addOnLayoutChangeListenerToDropDownAnchorSDK11 should be moved to external java class and used only if device API is >= 11.

You can reproduce this bug copying this code to your own activity:

private void addOnLayoutChangeListenerToDropDownAnchorSDK11() {
    new View.OnLayoutChangeListener() {
        @Override
        public void onLayoutChange(View v, int left, int top, int right, int bottom,
                                   int oldLeft, int oldTop, int oldRight, int oldBottom) {
        }
    };
}

public void onCreate(...) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
            addOnLayoutChangeListenerToDropDownAnchorSDK11();
        }
}

below is what logcat prints:

08-31 22:50:33.030: INFO/dalvikvm(20753): Failed resolving Lcom/example/ActionBarTester/MyActivity$1; interface 813 'Landroid/view/View$OnLayoutChangeListener;'
08-31 22:50:33.030: WARN/dalvikvm(20753): Link of class 'Lcom/example/ActionBarTester/MyActivity$1;' failed
08-31 22:50:33.030: ERROR/dalvikvm(20753): Could not find class 'com.example.ActionBarTester.MyActivity$1', referenced from method com.example.ActionBarTester.MyActivity.addOnLayoutChangeListenerToDropDownAnchorSDK11
08-31 22:50:33.030: WARN/dalvikvm(20753): VFY: unable to resolve new-instance 903 (Lcom/example/ActionBarTester/MyActivity$1;) in Lcom/example/ActionBarTester/MyActivity;
08-31 22:50:33.030: DEBUG/dalvikvm(20753): VFY: replacing opcode 0x22 at 0x0000
08-31 22:50:33.030: DEBUG/dalvikvm(20753): VFY: dead code 0x0002-0005 in Lcom/example/ActionBarTester/MyActivity;.addOnLayoutChangeListenerToDropDownAnchorSDK11 ()V

I am not sure if this bug Is actually causing any problems, in my case SearchView works on API Level 10, also above tests allow my activity to work. Maybe I am missing something here.