Question

我有一个包含搜索视图的操作栏。当我想通过单击搜索按钮从列表视图中搜索某些内容时，操作栏会在左侧显示一个后退按钮。如果我在获取搜索列表后单击此后退按钮，搜索视图和后退按钮消失但列表视图仅显示搜索列表而非原始列表。

public class ActivityThree extends AppCompatActivity{
FloatingActionButton fab;
DBHelper myDb;
ArrayList<AccountDetails> rList;
ListView listView;
RemainderAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_three);

    fab = (FloatingActionButton) findViewById(R.id.fab);
    listView = (ListView) findViewById(R.id.listView);
    myDb = new DBHelper(this);

    showViews();
    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            startActivity(new Intent(ActivityThree.this, ActivityFour.class));
        }
    });
}



private void showViews() {
    rList = new ArrayList<AccountDetails>();
    rList = myDb.getAllRows();
    if (rList.size() != 0) {
        adapter = new RemainderAdapter(this, rList);
        listView.setAdapter(adapter);
        listView.setTextFilterEnabled(true);
    } else {
        Toast.makeText(this,"There is no item in the list",Toast.LENGTH_SHORT).show();
    }

}
@Override
public boolean onCreateOptionsMenu(Menu menu){
    getMenuInflater().inflate(R.menu.menu_item,menu);
    SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
    final SearchView searchView = (SearchView) menu.findItem(R.id.search).getActionView();
    searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
    searchView.setIconifiedByDefault(false);

SearchView.OnQueryTextListener textChangeListener = new SearchView.OnQueryTextListener()
{
    @Override
    public boolean onQueryTextChange(String newText)
    {
            adapter.getFilter().filter(newText);
        return true;
    }
    @Override
    public boolean onQueryTextSubmit(String query)
    {

        adapter.getFilter().filter(query);
        invalidateOptionsMenu();
        return true;
    }
};
searchView.setOnQueryTextListener(textChangeListener);
    return super.onCreateOptionsMenu(menu);

}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    int id = item.getItemId();
    if(id==R.id.changePwd){
        startActivity(new Intent(this, PwdChange.class));
        return true;
    }
    if(id==R.id.about){
        startActivity(new Intent(this, ActivityAbout.class));
        return true;
    }if(id==R.id.share){
        try
        { Intent i = new Intent(Intent.ACTION_SEND);
            i.setType("text/plain");
            i.putExtra(Intent.EXTRA_SUBJECT, "ABCD");
            String sAux = "\nLet me recommend you this application\n\n";
            i.putExtra(Intent.EXTRA_TEXT, sAux);
            startActivity(Intent.createChooser(i, "Choose any one"));
        }
        catch(Exception e)
        { 
        }
    }
    if(id==R.id.exit){
        android.os.Process.killProcess(android.os.Process.myPid());
        System.exit(0);
    }
    return super.onOptionsItemSelected(item);
}

}

Answer 1

这是在点击searchView's后退按钮时显示祝酒词的工作代码。

@Override
public boolean onCreateOptionsMenu(Menu menu){
    getMenuInflater().inflate(R.menu.menu_item,menu);
    SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
    final SearchView searchView = (SearchView) menu.findItem(R.id.search).getActionView();
    searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
    searchView.setIconifiedByDefault(false);

    MenuItem searchItem = menu.findItem(R.id.action_search);
    MenuItemCompat.setOnActionExpandListener(searchItem, new MenuItemCompat.OnActionExpandListener() {
        @Override
        public boolean onMenuItemActionExpand(MenuItem item) {
            return true;
        }

        @Override
        public boolean onMenuItemActionCollapse(MenuItem item) {
            Toast.makeText(MainActivity.this," Back Button Clicked",Toast.LENGTH_LONG).show();
            showViews();
            return true;
        }
    });

    SearchView.OnQueryTextListener textChangeListener = new SearchView.OnQueryTextListener()
    {
        @Override
        public boolean onQueryTextChange(String newText)
        {
            adapter.getFilter().filter(newText);
            return true;
        }
        @Override
        public boolean onQueryTextSubmit(String query)
        {

            adapter.getFilter().filter(query);
            invalidateOptionsMenu();
            return true;
        }
    };
    searchView.setOnQueryTextListener(textChangeListener);
    return super.onCreateOptionsMenu(menu);

}

ActionBar后退按钮不起作用

1 个答案: