单击工具栏上的汉堡包图标不会打开导航抽屉

Clicking hamburger icon on Toolbar does not open Navigation Drawer

我有这个 导航抽屉,它工作得很好。 重构我的代码,我删除了活动中的所有 onOptionsItemSelecteds,并使所有活动继承自一个基础 activity,它扩展了 AppComplatActivityimplements 所有必要的方法。 在点击汉堡包图标后,即使我有 syncstate() 和所有东西,它也不再起作用。

为什么这不起作用的任何线索?

One of the activities:

public class MainActivity extends BaseActivity implements SearchFilterFragment.OnFragmentInteractionListener {

NavigationView navigationView;
DrawerLayout drawerLayout;

private Tracker mTracker;

@Override
protected void onResume() {
    super.onResume();
    drawerLayout.openDrawer(GravityCompat.START);
}

@Override
protected void onPostResume() {
    super.onPostResume();
    mTracker.setScreenName("MainActivity" + "-----");
    mTracker.send(new HitBuilders.ScreenViewBuilder().build());
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    getWindow().getDecorView().setLayoutDirection(View.LAYOUT_DIRECTION_RTL);
    drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
    drawerLayout.openDrawer(GravityCompat.START);
    navigationView = (NavigationView) findViewById(R.id.navigation_view_primary);
    navigationView.setNavigationItemSelectedListener(new NavigationDrawerListener(this));
    setupToolbar();
    Haftdong application = (Haftdong) getApplication();
    mTracker = application.getDefaultTracker();
}

private void setupToolbar() {
    // Show menu icon
    final ActionBar actionBar = getSupportActionBar();
    actionBar.setDisplayHomeAsUpEnabled(true);// will make the icon clickable and add the < at the left of the icon.
    DrawerLayout mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
    ActionBarDrawerToggle mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
    mDrawerLayout.setDrawerListener(mDrawerToggle);
    mDrawerToggle.syncState();//for hamburger icon
}

@Override
public void onFragmentInteraction(Uri uri) {
}

}

基础活动:

public class BaseActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_base, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

}

您正在为 ActionBarDrawerToggle 使用四参数构造函数,这意味着您必须在 MainActivityonOptionsItemSelected() 中调用开关的 onOptionsItemSelected() 方法覆盖以便 open/close 抽屉。

例如:

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    if(mDrawerToggle.onOptionsItemSelected(item)) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}

如果您碰巧提供了自己的 Toolbar – 例如,作为支持 ActionBar(尽管没有必要这样设置) – 那么您可以改为传递 Toolbar 作为 ActionBarDrawerToggle 构造函数调用中的第三个参数。例如:

Toolbar toolbar = findViewById(R.id.toolbar);
ActionBarDrawerToggle mDrawerToggle = new ActionBarDrawerToggle(this, drawerLayout,
        toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);

然后抽屉 opening/closing 将由 ActionBarDrawerToggle 内部处理,您无需调用 onOptionsItemSelected() 中的开关。

此设置也不需要 setDisplayHomeAsUpEnabled() 调用,如果您不想将 Toolbar 设置为 ActionBar,这很方便。