单击工具栏上的汉堡图标不会打开导航抽屉

Question

我有这个导航抽屉，工作得非常好。重构我的代码我删除了活动中的所有onOptionsItemSelecteds，并使所有活动都继承自扩展AppComplatActivity并实现所有必要方法的基本活动。在此之后，即使我有syncstate（）和所有东西，点击汉堡包图标也不再起作用。

任何线索为什么这不起作用？

其中一项活动：

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) {
}

}

BaseActivity：

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);
}

}

Answer 1

你正在使用ActionBarDrawerToggle的四参数构造函数，这意味着你必须在onOptionsItemSelected()的MainActivity覆盖中调用toggle的onOptionsItemSelected()方法才能打开/关闭抽屉。

例如：

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

    return super.onOptionsItemSelected(item);
}

---

如果您碰巧提供自己的Toolbar - 例如，作为支持ActionBar（虽然没有必要设置它） - 然后您可以将Toolbar作为ActionBarDrawerToggle构造函数调用中的第三个参数传递。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);

抽屉打开/关闭将由ActionBarDrawerToggle内部处理，您无需打电话到onOptionsItemSelected()的切换。

setDisplayHomeAsUpEnabled()调用对于此设置也是不必要的，如果您不想将Toolbar设置为ActionBar，这将非常方便。