Android 5 汉堡没有打开抽屉

Question

我正在尝试制作一个简单的导航抽屉，以符合 material 准则。我正在关注 the official training. Everything is running well, only a tap on the hamburger icon won't open the drawer. I can open the drawer with a swipe from the side, only the hamburger isn't working. I already looked up some other questions like this one，但没有任何帮助。我错过了什么？

这是我的代码：

Activity.java:

public class stream extends ActionBarActivity {
private DrawerLayout mDrawerLayout;
private ActionBarDrawerToggle mDrawerToggle;
private String[] mDrawerTitles;
private ListView mDrawerList;
private Toolbar mToolbar;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_stream);

    // Init the Support-toolbar
    mToolbar = (Toolbar) findViewById(R.id.toolbar);
    if (mToolbar != null) {
        setSupportActionBar(mToolbar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    }

    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
    mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, mToolbar,
            R.string.navigation_drawer_open, R.string.navigation_drawer_close);
    mDrawerLayout.setDrawerListener(mDrawerToggle);

    // enable ActionBar app icon to behave as action to toggle nav drawer
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    getSupportActionBar().setHomeButtonEnabled(true);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = new MenuInflater(this);
    inflater.inflate(R.menu.menu_main, menu);
    return true;
}

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

@Override
protected void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);
    mDrawerToggle.syncState();
}

@Override
public void onBackPressed() {
    if(mDrawerLayout.isDrawerOpen(Gravity.START|Gravity.LEFT)){
        mDrawerLayout.closeDrawers();
        return;
    }
    super.onBackPressed();
}

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    // Pass any configuration change to the drawer toggle
    mDrawerToggle.onConfigurationChanged(newConfig);
    }
}

Layout.xml

 <RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="de.square7.gtz.lwenzahn.stream"
 android:background="@color/ColorBackground">

<!-- Toolbar -->
<include layout="@layout/toolbar"/>

<android.support.v4.widget.DrawerLayout
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <!-- Content View -->
    <FrameLayout
        android:id="@+id/content_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:paddingTop="56dp"/>

    <!-- Drawer -->
    <ListView
        android:id="@+id/left_drawer"
        android:layout_width="270dp"
        android:layout_height="match_parent"
        android:focusableInTouchMode="false"
        android:choiceMode="singleChoice"
        android:background="#ffffffff"
        android:layout_gravity="start"
        android:elevation="8dp" >
    </ListView>
</android.support.v4.widget.DrawerLayout>

Answer 1

您没有将 DrawerLayout 用作 activity 的根布局。你几乎就在那里，但你看到你如何使用 RelativeLayout 作为根（或者至少这是我从发布的 xml 推断的 - RelativeLayout 看起来不像它有一个结束标签所以也许你只是错过了它)?

仅当 "hamburger"（或图标）是根节点时，NavigationDrawer 才会在点击时打开，以便 Android 知道 DrawerLayout 包含所有内容。我的猜测是您包含的工具栏干扰了布局。

Android 5 汉堡没有打开抽屉

Android 5 Hamburger doen't open the drawer

android

navigation-drawer

android-5.0-lollipop