然而,当按钮放置在层次结构中以便可以在导航抽屉的顶部看到时,按钮可以正常工作。但是,当滑动按钮时,按钮应隐藏在导航抽屉后面,因此这是不可取的。
以下是 MainActivity.java
中的代码public class MainActivity extends ActionBarActivity implements NavigationDrawerCallbacks {
public ProgressDialog progBar;
public final static boolean DEBUG = false;
public final static String TAG = "AppGetter";
private Toolbar mToolbar;
private NavigationDrawerFragment mNavigationDrawerFragment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mToolbar = (Toolbar) findViewById(R.id.toolbar_actionbar);
setSupportActionBar(mToolbar);
getSupportActionBar().setDisplayShowHomeEnabled(true);
getSupportActionBar().setDisplayShowTitleEnabled(false);
mNavigationDrawerFragment = (NavigationDrawerFragment) getFragmentManager().findFragmentById(R.id.fragment_drawer);
mNavigationDrawerFragment.setup(R.id.fragment_drawer, (DrawerLayout) findViewById(R.id.drawer), mToolbar);
ImageButton cart_button = (ImageButton) findViewById(R.id.button2);
cart_button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
start_request();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public void onNavigationDrawerItemSelected(int position) {
Toast.makeText(this, "Menu item selected -> " + position, Toast.LENGTH_SHORT).show();
}
@Override
public void onBackPressed() {
if (mNavigationDrawerFragment.isDrawerOpen())
mNavigationDrawerFragment.closeDrawer();
else
super.onBackPressed();
}
public void start_request()
{
String pkg = getPackageName();
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.setComponent(new ComponentName(pkg,pkg+".RequestActivity"));
startActivity(intent);
if(DEBUG)Log.v(TAG,"Intent intent: "+intent);
}
}
我假设问题出在上面的类中,但为了完成,我粘贴了下面感兴趣的两个XML文件。
activity_main.xml 如您所见,ImageButton当前位于层次结构中导航抽屉的“上方”,以使其被导航抽屉覆盖。将ImageButton移动到“下方”会使按钮正常工作,但会使其显示在导航抽屉的顶部(而不是像布局的其余部分那样着色)。
<FrameLayout
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">
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:fontify="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity"
android:background="@color/myPrimaryColor">
<View
android:id="@+id/block1"
android:layout_height="240dp"
android:layout_width="match_parent"
android:layout_below="@+id/toolbar_actionbar"
android:background="@drawable/block_primary"
/>
<TextView
android:id="@+id/title1"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_below="@+id/toolbar_actionbar"
android:layout_centerHorizontal="true"
android:layout_marginTop="56dp"
android:text="@string/title"
android:textColor="@color/white"
android:textSize="34sp"
android:fontFamily="sans-serif"
/>
<include
android:id="@+id/toolbar_actionbar"
layout="@layout/toolbar_default"
android:layout_height="wrap_content"
android:layout_width="match_parent"
/>
<ImageButton
android:id="@+id/button2"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="268dp"
android:src="@drawable/ic_chevron_up"
android:background="@drawable/fab_simple"/>
<android.support.v4.widget.DrawerLayout
android:id="@+id/drawer"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:layout_below="@+id/toolbar_actionbar"
>
<FrameLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<fragment
android:id="@+id/fragment_drawer"
android:name="com.onepersonco.iconrequestbase.NavigationDrawerFragment"
android:layout_width="@dimen/navigation_drawer_width"
android:layout_height="match_parent"
android:layout_gravity="start"
layout="@layout/fragment_navigation_drawer"
tools:layout="@layout/fragment_navigation_drawer" />
</android.support.v4.widget.DrawerLayout>
</RelativeLayout>
fragment_navigation_drawer.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<!-- Provides a margin at the top of the navigation drawer. -->
<View
android:id="@+id/navWhiteSpace1"
android:layout_width="match_parent"
android:layout_height="64dp"
android:background="@color/myNavigationDrawerBackgroundColor"
/>
<android.support.v7.widget.RecyclerView
android:id="@+id/drawerList"
android:layout_below="@+id/navWhiteSpace1"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:focusableInTouchMode="true"
android:scrollbars="vertical"
android:scrollbarDefaultDelayBeforeFade="0"
android:scrollbarFadeDuration="0"
android:overScrollMode="never"
android:focusable="true"
android:background="@color/myNavigationDrawerBackgroundColor"/>
</RelativeLayout>
答案 0 :(得分:2)
我尝试在线关注各种导航抽屉教程时遇到了同样的问题。
对我有用的是在GitHub上使用Mike Penz的MaterialDrawer库。他在页面底部的“自述文件”中有一个非常简单的教程。
希望对Java有更好了解的其他人可以解释为什么代码失败。