我在标签布局上有4个标签。前3个工作完美，但第4个确实隐藏了动作栏。据推测，这是因为屏幕上的内容太多，并且试图将所有子元素都放在屏幕上。我想它仍然显示动作栏。有没有办法做到这一点？以下是一些代码：
主要活动：
public class MainActivity extends AppCompatActivity {
private SectionsPagerAdapter mSectionsPagerAdapter;
private ViewPager mViewPager;
private static final String SERVER_ADDRESS = "example.com/";
private ImageView profilePic;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(mViewPager);
tabLayout.getTabAt(0).setIcon(R.drawable.ic_people_black_24dp);
tabLayout.getTabAt(1).setIcon(R.drawable.ic_grade_black_24dp);
tabLayout.getTabAt(2).setIcon(R.drawable.ic_mail_black_24dp);
tabLayout.getTabAt(3).setIcon(R.drawable.ic_account_box_black_24dp);
setTitle("Title");
Intent intent = getIntent();
String name = intent.getStringExtra("name");
String username = intent.getStringExtra("username");
String license = intent.getStringExtra("license");
}
@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_main, 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);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_NUMBER = "section_number";
public PlaceholderFragment() {
}
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
TextView textView = (TextView) rootView.findViewById(R.id.section_label);
textView.setText(getString(R.string.section_format, getArguments().getInt(ARG_SECTION_NUMBER)));
return rootView;
}
}
/**
* A {@link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
Browse browse = new Browse();
return browse;
case 1:
MyAgents myAgents = new MyAgents();
return myAgents;
case 2:
Messages messages = new Messages();
return messages;
case 3:
MyProfile myProfile = new MyProfile();
return myProfile;
}
return null;
}
@Override
public int getCount() {
return 4;
}
@Override
public CharSequence getPageTitle(int position) {
return null;
}
}
}
隐藏操作栏的片段：
public class MyProfile extends Fragment {
private static final String SERVER_ADDRESS = "test";
private ImageView profilePic;
private EditText etUsername;
private EditText etLicense;
private TextView welcomeMessage;
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.my_profile, container, false);
String message = getActivity().getIntent().getExtras().getString("name") + " welcome!";
etUsername = (EditText) view.findViewById(R.id.etUsername);
etLicense = (EditText) view.findViewById(R.id.etLicense);
welcomeMessage = (TextView) view.findViewById(R.id.tvWelcomeMsg);
profilePic = (ImageView) view.findViewById(R.id.ivProfilePicture);
etUsername.setText(getActivity().getIntent().getExtras().getString("username"));
etLicense.setText(getActivity().getIntent().getExtras().getString("license"));
welcomeMessage.setText(message);
new MyProfile.DownloadImage(getActivity().getIntent().getExtras().getString("license")).execute();
return view;
}
清单：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example" >
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme" >
<activity
android:name=".LoginActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".RegisterActivity" />
<activity android:name=".MainActivity" android:windowSoftInputMode="adjustResize" android:theme="@style/AppTheme"></activity>
</application>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
</manifest>
片段布局：
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/ScrollView01"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
android:scrollbars="none" >
<LinearLayout android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingLeft="16dp">
<ImageView
android:id="@+id/ivProfilePicture"
android:layout_width="150dp"
android:layout_height="150dp"
android:src="@drawable/ic_person_black_120dp"
android:layout_gravity="center"/>
<TextView
android:id="@+id/tvWelcomeMsg"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingBottom="32dp"
android:text="TextView"
android:layout_gravity="center"/>
<TextView
android:id="@+id/tvUsername"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Username" />
<EditText
android:id="@+id/etUsername"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="textPersonName"
android:text="Name" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="License"
android:layout_marginTop="45dp" />
<EditText
android:id="@+id/etLicense"
android:layout_width="352dp"
android:layout_height="44dp"
android:ems="10"
android:inputType="text"
android:text="License" />
</LinearLayout>
</ScrollView>
任何人都知道如何解决这个问题？我想也许因为它是在滚动视图中它会滚动而不是切断屏幕的顶部（动作栏所在的位置）。我一直在寻找无处不在，似乎无法找到解决这个问题的方法。非常感谢任何帮助。
谢谢。
答案 0 :(得分：0)
删除app时：layout_scrollFlags =＆＃34;滚动| enterAlways＆＃34;从工具栏中将工具栏设置为固定位置并删除此问题。