安卓布局标题栏不可见。

Question

我已经创建了XML布局文件。当我将它作为内容提供给我的Activity时，标题栏不可见。如何使其可见？我尝试使用setTitle("Title");

protected void onCreate(Bundle savedInstanceState) { 
getWindow().addFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN); 
getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN); 
super.onCreate(savedInstanceState); 
Bundle b = getIntent().getExtras(); 
int layoutId = b.getInt("layout");
Log.d("====>>>", " " + layoutId);
setContentView(layoutId); 
setTitle("Title"); 
}

在onCreate()方法中的函数不起作用。这是我的xml文件。

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/ScrollView01"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >

<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" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="com.universityapp.enrollee.FacultyInformationActivity"
    android:scrollbars="vertical"
    >

     <TextView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:text="@string/text_faculty_information_agro"
        android:textSize="15dp"
        android:textAlignment="center"
    />
</RelativeLayout>
</ScrollView>

我通过ListView启动活动:

 profListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

            switch (position){
                case 0:
                    facultyInfoIntent = new Intent(getBaseContext(), FacultyInformationActivity.class);
                    Bundle b = new Bundle();
                    b.putInt("layout", facultyLayoutNames[position]);
                    facultyInfoIntent.putExtras(b);
                    startActivity(facultyInfoIntent);
            }

            Log.d("Selected faculty", facultiNames[position]);
        }
    });

这是我的清单：

    <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.universityapp.universityapp" >

    <uses-permission android:name="android.permission.CALL_PHONE" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.CALL_PHONE" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity android:name="com.universityapp.common.MainActivity" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.universityapp.common.MenuActivity"
            android:label="Главное меню" >
        </activity>
        <activity
            android:name="com.universityapp.enrollee.ContacsActivity"
            android:label="Наши контакты" >
        </activity>
        <activity
            android:name="com.universityapp.enrollee.Map"
            android:label="@string/title_activity_map" >
        </activity>

        <meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />
        <meta-data
            android:name="com.google.android.maps.v2.API_KEY"
            android:value="@string/google_maps_key" />

        <activity
            android:name="com.universityapp.enrollee.MapsActivity"
            android:label="@string/title_activity_maps" >
        </activity>
        <activity
            android:name="com.universityapp.bachelor.PlatonusActivity"
            android:label="@string/title_activity_platonus" >
        </activity>
        <activity
            android:name="com.universityapp.database.DatabaseActivity"
            android:label="@string/title_activity_database" >
        </activity>
        <activity
            android:name="com.universityapp.enrollee.EnrUniversityInfo"
            android:label="@string/title_activity_enr_university_info" >
        </activity>
        <activity
            android:name="com.universityapp.enrollee.ProfessionsActivity"
            android:label="@string/title_activity_professions" >
        </activity>
        <activity
            android:name="com.universityapp.enrollee.FacultyInformationActivity"
            android:label="@string/title_activity_faculty_information" >
        </activity>
    </application>

</manifest>

- Makko

---

您无法看到标题栏或标题栏中的标题吗？ - Adrian Cid Almaguer

我看不到标题栏。 - Makko

发布你的 manifest.xml。 - Adrian Cid Almaguer

@AdrianCidAlmaguer 这是我的清单。 - Makko

Answer 1

变更：

public class MainActivity extends Activity{

}

请在您的类文件中进行如下修改：

public class MainActivity extends AppCompatActivity{

}

- karthik kumar

Answer 2

我找到了答案！我将Activity更改为ActionBarActivity，它可以正常运作！

- Makko

---

如果适用的话，AppCompatActivity 对我也有效。 - Kajal

Answer 3

为了显示标题栏，您可以在onCreate中使用以下代码：

getWindow().addFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);

- Adrian Cid Almaguer

---

无法工作：protected void onCreate(Bundle savedInstanceState) { getWindow().addFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN); getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN); super.onCreate(savedInstanceState); Bundle b = getIntent().getExtras(); int layoutId = b.getInt("layout"); Log.d("====>>>", " " + layoutId); setContentView(layoutId); setTitle("Title"); } - Makko

@Makko 是的，在这个位置尝试并告诉我结果。 - Adrian Cid Almaguer

Answer 4

你可以通过这种方式来完成（如HafizWaleedHussain建议的那样）：

public void showTitle() {
            try {
                    ((View) findViewById(android.R.id.title).getParent())
                                    .setVisibility(View.VISIBLE);
            } catch (Exception e) {
            }
            getWindow().addFlags(
                            WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
    }

如果这个方法没有起作用，那么请打开您的Android清单文件，并删除此行（如果存在）：

 android:theme="@android:style/Theme.NoTitleBar"

- Jethro Monzada

Answer 5

进入 styles.xml 并创建一个新样式

<style name="CustomWindowTitleBackground">
        <item name="android:background">#323331</item>
        <item name="android:windowNoTitle">false</item>
     </style>

并在 Manifest 中调用它（您还可以在 item 标签中添加其他功能）

 <activity
            android:name=".st.activity.MyGoogleMap"
            android:theme="@style/CustomWindowTitleBackground">
            <intent-filter>
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

- Samir

Answer 6

I removed the statement android:theme="@style/AppTheme" in the application tag and the bar started appearing

   <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        **android:theme="@style/AppTheme"**>

- Ashish Gupta