我一直试图隐藏通知栏，让我的应用全屏：
我尝试了一些示例代码，但它们不起作用，有：
1＃android:theme="@android:style/Theme.Holo.NoActionBar.Fullscreen"
2＃
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_main);
请参阅下面的logcat错误：...
这是我的代码，谢谢你的帮助：
MainActivity
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends ActionBarActivity {
public static final String TAG = MainActivity.class.getSimpleName();
ActionBar actionBar;
// Declare Tab Variable
ActionBar.Tab Tab1, Tab2, Tab3;
Fragment fragmentTab1 = new FragmentTab1();
Fragment fragmentTab2 = new FragmentTab2();
Fragment fragmentTab3 = new FragmentTab3();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Hide Action Bar
actionBar = getSupportActionBar();
// Hide Actionbar Icon
actionBar.setDisplayShowHomeEnabled(true);
// Hide Actionbar Title
actionBar.setDisplayShowTitleEnabled(true);
// Create Actionbar Tabs
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Set Tab Icon and Titles
Tab1 = actionBar.newTab().setText("Asian");//.setIcon(R.drawable.tab1);
Tab2 = actionBar.newTab().setText("Euro");
Tab3 = actionBar.newTab().setText("Black");
// Set Tab Listeners
Tab1.setTabListener(new TabListener(fragmentTab1));
Tab2.setTabListener(new TabListener(fragmentTab2));
Tab3.setTabListener(new TabListener(fragmentTab3));
// Add tabs to actionbar
actionBar.addTab(Tab1);
actionBar.addTab(Tab2);
actionBar.addTab(Tab3);
}//-----end onCreate
//Action bar of AppCombat -------------------------------------------------------------------------
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.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();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}//--end body
的themes.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="customTheme" parent="android:Theme">
<item name="android:windowTitleBackgroundStyle">@style/WindowTitleBackground</item>
<item name="android:windowFullscreen">true</item>
</style>
</resources>
styles.xml
<resources>
<!--
Base application theme, dependent on API level. This theme is replaced
by AppBaseTheme from res/values-vXX/styles.xml on newer devices.
-->
<style name="AppBaseTheme" parent="Theme.AppCompat.Light">
<item name="android:windowNoTitle">true</item>
<!--
Theme customizations available in newer API levels can go in
res/values-vXX/styles.xml, while customizations related to
backward-compatibility can go here.
-->
</style>
<!-- Application theme. -->
<style name="AppTheme" parent="AppBaseTheme">
<!-- All customizations that are NOT specific to a particular API-level can go here. -->
</style>
<style name="myImageView">
<!-- 3dp so the background border to be visible -->
<item name="android:padding">3dp</item>
<item name="android:background">@drawable/image_border</item>
<item name="android:scaleType">fitCenter</item>
</style>
<style name="WindowTitleBackground">
<item name="android:background">@color/titlebackgroundcolor</item>
</style>
</resources>
** LogCat日志：样本2＃**
06-26 11:18:01.753: D/AndroidRuntime(19490): Shutting down VM
06-26 11:18:01.753: W/dalvikvm(19490): threadid=1: thread exiting with uncaught exception (group=0x411172a0)
06-26 11:18:01.753: E/AndroidRuntime(19490): FATAL EXCEPTION: main
06-26 11:18:01.753: E/AndroidRuntime(19490): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.brazilapps/com.example.brazilapps.MainActivity}: java.lang.NullPointerException
06-26 11:18:01.753: E/AndroidRuntime(19490): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2110)
06-26 11:18:01.753: E/AndroidRuntime(19490): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
06-26 11:18:01.753: E/AndroidRuntime(19490): at android.app.ActivityThread.access$700(ActivityThread.java:140)
06-26 11:18:01.753: E/AndroidRuntime(19490): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1237)
06-26 11:18:01.753: E/AndroidRuntime(19490): at android.os.Handler.dispatchMessage(Handler.java:99)
06-26 11:18:01.753: E/AndroidRuntime(19490): at android.os.Looper.loop(Looper.java:137)
06-26 11:18:01.753: E/AndroidRuntime(19490): at android.app.ActivityThread.main(ActivityThread.java:4921)
06-26 11:18:01.753: E/AndroidRuntime(19490): at java.lang.reflect.Method.invokeNative(Native Method)
06-26 11:18:01.753: E/AndroidRuntime(19490): at java.lang.reflect.Method.invoke(Method.java:511)
06-26 11:18:01.753: E/AndroidRuntime(19490): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
06-26 11:18:01.753: E/AndroidRuntime(19490): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)
06-26 11:18:01.753: E/AndroidRuntime(19490): at dalvik.system.NativeStart.main(Native Method)
06-26 11:18:01.753: E/AndroidRuntime(19490): Caused by: java.lang.NullPointerException
06-26 11:18:01.753: E/AndroidRuntime(19490): at com.example.brazilapps.MainActivity.onCreate(MainActivity.java:46)
06-26 11:18:01.753: E/AndroidRuntime(19490): at android.app.Activity.performCreate(Activity.java:5188)
06-26 11:18:01.753: E/AndroidRuntime(19490): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
06-26 11:18:01.753: E/AndroidRuntime(19490): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2074)
06-26 11:18:01.753: E/AndroidRuntime(19490): ... 11 more
答案 0 :(得分：0)
首先，您是否已将示例中的布局名称更改为您的布局名称？你有没有尝试过这种方式？
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_main); // not R.layout.main
那么这段代码在做什么？我认为它绝对不会隐藏任何东西
//Hide Action Bar
actionBar = getSupportActionBar();
// Hide Actionbar Icon
actionBar.setDisplayShowHomeEnabled(true);
// Hide Actionbar Title
actionBar.setDisplayShowTitleEnabled(true);