两种方法，第一种是静态开启方法
把application 或者 activity的主题设置为Theme.Holo即可

? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.baidu.homer" android:versionCode="1" android:versionName="1.0"> <uses-sdk android:minSdkVersion="18"/> <application android:label="@string/app_name" android:icon="@drawable/ic_launcher" android:theme="@android:style/Theme.Holo"> <activity android:name="MyActivity" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN"/> <category android:name="android.intent.category.LAUNCHER"/> </intent-filter> </activity> </application> </manifest>

第二种是动态开启

? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 import android.app.ActionBar; import android.app.Activity; import android.drm.DrmStore; import android.os.Bundle; public class MyActivity extends Activity { /** * Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); ActionBar actionBar = getActionBar(); actionBar.show(); } }