Android Activity设置无标题和全屏

在Activity的onCreate函数前，加入如下代码

//无title
requestWindowFeature(Window.FEATURE_NO_TITLE);
//全屏
getWindow().setFlags(WindowManager.LayoutParams. FLAG_FULLSCREEN ,  
              WindowManager.LayoutParams. FLAG_FULLSCREEN); 

Alternatively you can add
android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
to AndroidManifest.xml under <activity>