requestFeature()must be called before adding content 错误
2015-04-18 10:00
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解决:requestFeature()must be called before adding content 错误
下面是正确的代码,用于隐藏标题的。
super.onCreate(savedInstanceState);
//取消标题
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
然而有时候我们是没有注意到,写成下面那样。
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//取消标题
requestWindowFeature(Window.FEATURE_NO_TITLE);
</pre><pre name="code" class="java" style="color: rgb(102, 102, 102);"><span style="font-size:14px; font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);">这样就会出现java.lang.RuntimeException:Unable to start activity ComponentInfo</span>
原因:因为系统运行开始的时候就已经调用父类的构造方法,接着调用setContentView方法展示了视图界面。R.layout.main是R.java资源类中的一个属性。当你再调用这个方法之后再声明Widget就会报:android.util.AndroidRuntimeException:requestFeature()must be called before adding content
所以前面的那三句中加载Activity的样式的那句代码一定要写在中间。
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