“满纸自怜题素怨,片言谁解诉秋心” 今天在运行安卓程序时,出现如下错误: 找了一圈后发现,是因为我在onCreate方法里写了
@Override
protected void onCreate(Bundle savedInstanceState) {
super
.onCreate(savedInstanceState)
setContentView(R
.layout.activity_main)
navView = (NavigationView) findViewById(R
.id.nav_view)
Log
.d(
"navView",navView
.toString())
}
是因为这里的nav_view不是在activity_main.xml里面,所以就会报空指针异常 应该先使用inflate获得另外的xml文件.再使用findViewById方法获取.
View account = View
.inflate(this, R
.layout.account, null)
navView = (NavigationView)account
.findViewById(R
.id.nav_view)
Log
.d(
"navView",navView
.toString())
这样就OK啦.
