java Android 无法解析构造函数意图
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Android cannot resolve constructor intent
提问by Jonathan Chappell
Here is a section of my code. I am trying to make a navigation menu in which when you click on the first list item it launches the activity MrsClubb. However when I put this into my code it comes up with the error:
这是我的代码的一部分。我正在尝试制作一个导航菜单，当您单击第一个列表项时，它会启动活动MrsClubb。然而，当我把它放到我的代码中时，它出现了错误：
Cannot resolve constructor 'Intent(android.widget.AdapterView.OnItemClickListener,java.lang.Class<com....etc>)'
Any ideas how to resolve this?
任何想法如何解决这个问题？
The double ** shows where in the code the error is.
双 ** 显示错误在代码中的位置。
Here is the section of the code:
这是代码的一部分：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar)findViewById(R.id.toolbar);
mDrawerLayout = (DrawerLayout)findViewById(R.id.drawer);
mDrawerList = (ListView)findViewById(android.R.id.list);
mDrawerListItems = getResources().getStringArray(R.array.drawer_list);
mDrawerList.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, mDrawerListItems));
mDrawerList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
switch(position) {
case 0:
Intent i = new Intent**(this, MrsClubb.class);**
startActivity(i);
}
mDrawerLayout.closeDrawer(mDrawerList);
}
});
mDrawerToggle = new ActionBarDrawerToggle(this,
mDrawerLayout,
toolbar,
R.string.drawer_open,
R.string.drawer_close){
public void onDrawerClosed(View v){
super.onDrawerClosed(v);
invalidateOptionsMenu();
syncState();
}
public void onDrawerOpened(View v){
super.onDrawerOpened(v);
invalidateOptionsMenu();
syncState();
}
};
回答by Y.S
The Problem:
问题：
You cannot use thisto refer to the Activityinside an inner class, as thisbecomes a reference to the inner class. The meaning of the constructor not resolvedmessage is that the compiler interprets it as
您不能使用this来引用Activity内部类的内部，因为它this会成为对内部类的引用。该constructor not resolved消息的含义是编译器将其解释为
Intent(AdapterView.OnItemClickListener listener, Class class)
which it does not recognize, instead of
它不承认，而不是
Intent(Context context, Class class)
which is correct and what the compiler expects.
这是正确的以及编译器所期望的。
The Solution:
解决方案：
Replace
代替
Intent i = new Intent(this, MrsClubb.class);
with
和
Intent i = new Intent(MyActivity.this, MrsClubb.class);
where MyActivityis the name of the Activityclass in which this code belongs.
哪里MyActivity是Activity此代码所属的类的名称。
