DrawerItemClickListener不能被解析为一个类型 [英] DrawerItemClickListener cannot be resolved to a type
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问题描述
我在建立DrawerItemClickListener但是我得到一个错误，说明的过程：即使我宣布该方法在code进一步向下DrawerItemClickListener不能被解析为一个类型。我看了过来好几次，我不明白我做错了。
私人无效_initMenu（）{ drawerListView.setOnItemClickListener（新DrawerItemClickListener（））; } 处理器ResponseHandler所=新的处理程序（）{
@覆盖
公共无效的handleMessage（消息MSG）{
populateListWithVideos（MSG）;
};
}; 私人无效populateListWithVideos（消息MSG）{
库lib =（库）msg.getData（）得到（
GetYouTubeUserVideosTask.LIBRARY）;
listView.setVideos（lib.getVideos（））;
} @覆盖
保护无效的onStop（）{
ResponseHandler所= NULL;
super.onStop（）;
} @覆盖
公共无效onVideoClicked（视频短片）{
意向意图=新意图（这一点，Player.class）;
intent.putExtra（ID，video.getId（））;
intent.putExtra（称号，video.getTitle（））;
intent.putExtra（上载，video.getUploader（））;
intent.putExtra（观看次数，video.getviewCount（））;
startActivity（意向）;
} @覆盖
公共无效onConfigurationChanged（配置NEWCONFIG）{
super.onConfigurationChanged（NEWCONFIG）;
actionBarDrawerToggle.onConfigurationChanged（NEWCONFIG）;
} @覆盖
公共布尔onCreateOptionsMenu（菜单菜单）{
MenuInflater吹气= getMenuInflater（）;
inflater.inflate（R.menu.main，菜单）;
返回super.onCreateOptionsMenu（菜单）;
} @覆盖
公共布尔onOptionsItemSelected（菜单项项）{ 如果（actionBarDrawerToggle.onOptionsItemSelected（项目））{
返回true;
}
返回super.onOptionsItemSelected（项目）;
} 私有类ImagePagerAdapter扩展PagerAdapter {
公共ImagePagerAdapter（活动行为，INT [] mImages，
的String [] stringArra）{
imageArray = mImages;
活性=行为;
字符串数组= stringArra;
} //这是你的构造
公共ImagePagerAdapter（）{
超（）; } 私人诠释[] = mImages新INT [] {R.drawable.selstation_up_btn，
R.drawable.classical_up_btn，R.drawable.country_up_btn，
R.drawable.dance_up_btn，R.drawable.hiphop_up_btn，
R.drawable.island_up_btn，R.drawable.latin_up_btn，
R.drawable.pop_up_btn，R.drawable.samba_up_btn}; 私有String []字符串数组=新的String [] {VEVO
TheMozARTGROUP，TimMcGrawVEVO，TiestoVEVO，
EminemVEVO}; @覆盖
公众诠释的getCount（）{
返回mImages.length;
} @覆盖
公共布尔isViewFromObject（查看视图，Object对象）{
返回查看==（（ImageView的）对象）;
} @覆盖
公共对象instantiateItem（ViewGroup中的容器，INT位置）{
上下文的背景下= Home.this;
ImageView的ImageView的=新ImageView的（上下文）;
imageView.setScaleType（ScaleType.FIT_XY）;
imageView.setImageResource（mImages [位置]）;
（（ViewPager）容器）.addView（ImageView的，0）;
返回ImageView的;
} 公共无效destroyItem（ViewGroup中的容器，INT位置，Object对象）{
（（ViewPager）容器）.removeView（（ImageView的）对象）;
} 私有类DrawerItemClickListener工具
ListView.OnItemClickListener { @覆盖
公共无效onItemClick（适配器视图父母，观景，
INT位置，长的id）{ drawerListView.setItemChecked（位置，真正的）;
字符串文本=菜单中点击......应实行
Toast.makeText（Home.this，文字，Toast.LENGTH_LONG）.show（）;
drawerLayout.closeDrawer（drawerListView）; }
}
}
}
解决方案
您需要创建类DrawerItemClickListener实现ListView.OnItemClickListener 结果结果
在Android的文档完整的例子和说明的https://developer.android.com/training/implementing-navigation/nav-drawer.html#ListItemClicks
这是它的片段：结果
私有类DrawerItemClickListener实现ListView.OnItemClickListener {
@覆盖
公共无效onItemClick（适配器视图父母，观景，INT位置，长的id）{
选择信息（位置）;
}
}/ **片段互换的主要内容视图* /
私人无效选择信息（INT位置）{
//创建一个新片段，并指定这个星球表明，基于对位置
片段片段=新PlanetFragment（）;
捆绑ARGS =新包（）;
args.putInt（PlanetFragment.ARG_PLANET_NUMBER，位置）;
fragment.setArguments（参数）; //将替换现有的片段插入片段
FragmentManager fragmentManager = getFragmentManager（）;
fragmentManager.beginTransaction（）
.replace（R.id.content_frame，片段）
。承诺（）; //高亮显示所选项目，更新称号，并关上抽屉
mDrawerList.setItemChecked（位置，真正的）;
的setTitle（mPlanetTitles [位置]）;
mDrawerLayout.closeDrawer（mDrawerList）;
}
I'm in the process of setting up a DrawerItemClickListener however I'm getting an error stating: DrawerItemClickListener cannot be resolved to a type even though I declare the method further down in the code. I've looked it over several times and I do not see what I have done wrong.
private void _initMenu() {
drawerListView.setOnItemClickListener(new DrawerItemClickListener());
}
Handler responseHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
populateListWithVideos(msg);
};
};
private void populateListWithVideos(Message msg) {
Library lib = (Library) msg.getData().get(
GetYouTubeUserVideosTask.LIBRARY);
listView.setVideos(lib.getVideos());
}
@Override
protected void onStop() {
responseHandler = null;
super.onStop();
}
@Override
public void onVideoClicked(Video video) {
Intent intent = new Intent(this, Player.class);
intent.putExtra("id", video.getId());
intent.putExtra("title", video.getTitle());
intent.putExtra("uploader", video.getUploader());
intent.putExtra("viewCount", video.getviewCount());
startActivity(intent);
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
actionBarDrawerToggle.onConfigurationChanged(newConfig);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (actionBarDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
private class ImagePagerAdapter extends PagerAdapter {
public ImagePagerAdapter(Activity act, int[] mImages,
String[] stringArra) {
imageArray = mImages;
activity = act;
stringArray = stringArra;
}
// this is your constructor
public ImagePagerAdapter() {
super();
}
private int[] mImages = new int[] { R.drawable.selstation_up_btn,
R.drawable.classical_up_btn, R.drawable.country_up_btn,
R.drawable.dance_up_btn, R.drawable.hiphop_up_btn,
R.drawable.island_up_btn, R.drawable.latin_up_btn,
R.drawable.pop_up_btn, R.drawable.samba_up_btn };
private String[] stringArray = new String[] { "vevo",
"TheMozARTGROUP", "TimMcGrawVEVO", "TiestoVEVO",
"EminemVEVO" };
@Override
public int getCount() {
return mImages.length;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == ((ImageView) object);
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
Context context = Home.this;
ImageView imageView = new ImageView(context);
imageView.setScaleType(ScaleType.FIT_XY);
imageView.setImageResource(mImages[position]);
((ViewPager) container).addView(imageView, 0);
return imageView;
}
public void destroyItem(ViewGroup container, int position, Object object) {
((ViewPager) container).removeView((ImageView) object);
}
private class DrawerItemClickListener implements
ListView.OnItemClickListener {
@Override
public void onItemClick(AdapterView parent, View view,
int position, long id) {
drawerListView.setItemChecked(position, true);
String text = "menu click... should be implemented";
Toast.makeText(Home.this, text, Toast.LENGTH_LONG).show();
drawerLayout.closeDrawer(drawerListView);
}
}
}
}
解决方案
You need to create class DrawerItemClickListener implements ListView.OnItemClickListener
Full example and explanation in Android docs https://developer.android.com/training/implementing-navigation/nav-drawer.html#ListItemClicks
the fragment from it:
private class DrawerItemClickListener implements ListView.OnItemClickListener {
@Override
public void onItemClick(AdapterView parent, View view, int position, long id) {
selectItem(position);
}
}
/** Swaps fragments in the main content view */
private void selectItem(int position) {
// Create a new fragment and specify the planet to show based on position
Fragment fragment = new PlanetFragment();
Bundle args = new Bundle();
args.putInt(PlanetFragment.ARG_PLANET_NUMBER, position);
fragment.setArguments(args);
// Insert the fragment by replacing any existing fragment
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.content_frame, fragment)
.commit();
// Highlight the selected item, update the title, and close the drawer
mDrawerList.setItemChecked(position, true);
setTitle(mPlanetTitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
}
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