如何处理回在android的活动抽屉名单片段事件 [英] how to handle back event in drawer list fragment in android activity
本文介绍了如何处理回在android的活动抽屉名单片段事件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我已经开发了有一个活动，这个活动也有增加抽屉列表项（侧面）的一些片段。所以我的问题是，当我在抽屉里的任何片段项目，然后打开pressed后退按钮的应用程序应用程序将close.So如何处理回事件类似3 - 当pressed回其开放式precious片段2 -1
主要活动的code
公共类MainActivity扩展FragmentActivity {
私人DrawerLayout DrawerLayout;
私人的ListView DrawerList;
私人ActionBarDrawerToggle DrawerToggle; 私人CharSequence的DrawerTitle; 私人CharSequence的称号; 私有String [] MenuTitles;
私人TypedArray MenuIcons; 私人DrawerListAdapter适配器;
私人的ArrayList＆LT; DrawerItem＆GT; DrawerItems; @燮pressLint（NewApi）
@覆盖
保护无效的onCreate（捆绑savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.activity_main）; 标题= DrawerTitle =的getTitle（）; MenuTitles = getResources（）getStringArray（R.array.drawer_items）。 MenuIcons = getResources（）obtainTypedArray（R.array.drawer_icons）。 DrawerLayout =（DrawerLayout）findViewById（R.id.drawer_layout）;
DrawerList =（ListView控件）findViewById（R.id.list_slidermenu）; DrawerItems =新的ArrayList＆LT; DrawerItem＆GT;（）; DrawerItems.add（新DrawerItem（MenuTitles [0]，MenuIcons.getResourceId（
0，-1）））; DrawerItems.add（新DrawerItem（MenuTitles [1]，MenuIcons.getResourceId（
1，-1）））; DrawerItems.add（新DrawerItem（MenuTitles [2]，MenuIcons.getResourceId（
2，-1）））; DrawerItems.add（新DrawerItem（MenuTitles [3]，MenuIcons.getResourceId（
3，-1）））; DrawerItems.add（新DrawerItem（MenuTitles [4]，MenuIcons.getResourceId（
4，-1）））; DrawerItems.add（新DrawerItem（MenuTitles [5]，MenuIcons.getResourceId（
5，-1）））; DrawerItems.add（新DrawerItem（MenuTitles [6]，MenuIcons.getResourceId（
6，-1）））; MenuIcons.recycle（）; DrawerList.setOnItemClickListener（新SlideMenuClickListener（））; 适配器=新DrawerListAdapter（getApplicationContext（），DrawerItems）;
DrawerList.setAdapter（适配器）; getActionBar（）setDisplayHomeAsUpEnabled（真）。
getActionBar（）setHomeButtonEnabled（真）。 DrawerToggle =新ActionBarDrawerToggle（这一点，DrawerLayout，
R.drawable.ic_drawer，R.string.app_name，R.string.app_name）{
公共无效onDrawerClosed（查看视图）{
。getActionBar（）的setTitle（标题）; invalidateOptionsMenu（）;
} 公共无效onDrawerOpened（查看drawerView）{
。getActionBar（）的setTitle（DrawerTitle）; invalidateOptionsMenu（）;
}
};
DrawerLayout.setDrawerListener（DrawerToggle）; 如果（savedInstanceState == NULL）{ displayView（0）;
}
} 私有类SlideMenuClickListener工具
ListView.OnItemClickListener {
@覆盖
公共无效onItemClick（适配器视图＆LT;＆GT;母公司，观景，INT位置，
长ID）{ displayView（位置）;
}
} @覆盖
公共布尔onCreateOptionsMenu（菜单菜单）{
。getMenuInflater（）膨胀（R.menu.main，菜单）;
返回true;
} @覆盖
公共布尔onOptionsItemSelected（菜单项项）{ 如果（DrawerToggle.onOptionsItemSelected（项目））{
返回true;
} 开关（item.getItemId（））{
案例R.id.action_settings：
返回true;
默认：
返回super.onOptionsItemSelected（项目）;
}
} @覆盖
prepareOptionsMenu（菜单菜单）上公共布尔{ 布尔drawerOpen = DrawerLayout.isDrawerOpen（DrawerList）;
menu.findItem（R.id.action_settings）.setVisible（drawerOpen！）;
返回super.on prepareOptionsMenu（菜单）;
} @燮pressLint（NewApi）
私人无效displayView（INT位置）{ 片段片段= NULL;
开关（位置）{
情况下0：
片段=新Home_Activity（）;
打破;
情况1：
片段=新Activity_two（）;
打破;
案例2：
片段=新Activity_three（）;
打破;
案例3：
片段=新Activity_four（）;
打破;
情况4：
片段=新Activity_five（）;
打破;
情况5：
片段=新Activity_six（）;
打破;
情况6：
片段=新Activity_seven（）;
打破; 默认：
打破;FragmentTransaction交易= getFragmentManager（）调用BeginTransaction（）。
transaction.replace（R.id.frame_container，片段）;
transaction.addToBackStack（NULL）;
器transaction.commit（）;
} 如果（片段！= NULL）{
FragmentManager fragmentManager = getFragmentManager（）;
fragmentManager.beginTransaction（）
.replace（R.id.frame_container，片段）.commit（）; DrawerList.setItemChecked（位置，真正的）;
DrawerList.setSelection（位置）;
的setTitle（MenuTitles [位置]）;
DrawerLayout.closeDrawer（DrawerList）;
}其他{ Log.e（MainActivity，出错创建片段）;
}
} @燮pressLint（NewApi）
@覆盖
公共无效的setTitle（CharSequence的标题）{
标题=称号;
。getActionBar（）的setTitle（标题）;
} @覆盖
保护无效onPostCreate（捆绑savedInstanceState）{
super.onPostCreate（savedInstanceState）; DrawerToggle.syncState（）;
}
一个片段code ... 公共类Activiy_three扩展片段{ 私人GridView控件库; @覆盖
公共查看onCreateView（LayoutInflater充气器，容器的ViewGroup，
捆绑savedInstanceState）{ 视图V = inflater.inflate（R.layout.activity_three_fragment，
集装箱，FALSE）;
清单＆LT;项目＆GT;照片=新的ArrayList＆LT;项目＆GT;（）;
// TODO：发展为每个日期的照片
Images.add（新项目（图片1，R.drawable.penguins））;
Images.add（新项目（图片1，R.drawable.pulips））;
Images.add（新项目（图片1，R.drawable.lighthouse））;
Images.add（新项目（图片1，R.drawable.koala））;
Images.add（新项目（图片1，R.drawable.jellyfish））;
Images.add（新项目（图片1，R.drawable.hydrangeas））;
Images.add（新项目（图片1，R.drawable.chrysanthemum））;
Images.add（新项目（图片1，R.drawable.home））; 画廊=（GridView控件）v.findViewById（R.id.gridview）;
Global.photoAdapter =新PhotoAdapter（getActivity（），图像，FALSE）;
gallery.setAdapter（Global.photoAdapter）; gallery.setOnItemClickListener（新AdapterView.OnItemClickListener（）{ 公共无效onItemClick（适配器视图＆LT;＆GT;母公司，观景，INT
位置，长的id）{//意图I =新意图（getActivity（），FullImageActivity.class）;
// i.putExtra（Global.Id，位置）;
// startActivity（ⅰ）; 片段片段=新FullImageActivity（）;
FragmentManager fragmentManager = getFragmentManager（）; 捆绑ARGS =新包（）;
args.putInt（Global.Id，位置）;
fragment.setArguments（参数）; fragmentManager.beginTransaction（）
.replace（R.id.frame_container，片段）.commit（）;
}
}）;
返回伏;
}
}
解决方案
您需要的片段添加到backstack
FragmentTransaction交易= getFragmentManager（）调用BeginTransaction（）。
transaction.replace（R.id.fragment_container，片段）;
transaction.addToBackStack（NULL）;
器transaction.commit（）;
您还可以使用 popBackStack（）从栈中弹出片段
http://developer.android.com/reference/android/app/FragmentManager.html#popBackStack()
编辑：
您有什么
默认：
打破; FragmentTransaction交易= getFragmentManager（）调用BeginTransaction（）。
transaction.replace（R.id.frame_container，片段）;
transaction.addToBackStack（NULL）;
器transaction.commit（）;
}
应
私人无效displayView（INT位置）{ 片段片段= NULL;
开关（位置）{
情况下0：
片段=新Home_Activity（）;
打破;
情况1：
片段=新Activity_two（）;
打破;
案例2：
片段=新Activity_three（）;
打破;
案例3：
片段=新Activity_four（）;
打破;
情况4：
片段=新Activity_five（）;
打破;
情况5：
片段=新Activity_six（）;
打破;
情况6：
片段=新Activity_seven（）;
打破; 默认：
打破; } 如果（片段！= NULL）{
FragmentTransaction交易= getFragmentManager（）调用BeginTransaction（）。
transaction.replace（R.id.frame_container，片段）;
transaction.addToBackStack（NULL）;
器transaction.commit（）; DrawerList.setItemChecked（位置，真正的）;
DrawerList.setSelection（位置）;
的setTitle（MenuTitles [位置]）;
DrawerLayout.closeDrawer（DrawerList）;
}其他{ Log.e（MainActivity，出错创建片段）;
}
}
I have developed an application that have one activity and in this activity there are add some fragment in drawer list item (side).So my issue is when I am open on any drawer fragment item and then pressed back button application going to close.So how to handle back event like 3 - 2 -1 when pressed back its open precious fragment.
Code of main activity
public class MainActivity extends FragmentActivity {
private DrawerLayout DrawerLayout;
private ListView DrawerList;
private ActionBarDrawerToggle DrawerToggle;
private CharSequence DrawerTitle;
private CharSequence Title;
private String[] MenuTitles;
private TypedArray MenuIcons;
private DrawerListAdapter adapter;
private ArrayList<DrawerItem> DrawerItems;
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Title = DrawerTitle = getTitle();
MenuTitles = getResources().getStringArray(R.array.drawer_items);
MenuIcons = getResources().obtainTypedArray(R.array.drawer_icons);
DrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
DrawerList = (ListView) findViewById(R.id.list_slidermenu);
DrawerItems = new ArrayList<DrawerItem>();
DrawerItems.add(new DrawerItem(MenuTitles[0], MenuIcons.getResourceId(
0, -1)));
DrawerItems.add(new DrawerItem(MenuTitles[1], MenuIcons.getResourceId(
1, -1)));
DrawerItems.add(new DrawerItem(MenuTitles[2], MenuIcons.getResourceId(
2, -1)));
DrawerItems.add(new DrawerItem(MenuTitles[3], MenuIcons.getResourceId(
3, -1)));
DrawerItems.add(new DrawerItem(MenuTitles[4], MenuIcons.getResourceId(
4, -1)));
DrawerItems.add(new DrawerItem(MenuTitles[5], MenuIcons.getResourceId(
5, -1)));
DrawerItems.add(new DrawerItem(MenuTitles[6], MenuIcons.getResourceId(
6, -1)));
MenuIcons.recycle();
DrawerList.setOnItemClickListener(new SlideMenuClickListener());
adapter = new DrawerListAdapter(getApplicationContext(), DrawerItems);
DrawerList.setAdapter(adapter);
getActionBar().setDisplayHomeAsUpEnabled(true);
getActionBar().setHomeButtonEnabled(true);
DrawerToggle = new ActionBarDrawerToggle(this, DrawerLayout,
R.drawable.ic_drawer, R.string.app_name, R.string.app_name) {
public void onDrawerClosed(View view) {
getActionBar().setTitle(Title);
invalidateOptionsMenu();
}
public void onDrawerOpened(View drawerView) {
getActionBar().setTitle(DrawerTitle);
invalidateOptionsMenu();
}
};
DrawerLayout.setDrawerListener(DrawerToggle);
if (savedInstanceState == null) {
displayView(0);
}
}
private class SlideMenuClickListener implements
ListView.OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
displayView(position);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (DrawerToggle.onOptionsItemSelected(item)) {
return true;
}
switch (item.getItemId()) {
case R.id.action_settings:
return true;
default:
return super.onOptionsItemSelected(item);
}
}
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
boolean drawerOpen = DrawerLayout.isDrawerOpen(DrawerList);
menu.findItem(R.id.action_settings).setVisible(!drawerOpen);
return super.onPrepareOptionsMenu(menu);
}
@SuppressLint("NewApi")
private void displayView(int position) {
Fragment fragment = null;
switch (position) {
case 0:
fragment = new Home_Activity();
break;
case 1:
fragment = new Activity_two();
break;
case 2:
fragment = new Activity_three();
break;
case 3:
fragment = new Activity_four();
break;
case 4:
fragment = new Activity_five();
break;
case 5:
fragment = new Activity_six();
break;
case 6:
fragment = new Activity_seven();
break;
default:
break;
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.replace(R.id.frame_container, fragment);
transaction.addToBackStack(null);
transaction.commit();
}
if (fragment != null) {
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.frame_container, fragment).commit();
DrawerList.setItemChecked(position, true);
DrawerList.setSelection(position);
setTitle(MenuTitles[position]);
DrawerLayout.closeDrawer(DrawerList);
} else {
Log.e("MainActivity", "Error in creating fragment");
}
}
@SuppressLint("NewApi")
@Override
public void setTitle(CharSequence title) {
Title = title;
getActionBar().setTitle(Title);
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
DrawerToggle.syncState();
}
one fragment code...
public class Activiy_three extends Fragment {
private GridView gallery;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.activity_three_fragment,
container, false);
List<Item> Images = new ArrayList<Item>();
//todo : develop as per date photo
Images.add(new Item("Image 1", R.drawable.penguins));
Images.add(new Item("Image 1", R.drawable.pulips));
Images.add(new Item("Image 1", R.drawable.lighthouse));
Images.add(new Item("Image 1", R.drawable.koala));
Images.add(new Item("Image 1", R.drawable.jellyfish));
Images.add(new Item("Image 1", R.drawable.hydrangeas));
Images.add(new Item("Image 1", R.drawable.chrysanthemum));
Images.add(new Item("Image 1", R.drawable.home));
gallery = (GridView) v.findViewById(R.id.gridview);
Global.photoAdapter = new PhotoAdapter(getActivity(), Images,false);
gallery.setAdapter(Global.photoAdapter);
gallery.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int
position, long id) {
// Intent i = new Intent(getActivity(), FullImageActivity.class);
// i.putExtra(Global.Id, position);
// startActivity(i);
Fragment fragment = new FullImageActivity();
FragmentManager fragmentManager = getFragmentManager();
Bundle args = new Bundle();
args.putInt(Global.Id, position);
fragment.setArguments(args);
fragmentManager.beginTransaction()
.replace(R.id.frame_container, fragment).commit();
}
});
return v;
}
}
解决方案
You need add the fragment to the backstack
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.replace(R.id.fragment_container, fragment);
transaction.addToBackStack(null);
transaction.commit();
And you can use popBackStack() to pop the fragment from the stack
http://developer.android.com/reference/android/app/FragmentManager.html#popBackStack()
Edit:
What you have
default:
break;
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.replace(R.id.frame_container, fragment);
transaction.addToBackStack(null);
transaction.commit();
}
Should be
private void displayView(int position) {
Fragment fragment = null;
switch (position) {
case 0:
fragment = new Home_Activity();
break;
case 1:
fragment = new Activity_two();
break;
case 2:
fragment = new Activity_three();
break;
case 3:
fragment = new Activity_four();
break;
case 4:
fragment = new Activity_five();
break;
case 5:
fragment = new Activity_six();
break;
case 6:
fragment = new Activity_seven();
break;
default:
break;
}
if (fragment != null) {
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.replace(R.id.frame_container, fragment);
transaction.addToBackStack(null);
transaction.commit();
DrawerList.setItemChecked(position, true);
DrawerList.setSelection(position);
setTitle(MenuTitles[position]);
DrawerLayout.closeDrawer(DrawerList);
} else {
Log.e("MainActivity", "Error in creating fragment");
}
}
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