我的应用程序有一个主要活动有一个线性布局和线性布局显示了具有包含按钮和文本查看列表中的一个片段A。我想点击的片段A的列表视图按钮,然后就应更换片段A和片段B。
现在我可以点击的片段A的列表视图中的按钮,但(它没有显示片段B),它显示Android的没有响应。我已经做了调试,我在提交事务的片段B.另一条code得到错误是工作的罚款。
请帮我为什么我收到这个错误 全部code低于
主要活动code
公共类MainActivity延伸活动{
的FrameLayout的FrameLayout = NULL;
@覆盖
保护无效的onCreate(包savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.activity_main);
Log.d(异步,关于创建);
的FrameLayout =(的FrameLayout)findViewById(R.id.fragment_Container);
InstallFragmetA();
}
保护无效InstallFragmetA()
{
碎裂碎裂=新碎裂();
FragmentManager经理= getFragmentManager();
FragmentTransaction交易= getFragmentManager()的BeginTransaction()。
transaction.add(R.id.fragment_Container,碎裂,A);
器transaction.commit();
}
保护无效InstallFragmetB()
{
FragmentB fragmentB =新FragmentB();
FragmentManager经理= getFragmentManager();
FragmentTransaction交易= getFragmentManager()的BeginTransaction()。
transaction.add(R.id.fragment_Container,fragmentB,B);
器transaction.commit();
}
保护无效RemoveFragmetA()
{
Log.d(异步,在删除片段A);
FragmentB fragmentB =新FragmentB();
Log.d(异步,B片段initializeed);
// FragmentManager经理= getFragmentManager();
FragmentTransaction交易= getFragmentManager()的BeginTransaction()。
Log.d(异步,开始的片段交易);
碎裂碎裂=(碎裂)getFragmentManager()findFragmentByTag(A)。
// fragmentA.onDestroy();
// fragmentA.onDestroyView();
transaction.replace(R.id.fragment_Container,fragmentB,B);
Log.d(异步,片段A取代);
// transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
Log.d(异步,碎片失败);
// transaction.addToBackStack(空);
器transaction.commit();
Log.d(异步,事务提交);
}
片段A code
公共类碎裂扩展片段{
MainActivity mainActivity = NULL;
TextView中的TextView = NULL;
的String []好友列表= NULL;
公共碎裂()
{
mainActivity =新MainActivity();
}
//活动活动= NULL;
@覆盖
公共无效onAttach(活动活动){
super.onAttach(活动);
// this.activity =活动;
}
@覆盖
公共无效的onCreate(包savedInstanceState){
super.onCreate(savedInstanceState);
Log.d(异步,关于创建);
}
@Nullable
@覆盖
公共查看onCreateView(LayoutInflater充气,容器的ViewGroup,捆绑savedInstanceState){
Log.d(异步,关于创建视图);
返回inflater.inflate(R.layout.fragmenta,集装箱,假);
}
@覆盖
公共无效onActivityCreated(包savedInstanceState){
super.onActivityCreated(savedInstanceState);
TextView的=(的TextView)getActivity()findViewById(R.id.textView)。
ListView控件列表=(ListView控件)getActivity()findViewById(R.id.listView)。
Log.d(异步,阵是+ getResources()getStringArray(R.array.FriendsList)。);
好友列表= getResources()getStringArray(R.array.FriendsList)。
Log.d(异步,阵是+好友列表[0]);
textView.setText(好友列表[0]);
// ArrayAdapter< CharSequence的>适配器= ArrayAdapter.createFromResource(getActivity(),R.array.FriendsList,R.layout.text);
AdapterClass adapterClass =新AdapterClass(getActivity(),好友列表,mainActivity);
list.setAdapter(adapterClass);
list.setItemsCanFocus(真正的);
list.setFocusable(真正的);
list.setOnItemClickListener(新AdapterView.OnItemClickListener(){
@覆盖
公共无效onItemClick(适配器视图<>母公司视图中查看,INT位置,长的id){
Log.d(异步,A);
Toast.makeText(getActivity(),你好+位置,Toast.LENGTH_LONG).show();
}
});
Log.d(异步,在活动创建);
}
}
里面我是用的片段A适配器类
公共类AdapterClass扩展ArrayAdapter {
按钮BTN;
INT计数器= 0;
上下文C = NULL;
的String []好友列表= NULL;
LayoutInflater升;
MainActivity mainActivity = NULL;
公共AdapterClass(上下文C,的String []好友列表,MainActivity mainActivity){
超级(C,R.layout.a,R.id.textView3,好友列表);
L =(LayoutInflater)c.getSystemService(c.LAYOUT_INFLATER_SERVICE);
Log.d(异步,计数器);
this.c = C;
this.friendList =好友列表;
this.mainActivity = mainActivity;
}
@覆盖
公共查看getView(最终诠释的立场,观点convertView,ViewGroup中父){
Log.d(异步,getView是+位置);
Log.d(异步,计数器+专柜);
查看排= convertView;
Myholder支架=无效;
如果(行== NULL)
{
Log.d(异步,行空);
行= l.inflate(R.layout.a,父母,假);
持有人=新Myholder(行);
row.setTag(保持器);
Log.d(异步,行集标签);
}
其他
{
Log.d(异步,行不为空);
支架=(Myholder)row.getTag();
Log.d(异步,持有人未标记);
}
holder.btn.setText(好友列表[位置]);
holder.text.setText(好友列表[位置]);
holder.btn.setOnClickListener(新View.OnClickListener(){
@覆盖
公共无效的onClick(视图v){
Log.d(异步,单击按钮+好友列表[位置]);
Toast.makeText(C按钮点击+好友列表[位置],Toast.LENGTH_LONG).show();
mainActivity.RemoveFragmetA();
}
});
返回行;
}
}
片段B code
公共类FragmentB扩展片段{
公共无效onAttach(活动活动){
super.onAttach(活动);
// this.activity =活动;
}
@覆盖
公共无效的onCreate(包savedInstanceState){
super.onCreate(savedInstanceState);
Log.d(异步,片段B上创建);
}
@Nullable
@覆盖
公共查看onCreateView(LayoutInflater充气,容器的ViewGroup,捆绑savedInstanceState){
Log.d(异步,片段B上创建视图);
返回inflater.inflate(R.layout.fragmentb,集装箱,假);
}
@覆盖
公共无效onActivityCreated(包savedInstanceState){
super.onActivityCreated(savedInstanceState);
}
}
activity_main.xml
< RelativeLayout的的xmlns:机器人=http://schemas.android.com/apk/res/android
的xmlns:工具=http://schemas.android.com/tools机器人:layout_width =match_parent
机器人:layout_height =match_parent机器人:以下属性来=@扪/ activity_horizontal_margin
机器人:paddingRight =@扪/ activity_horizontal_margin
机器人:paddingTop =@扪/ activity_vertical_margin
机器人:ID =@ + ID / mainActivity
机器人:paddingBottom会=@扪/ activity_vertical_margin工具:上下文=MainActivity。>
<的FrameLayout
机器人:layout_width =FILL_PARENT
机器人:ID =@ + ID / fragment_Container
机器人:layout_height =FILL_PARENT
机器人:layout_alignParentTop =真
机器人:layout_alignParentLeft =真
机器人:layout_alignParentStart =真正的>< /的FrameLayout>
fragmenta.xml
< LinearLayout中的xmlns:机器人=http://schemas.android.com/apk/res/android
机器人:方向=垂直机器人:layout_width =match_parent
机器人:ID =@ + ID / linearLayouts
机器人:layout_height =match_parent>
<的TextView
机器人:layout_width =match_parent
机器人:layout_height =WRAP_CONTENT
机器人:后台=#2233
机器人:textAppearance =机器人:ATTR / textAppearanceLarge
机器人:文本=小文
机器人:ID =@ + ID / TextView的/>
<的ListView
机器人:layout_width =match_parent
机器人:layout_height =WRAP_CONTENT
机器人:ID =@ + ID / ListView控件/>
fragmentb.xml
< LinearLayout中的xmlns:机器人=http://schemas.android.com/apk/res/android
机器人:方向=垂直机器人:layout_width =match_parent
机器人:layout_height =match_parent>
<的TextView
机器人:layout_width =match_parent
机器人:layout_height =WRAP_CONTENT
机器人:后台=#2233
机器人:textAppearance =机器人:ATTR / textAppearanceLarge
机器人:文本=小文
机器人:ID =@ + ID / TextView的/>
<的ListView
机器人:layout_width =match_parent
机器人:layout_height =WRAP_CONTENT
机器人:ID =@ + ID / ListView1的/>
我收到娄错误。
E / AndroidRuntime(1021):java.lang.IllegalStateException:活动已被破坏
E / AndroidRuntime(1021):在android.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1333)
E / AndroidRuntime 1021:在android.app.BackStackRecord.commitInternal(BackStackRecord.java:595)
E / AndroidRuntime(1021):在android.app.BackStackRecord.commit(BackStackRecord.java:574)
E / AndroidRuntime(1021):在com.example.bathla.lab5_asynctasklabtest.MainActivity.InstallFragmetB(MainActivity.java:38)
E / AndroidRuntime(1021):在com.example.bathla.lab5_asynctasklabtest.AdapterClass $ 1.onClick(AdapterClass.java:64)
E / AndroidRuntime(1021):在android.view.View.performClick(View.java:4240)
E / AndroidRuntime(1021):在android.view.View $ PerformClick.run(View.java:17721)
E / AndroidRuntime(1021):在android.os.Handler.handleCallback(Handler.java:730)
E / AndroidRuntime(1021):在android.os.Handler.dispatchMessage(Handler.java:92)
E / AndroidRuntime(1021):在android.os.Looper.loop(Looper.java:137)
E / AndroidRuntime(1021):在android.app.ActivityThread.main(ActivityThread.java:5103)
E / AndroidRuntime(1021):在java.lang.reflect.Method.invokeNative(本机方法)
E / AndroidRuntime(1021):在java.lang.reflect.Method.invoke(Method.java:525)
E / AndroidRuntime(1021):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:737)
E / AndroidRuntime(1021):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
E / AndroidRuntime(1021):在dalvik.system.NativeStart.main(本机方法)
解决方案
MainActivity
公共类MainActivity扩展活动实现FragmentAListener
{
私人碎裂碎裂;
私人FragmentB fragmentB;
@覆盖
保护无效的onCreate(包savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.activity_main);
碎裂=(碎裂)getFragmentManager()findFragmentByTag(FragmentA.class.getSimpleName())。
如果(savedInstanceState == NULL){
碎裂=新碎裂();
replaceToFragment(碎裂,假);
}
}
@覆盖
公共无效onListItemButtonClicked(ItemName字符串){
fragmentB =新FragmentB();
束束=新包();
bundle.putString(FragmentB.ITEM_NAME_KEY,了itemname);
fragmentB.setArguments(包);
replaceToFragment(fragmentB,真正的);
}
公共无效replaceToFragment(片段片段,布尔addToBackStack){
FragmentTransaction交易= getFragmentManager()的BeginTransaction()。
transaction.replace(R.id.container,片段,fragment.getClass()getSimpleName());
如果(addToBackStack){
transaction.addToBackStack(fragment.getClass()getSimpleName());
}
器transaction.commit();
}
}
碎裂
公共类碎裂扩展片段
{
私有String []好友列表;
私人FragmentAListener监听;
@覆盖
公共无效onAttach(活动活动){
super.onAttach(活动);
如果(!(活动的instanceof FragmentAListener)){
抛出新的RuntimeException(活动必须实现FragmentAListener);
}
监听=(FragmentAListener)的活动;
}
@覆盖
公共无效的onCreate(包savedInstanceState){
super.onCreate(savedInstanceState);
setRetainInstance(真正的);
}
@覆盖
公共查看onCreateView(LayoutInflater充气,容器的ViewGroup,捆绑savedInstanceState){
查看查看= inflater.inflate(R.layout.fragmenta,集装箱,假);
TextView中的TextView =(TextView中)view.findViewById(R.id.textView);
ListView控件的ListView =(ListView控件)view.findViewById(R.id.listView);
好友列表= getResources()getStringArray(R.array.FriendsList)。
textView.setText(好友列表[0]);
AdapterClass adapterClass =新AdapterClass(inflater.getContext(),好友列表,监听器);
listView.setAdapter(adapterClass);
listView.setOnItemClickListener(itemClickListener);
返回查看;
}
私人AdapterView.OnItemClickListener itemClickListener =新AdapterView.OnItemClickListener()
{
@覆盖
公共无效onItemClick(适配器视图<>母公司视图中查看,INT位置,长的id){
// TODO您code
}
};
公共接口FragmentAListener
{
无效onListItemButtonClicked(ItemName字符串);
}
}
FragmentB
公共类FragmentB扩展片段
{
公共静态最后弦乐ITEM_NAME_KEY =ITEM_NAME;
@覆盖
公共无效的onCreate(包savedInstanceState){
super.onCreate(savedInstanceState);
setRetainInstance(真正的);
}
@Nullable
@覆盖
公共查看onCreateView(LayoutInflater充气,容器的ViewGroup,捆绑savedInstanceState){
查看查看= inflater.inflate(R.layout.fragmentb,集装箱,假);
// TODO找到你的意见在这里
TextView中的TextView =(TextView中)view.findViewById(R.id.textView);
textView.setText(其FragmentB所选择的项目:+ getArguments()的getString(ITEM_NAME_KEY));
返回查看;
}
}
适配器
公共类AdapterClass扩展ArrayAdapter<字符串>
{
私人LayoutInflater充气;
私人FragmentAListener监听;
公共AdapterClass(上下文的背景下,的String []好友列表,FragmentAListener监听器){
超级(上下文,0,好友列表);
充气= LayoutInflater.from(上下文);
this.listener =侦听器;
}
@覆盖
公共查看getView(最终诠释的立场,观点convertView,ViewGroup中父){
查看查看= convertView;
持有人持有人;
如果(查看== NULL){
鉴于= inflater.inflate(R.layout.list_item,父母,假);
持有人=新的持有人(视图);
view.setTag(保持器);
} 其他 {
支架=(座)view.getTag();
}
ItemName字符串=的getItem(位置);
holder.textView.setText(了itemname);
holder.button.setText(了itemname);
holder.button.setTag(了itemname);
返回查看;
}
私有类持有人
{
私人的TextView TextView的;
私人Button按钮;
公共座(查看行){
TextView的=(的TextView)row.findViewById(R.id.textView);
按钮=(按钮)row.findViewById(R.id.button);
button.setOnClickListener(onClickListener);
}
}
私人OnClickListener onClickListener =新OnClickListener()
{
@覆盖
公共无效的onClick(视图v){
listener.onListItemButtonClicked(v.getTag()的toString());
}
};
}
活动的布局
<的LinearLayout
机器人:ID =@ + ID / mainActivity
的xmlns:机器人=http://schemas.android.com/apk/res/android
的xmlns:工具=http://schemas.android.com/tools
机器人:layout_width =match_parent
机器人:layout_height =match_parent
机器人:paddingBottom会=@扪/ activity_vertical_margin
机器人:以下属性来=@扪/ activity_horizontal_margin
机器人:paddingRight =@扪/ activity_horizontal_margin
机器人:paddingTop =@扪/ activity_vertical_margin
工具:上下文=MainActivity。>
<的FrameLayout
机器人:ID =@ + ID /容器
机器人:layout_width =match_parent
机器人:layout_height =match_parent>
< /的FrameLayout>
< / LinearLayout中>
碎裂布局
<的LinearLayout机器人:ID =@ + ID / linearLayouts
的xmlns:机器人=http://schemas.android.com/apk/res/android
机器人:layout_width =match_parent
机器人:layout_height =match_parent
机器人:方向=垂直>
<的TextView
机器人:ID =@ + ID / TextView的
机器人:layout_width =match_parent
机器人:layout_height =WRAP_CONTENT
机器人:后台=#2233
机器人:文本=这是片段A
机器人:textAppearance =:/>中的Android ATTR / textAppearanceLarge?
<的ListView
机器人:ID =@ + ID / ListView控件
机器人:layout_width =match_parent
机器人:layout_height =WRAP_CONTENT/>
< / LinearLayout中>
FragmentB布局
< LinearLayout中的xmlns:机器人=http://schemas.android.com/apk/res/android
机器人:layout_width =match_parent
机器人:layout_height =match_parent
机器人:方向=垂直>
<的TextView
机器人:ID =@ + ID / TextView的
机器人:layout_width =match_parent
机器人:layout_height =WRAP_CONTENT
机器人:后台=#2233
机器人:文本=这是片段B
机器人:textAppearance =:/>中的Android ATTR / textAppearanceLarge?
<的ListView
机器人:ID =@ + ID / ListView控件
机器人:layout_width =match_parent
机器人:layout_height =WRAP_CONTENT/>
< / LinearLayout中>
列表项目布局
< XML版本=1.0编码=UTF-8&GT?;
<的LinearLayout
机器人:ID =@ + ID / fancy_item_fragment
的xmlns:机器人=http://schemas.android.com/apk/res/android
机器人:layout_width =match_parent
机器人:layout_height =match_parent
机器人:descendantFocusability =blocksDescendants
机器人:方向=横向
机器人:填充=15dp>
<的TextView
机器人:ID =@ + ID / TextView的
机器人:layout_width =match_parent
机器人:layout_height =WRAP_CONTENT
机器人:layout_weight =1
机器人:文本=文本/>
<按钮
机器人:ID =@ + ID /按钮
机器人:layout_width =WRAP_CONTENT
机器人:layout_height =WRAP_CONTENT
机器人:文本=按钮/>
< / LinearLayout中>
My App have one Main Activity which has a Linear Layout and Linear layout is showing one Fragment A having list containing Button and Text View. I want click on a Button of List view of Fragment A then It should Replace fragment A with Fragment B.
Now I am able to Click on the Button of list view of Fragment A but(it is not showing Fragment B) it is showing Android not responding. I have done Debug and I am Getting error at committing of transaction for Fragment B. other piece of Code is Working Fine.
Please help me out why I am getting this error Full code is below
Main Activity Code
public class MainActivity extends Activity {
FrameLayout frameLayout = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.d("Async","On Create");
frameLayout = (FrameLayout) findViewById(R.id.fragment_Container);
InstallFragmetA();
}
protected void InstallFragmetA()
{
FragmentA fragmentA = new FragmentA();
FragmentManager manager= getFragmentManager();
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.add(R.id.fragment_Container,fragmentA,"A");
transaction.commit();
}
protected void InstallFragmetB()
{
FragmentB fragmentB = new FragmentB();
FragmentManager manager= getFragmentManager();
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.add(R.id.fragment_Container,fragmentB,"B");
transaction.commit();
}
protected void RemoveFragmetA()
{
Log.d("Async","In Remove Fragment A");
FragmentB fragmentB = new FragmentB();
Log.d("Async","Fragment b initializeed");
// FragmentManager manager= getFragmentManager();
FragmentTransaction transaction = getFragmentManager().beginTransaction();
Log.d("Async","Begin fragment transaction");
FragmentA fragmentA = (FragmentA) getFragmentManager().findFragmentByTag("A");
// fragmentA.onDestroy();
// fragmentA.onDestroyView();
transaction.replace(R.id.fragment_Container, fragmentB, "B");
Log.d("Async", "Fragment A replaced");
// transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
Log.d("Async","Fragment Failed");
// transaction.addToBackStack(null);
transaction.commit();
Log.d("Async","Transaction Commit");
}
Fragment A Code
public class FragmentA extends Fragment {
MainActivity mainActivity= null;
TextView textView=null;
String[] friendList= null;
public FragmentA()
{
mainActivity = new MainActivity();
}
//Activity activity= null;
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
// this.activity = activity;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d("Async","On Create");
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
Log.d("Async","On Create view");
return inflater.inflate(R.layout.fragmenta,container,false);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
textView = (TextView) getActivity().findViewById(R.id.textView);
ListView list = (ListView) getActivity().findViewById(R.id.listView);
Log.d("Async","Array is "+getResources().getStringArray(R.array.FriendsList));
friendList = getResources().getStringArray(R.array.FriendsList);
Log.d("Async","Array is "+friendList[0]);
textView.setText(friendList[0]);
// ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(getActivity(),R.array.FriendsList,R.layout.text);
AdapterClass adapterClass = new AdapterClass(getActivity(),friendList,mainActivity);
list.setAdapter(adapterClass);
list.setItemsCanFocus(true);
list.setFocusable(true);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Log.d("Async","A");
Toast.makeText(getActivity(),"Hello "+position,Toast.LENGTH_LONG).show();
}
});
Log.d("Async","On Activity Created");
}
}
Adapter Class Which I am Using for Fragment A
public class AdapterClass extends ArrayAdapter {
Button btn;
int counter=0;
Context c=null;
String[] friendList= null;
LayoutInflater l;
MainActivity mainActivity = null;
public AdapterClass(Context c, String[] friendList, MainActivity mainActivity) {
super(c,R.layout.a,R.id.textView3,friendList);
l = (LayoutInflater) c.getSystemService(c.LAYOUT_INFLATER_SERVICE);
Log.d("Async","counter is ");
this.c=c;
this.friendList = friendList;
this.mainActivity = mainActivity;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
Log.d("Async","getView is "+position);
Log.d("Async","counter is "+counter);
View row = convertView;
Myholder holder = null;
if(row == null)
{
Log.d("Async","Row is Null");
row = l.inflate(R.layout.a, parent,false);
holder = new Myholder(row);
row.setTag(holder);
Log.d("Async","Row Set tag");
}
else
{
Log.d("Async","Row is not null");
holder = (Myholder) row.getTag();
Log.d("Async","Holder not tag");
}
holder.btn.setText(friendList[position]);
holder.text.setText(friendList[position]);
holder.btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d("Async","Button Clicked "+friendList[position]);
Toast.makeText(c,"Button clicked "+friendList[position],Toast.LENGTH_LONG).show();
mainActivity.RemoveFragmetA();
}
});
return row;
}
}
Fragment B Code
public class FragmentB extends Fragment {
public void onAttach(Activity activity) {
super.onAttach(activity);
// this.activity = activity;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d("Async", " Fragment B On Create");
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
Log.d("Async"," Fragment B On Create view");
return inflater.inflate(R.layout.fragmentb,container,false);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
}
activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:id="@+id/mainActivity"
android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">
<FrameLayout
android:layout_width="fill_parent"
android:id="@+id/fragment_Container"
android:layout_height="fill_parent"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"></FrameLayout>
fragmenta.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:id="@+id/linearLayouts"
android:layout_height="match_parent">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#2233"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Small Text"
android:id="@+id/textView" />
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/listView" />
fragmentb.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#2233"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Small Text"
android:id="@+id/textView" />
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/listView1" />
I am getting bellow Error.
E/AndroidRuntime(1021): java.lang.IllegalStateException: Activity has been destroyed
E/AndroidRuntime(1021): at android.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1333)
E/AndroidRuntime(1021): at android.app.BackStackRecord.commitInternal(BackStackRecord.java:595)
E/AndroidRuntime(1021): at android.app.BackStackRecord.commit(BackStackRecord.java:574)
E/AndroidRuntime(1021): at com.example.bathla.lab5_asynctasklabtest.MainActivity.InstallFragmetB(MainActivity.java:38)
E/AndroidRuntime(1021): at com.example.bathla.lab5_asynctasklabtest.AdapterClass$1.onClick(AdapterClass.java:64)
E/AndroidRuntime(1021): at android.view.View.performClick(View.java:4240)
E/AndroidRuntime(1021): at android.view.View$PerformClick.run(View.java:17721)
E/AndroidRuntime(1021): at android.os.Handler.handleCallback(Handler.java:730)
E/AndroidRuntime(1021): at android.os.Handler.dispatchMessage(Handler.java:92)
E/AndroidRuntime(1021): at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime(1021): at android.app.ActivityThread.main(ActivityThread.java:5103)
E/AndroidRuntime(1021): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(1021): at java.lang.reflect.Method.invoke(Method.java:525)
E/AndroidRuntime(1021): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
E/AndroidRuntime(1021): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
E/AndroidRuntime(1021): at dalvik.system.NativeStart.main(Native Method)
解决方案
MainActivity
public class MainActivity extends Activity implements FragmentAListener
{
private FragmentA fragmentA;
private FragmentB fragmentB;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
fragmentA = (FragmentA) getFragmentManager().findFragmentByTag(FragmentA.class.getSimpleName());
if (savedInstanceState == null) {
fragmentA = new FragmentA();
replaceToFragment(fragmentA, false);
}
}
@Override
public void onListItemButtonClicked(String itemName) {
fragmentB = new FragmentB();
Bundle bundle = new Bundle();
bundle.putString(FragmentB.ITEM_NAME_KEY, itemName);
fragmentB.setArguments(bundle);
replaceToFragment(fragmentB, true);
}
public void replaceToFragment(Fragment fragment, boolean addToBackStack) {
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.replace(R.id.container, fragment, fragment.getClass().getSimpleName());
if (addToBackStack) {
transaction.addToBackStack(fragment.getClass().getSimpleName());
}
transaction.commit();
}
}
FragmentA
public class FragmentA extends Fragment
{
private String[] friendList;
private FragmentAListener listener;
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
if (!(activity instanceof FragmentAListener)) {
throw new RuntimeException("Activity must implements FragmentAListener");
}
listener = (FragmentAListener) activity;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragmenta, container, false);
TextView textView = (TextView) view.findViewById(R.id.textView);
ListView listView = (ListView) view.findViewById(R.id.listView);
friendList = getResources().getStringArray(R.array.FriendsList);
textView.setText(friendList[0]);
AdapterClass adapterClass = new AdapterClass(inflater.getContext(), friendList, listener);
listView.setAdapter(adapterClass);
listView.setOnItemClickListener(itemClickListener);
return view;
}
private AdapterView.OnItemClickListener itemClickListener = new AdapterView.OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//TODO your code
}
};
public interface FragmentAListener
{
void onListItemButtonClicked(String itemName);
}
}
FragmentB
public class FragmentB extends Fragment
{
public static final String ITEM_NAME_KEY = "item_name";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragmentb, container, false);
//TODO find your views here
TextView textView = (TextView) view.findViewById(R.id.textView);
textView.setText("Its FragmentB. Selected item: " + getArguments().getString(ITEM_NAME_KEY));
return view;
}
}
Adapter
public class AdapterClass extends ArrayAdapter<String>
{
private LayoutInflater inflater;
private FragmentAListener listener;
public AdapterClass(Context context, String[] friendList, FragmentAListener listener) {
super(context, 0, friendList);
inflater = LayoutInflater.from(context);
this.listener = listener;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
View view = convertView;
Holder holder;
if (view == null) {
view = inflater.inflate(R.layout.list_item, parent, false);
holder = new Holder(view);
view.setTag(holder);
} else {
holder = (Holder) view.getTag();
}
String itemName = getItem(position);
holder.textView.setText(itemName);
holder.button.setText(itemName);
holder.button.setTag(itemName);
return view;
}
private class Holder
{
private TextView textView;
private Button button;
public Holder(View row) {
textView = (TextView) row.findViewById(R.id.textView);
button = (Button) row.findViewById(R.id.button);
button.setOnClickListener(onClickListener);
}
}
private OnClickListener onClickListener = new OnClickListener()
{
@Override
public void onClick(View v) {
listener.onListItemButtonClicked(v.getTag().toString());
}
};
}
Activity layout
<LinearLayout
android:id="@+id/mainActivity"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity">
<FrameLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent">
</FrameLayout>
</LinearLayout>
FragmentA layout
<LinearLayout android:id="@+id/linearLayouts"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#2233"
android:text="This is Fragment A"
android:textAppearance="?android:attr/textAppearanceLarge"/>
<ListView
android:id="@+id/listView"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
FragmentB Layout
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#2233"
android:text="This is Fragment B"
android:textAppearance="?android:attr/textAppearanceLarge"/>
<ListView
android:id="@+id/listView"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
List Item Layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:id="@+id/fancy_item_fragment"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:descendantFocusability="blocksDescendants"
android:orientation="horizontal"
android:padding="15dp">
<TextView
android:id="@+id/textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Text"/>
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"/>
</LinearLayout>