在同一活动2片段之间发送的ArrayList [英] Sending ArrayList between 2 fragments on same Activity
本文介绍了在同一活动2片段之间发送的ArrayList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
我有2个片段和一个活动。
片段1有一个ListView和一些按钮等相对布局，
片段2具有ListView和在底部的按钮。片段2的列表视图是一个列表视图，您可以选择多个项目，当选择一个项目，它被添加到一个ArrayList（我们称为选中），或删除，如果取消，我想通过发送此ArrayList到片段1，在那里可以在（如果它们存在以及它的其他项目）添加到其自己的列表视图。我已存储在活动选定的ArrayList
活动具有以下code
公共类AddExerciseActivity扩展AppCompatActivity实现ActionBar.TabListener {/ **
*本{@link android.support.v4.view.PagerAdapter}，将提供
*对于每个部分的片段。我们使用
* {@link FragmentPagerAdapter}衍生，这将让每一个
*加载到内存中的片段。如果这成为太内存密集型，它
*可能是最好切换到
* {@link android.support.v4.app.FragmentStatePagerAdapter}。
* /
SectionsPagerAdapter mSectionsPagerAdapter;/ **
*本{@link ViewPager}将承载部分内容。
* /
ViewPager mViewPager;
静态的ArrayList＆LT;集＆gt;套=新的ArrayList＆LT;＆GT;（）;字符串名称，日期;
@覆盖
保护无效的onCreate（捆绑savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.activity_fragment）;
捆绑额外= getIntent（）getExtras（）。
如果（临时演员！= NULL）{
名称= extras.getString（ExerciseName）;
日期= extras.getString（日期）;
} //设置操作栏。
最后的动作条动作条= getSupportActionBar（）;
actionBar.setNavigationMode（ActionBar.NAVIGATION_MODE_TABS）;
actionBar.setTitle（名）; //创建将返回一个片段为三个的适配器
//活性的主要部分。
mSectionsPagerAdapter =新SectionsPagerAdapter（getSupportFragmentManager（））; //设置的ViewPager与部分适配器。
mViewPager =（ViewPager）findViewById（R.id.pager）;
mViewPager.setAdapter（mSectionsPagerAdapter）; //当不同部分之间滑动，选择对应的
// 标签。我们也可以使用ActionBar.Tab＃select（）来做到这一点，如果我们有
//为Tab的参考。
mViewPager.setOnPageChangeListener（新ViewPager.SimpleOnPageChangeListener（）{
@覆盖
公共无效使用onPageSelected（INT位置）{
actionBar.setSelectedNavigationItem（位置）;
}
}）; //对于每一个应用中的部分，添加标签，操作栏。
的for（int i = 0; I＆LT; mSectionsPagerAdapter.getCount（）;我++）{
//创建对应于定义的页面标题文字标签
//适配器。同时，指定此活动的对象，它实现
//将TabListener接口，回调（监听程序）进行时
//这个选项卡中选择。
actionBar.addTab（
actionBar.newTab（）
.setText（mSectionsPagerAdapter.getPageTitle（I））
.setTabListener（本））;
}
}@覆盖
公共无效onTabSelected（ActionBar.Tab选项卡，FragmentTransaction fragmentTransaction）{
//当选择给定的标签上，切换到相应的页面
//的ViewPager。
mViewPager.setCurrentItem（tab.getPosition（））;
}@覆盖
公共无效onTabUnselected（ActionBar.Tab选项卡，FragmentTransaction fragmentTransaction）{
}@覆盖
公共无效onTabReselected（ActionBar.Tab选项卡，FragmentTransaction fragmentTransaction）{
}
/ **
* A {@link FragmentPagerAdapter}返回对应片段
*章节/标签/页面。
* /
公共类SectionsPagerAdapter扩展FragmentPagerAdapter { 公共SectionsPagerAdapter（FragmentManager FM）{
超（FM）;
} @覆盖
公共片段的getItem（INT位置）{
//的getItem被称为实例化片段为给定的页面。
//返回一个PlaceholderFragment（定义如下静态内部类）。
开关（位置）{
情况下0：
束束=新包（）;
bundle.putString（日，日期）;
bundle.putInt（位置，位置）;
返回新FirstFragment（）;
情况1：
返回新SecondFragment（）;
}
返回null;
} @覆盖
公众诠释的getCount（）{
//显示3总页数。
返回2;
} @覆盖
公共CharSequence的getPageTitle（INT位置）{
开关（位置）{
情况下0：
返回跟踪;
情况1：
回到历史;
}
返回null;
}
}公众的ArrayList＆LT;集＆gt; getSets（）{
返回套;
}公共无效setSets（ArrayList的＆LT;集＆gt;套）{
this.sets =套;
}
}
下面是片段1
公共类FirstFragment扩展android.support.v4.app.Fragment {CardDatabaseAdapter2 mCardDatabaseAdapter2;TextView的workoutName;
重量的EditText，代表;
双weightCount;
INT repsCount;
ListView控件列表;
按钮加，PLUS2，减，minus2，更新;
字符串名称，日期;
INT类型，类别，计数;
运动前;
卡牌;
查看rootView;
ArrayList的＆LT;集＆gt;阵列=新的ArrayList＆LT;＆GT;（）;
私人AddExerciseAdapter mAddExerciseAdapter;
@覆盖
公共查看onCreateView（LayoutInflater充气器，容器的ViewGroup，捆绑savedInstanceState）{
rootView = inflater.inflate（R.layout.add_exercise_view，集装箱，FALSE）;
setHasOptionsMenu（真）;
捆绑额外= getActivity（）getIntent（）getExtras（）。
如果（临时演员！= NULL）{
名称= extras.getString（ExerciseName）;
类型= extras.getInt（ExerciseType）;
类别= extras.getInt（ExerciseCategory）;
日期= extras.getString（日期）;
Log.v（日，日期）;
}
mCardDatabaseAdapter2 =新CardDatabaseAdapter2（getActivity（））; Log.v（创造，项创建）; //mCardDatabaseAdapter2.insert(name，日期）;
卡=新卡（0，姓名，日期）;
Log.v（名称和放大器;日期名++日期）; EX =新的练习（名称，类型，类别）;
Log.v（锻炼收到ex.toString（））;
workoutName =（TextView中）rootView.findViewById（R.id.name）;
体重=（EditText上）rootView.findViewById（R.id.textWeight）;
代表=（EditText上）rootView.findViewById（R.id.textRep）;
名单=（ListView控件）rootView.findViewById（R.id.rowReps）;
加上=（按钮）rootView.findViewById（R.id.plus）;
减去=（按钮）rootView.findViewById（R.id.minus）;
PLUS2 =（按钮）rootView.findViewById（R.id.plus2）;
minus2 =（按钮）rootView.findViewById（R.id.minus2）;
更新=（按钮）rootView.findViewById（R.id.update）; weightCount = 0;
repsCount = 0;
数= 1; 阵列=新的ArrayList＆LT;＆GT;（）;
plus.setOnClickListener（新View.OnClickListener（）{
@覆盖
公共无效的onClick（视图v）{
如果（！weight.getText（）。的toString（）。等于（））{
weightCount = Double.parseDouble（weight.getText（）的toString（））;
weightCount = weightCount + 2.5;
weight.setText（将String.valueOf（weightCount））;
}其他{
weight.setText（将String.valueOf（2.5））;
}
}
}）; minus.setOnClickListener（新View.OnClickListener（）{
@覆盖
公共无效的onClick（视图v）{
如果（weightCount＆下; = 0.0 || weight.getText（）的toString（）等于（）。）{
weight.setText（将String.valueOf（0.0））;
}其他{
weightCount = Double.parseDouble（weight.getText（）的toString（））;
weightCount = weightCount - 2.5;
weight.setText（将String.valueOf（weightCount））;
}
}
}）; plus2.setOnClickListener（新View.OnClickListener（）{
@覆盖
公共无效的onClick（视图v）{
如果（！reps.getText（）。的toString（）。等于（））{
repsCount =的Integer.parseInt（reps.getText（）的toString（））;
repsCount = repsCount + 1;
reps.setText（将String.valueOf（repsCount））;
}其他{
reps.setText（将String.valueOf（0））;
}
}
}）; minus2.setOnClickListener（新View.OnClickListener（）{
@覆盖
公共无效的onClick（视图v）{
如果（repsCount＆下; = 0 || reps.getText（）的toString（）等于（）。）{
reps.setText（将String.valueOf（0））;
}其他{
repsCount =的Integer.parseInt（reps.getText（）的toString（））;
repsCount = repsCount - 1;
reps.setText（将String.valueOf（repsCount））;
}
}
}）; update.setOnClickListener（新View.OnClickListener（）{
@覆盖
公共无效的onClick（视图v）{ 如果（weight.getText（）。的toString（）。等于（）|| weight.getText（）。的toString（）。等于（将String.valueOf（0.0）））{
weight.setText（将String.valueOf（0.0））;
Toast.makeText（getActivity（），您需要输入一个重！，Toast.LENGTH_SHORT）.show（）;
}
否则如果（reps.getText（）。的toString（）。等于（）|| reps.getText（）。的toString（）。等于（将String.valueOf（0）））{
reps.setText（将String.valueOf（0））;
Toast.makeText（getActivity（），你需要至少有1名代表！，Toast.LENGTH_SHORT）.show（）;
}其他{
双TEMP2 = Double.parseDouble（weight.getText（）的toString（））;
INT TEMP3 =的Integer.parseInt（reps.getText（）的toString（））;
集合S =新集（姓名，TEMP2，TEMP3，日期）;
array.add（多个）;
//mCardDatabaseAdapter2.insert2（mCardDatabaseAdapter2.highestID（），名称，s.getWeight（），s.getReps（），日期）;
//Log.v(\"inserted数据，ID+ mCardDatabaseAdapter2.highestID（）+姓名+姓名+权重+ s.getWeight（）+代表+ s.getReps（）+日期 +日期）;
//Log.v(\"id，mCardDatabaseAdapter2.highestID（）+）;
mAddExerciseAdapter.notifyDataSetChanged（）;
算上++;
}
}
}）;
mAddExerciseAdapter =新AddExerciseAdapter（getActivity（），R.layout.row2，数组）;
list.setAdapter（mAddExerciseAdapter）; mAddExerciseAdapter.notifyDataSetChanged（）; 返回rootView;}@覆盖
公共无效onCreateOptionsMenu（菜单菜单，MenuInflater气筒）{
inflater.inflate（R.menu.menu_add_exercise，菜单）;
}@覆盖
公共布尔onOptionsItemSelected（菜单项项）{
//处理动作栏项目点击这里。操作栏会
//自动处理上点击主页/向上按钮，只要
//你在AndroidManifest.xml中指定一个父活动。
INT ID = item.getItemId（）; 如果（ID == R.id.action_done）{
意向意图=新意图（getActivity（），MainMenuActivity.class）;
如果（！array.isEmpty（））{
mCardDatabaseAdapter2.insert（姓名，日期）;
对于（集S：数组）{
mCardDatabaseAdapter2.insert2（mCardDatabaseAdapter2.highestID（），名称，s.getWeight（），s.getReps（），日期）;
}
mCardDatabaseAdapter2.resetID（）;
}
startActivity（意向）;
} 返回super.onOptionsItemSelected（项目）;
}
@覆盖
公共无效的onPause（）{
super.onPause（）;
}@覆盖
公共无效的onStop（）{
super.onStop（）;
}@覆盖
公共无效onResume（）{
super.onResume（）;
ArrayList的＆LT;集＆gt; S =（（AddExerciseActivity）getActivity（））getSets（）;
如果（！s.isEmpty（））{
对于（设置T：S）{
array.add（T）;
mAddExerciseAdapter.notifyDataSetChanged（）;
}
}
}
}
和这里是片段2
公共类SecondFragment扩展片段{CardDatabaseAdapter2 mCardDatabaseAdapter;
ExerciseHistoryAdapter mExerciseHistoryAdapter;
AddExerciseActivity mAddExerciseActivity;
ArrayList的＆LT;集＆gt;套=新的ArrayList＆LT;＆GT;（）;
ArrayList的＆LT;集＆gt;选择=新的ArrayList＆LT;＆GT;（）;
字符串名称;
LV的ListView;
卡C;
INT X;@覆盖
公共查看onCreateView（LayoutInflater充气器，容器的ViewGroup，捆绑savedInstanceState）{
查看rootView = inflater.inflate（R.layout.exercise_history，集装箱，FALSE）;
捆绑额外= getActivity（）getIntent（）getExtras（）。
如果（临时演员！= NULL）{
名称= extras.getString（ExerciseName）;
}
mAddExerciseActivity =新AddExerciseActivity（）;
mCardDatabaseAdapter =新CardDatabaseAdapter2（getActivity（））;
套= mCardDatabaseAdapter.getAllSetsWithName（名）;
Log.v（阵列，sets.toString（））; LV =（ListView控件）rootView.findViewById（R.id.history_list）;
lv.setChoiceMode（ListView.CHOICE_MODE_MULTIPLE）;
lv.setOnItemClickListener（新AdapterView.OnItemClickListener（）{
@覆盖
公共无效onItemClick（适配器视图＆LT;＆GT;母公司，观景，INT位置，长的id）{
如果（！selected.contains（sets.get（位置）））{
lv.setItemChecked（位置，真正的）;
view.setBackgroundColor（Color.rgb（255，152，0））;
Toast.makeText（getActivity（），项目选择Toast.LENGTH_SHORT）.show（）;
selected.add（sets.get（位置））;
}其他{
lv.setItemChecked（位置，FALSE）;
view.setBackgroundColor（Color.rgb（221，221，221））;
selected.remove（sets.get（位置））;
Toast.makeText（getActivity（），项目未选定，Toast.LENGTH_SHORT）.show（）;
}
}
}）; 按钮添加=（按钮）rootView.findViewById（R.id.add_button）;
add.setOnClickListener（新View.OnClickListener（）{
@覆盖
公共无效的onClick（视图v）{
（（AddExerciseActivity）getActivity（））setSets（选择）。 Toast.makeText（getActivity（），项目已成功添加，Toast.LENGTH_SHORT）.show（）;
}
}）; mExerciseHistoryAdapter =新ExerciseHistoryAdapter（getActivity（），R.layout.history_listview_item，套，LV）;
lv.setAdapter（mExerciseHistoryAdapter）; 返回rootView;
}
}
编辑：我尝试在那里，我获得/设置数组列表。但它不工作，为已经创建的片段。
编辑2：
20 04-23：18：48.034 598-598 / com.company.joeliomason.projectmeE / InputEventReceiver：Exceptiondispatching输入事件。
04-23 20：18：48.034 598-598 / com.company.joeliomason.projectme
E /的MessageQueue-JNI：在异常回调的MessageQueue：
handleReceiveCallback
04-23 20：18：48.034 598-598 / com.company.joeliomason.projectme
E /的MessageQueue-JNI：java.lang.IllegalStateException：已经片段
活性
在android.support.v4.app.Fragment.setArguments（Fragment.java:549）
在com.company.joeliomason.projectme.Views.FirstFragment.setArguments（FirstFragment.java:200）
在com.company.joeliomason.projectme.Views.AddExerciseActivity.onTabSelected(AddExerciseActivity.java:94)
在android.support.v7.internal.app.WindowDecorActionBar.selectTab（WindowDecorActionBar.java:640）
在android.support.v7.internal.app.WindowDecorActionBar.setSelectedNavigationItem(WindowDecorActionBar.java:414)
在com.company.joeliomason.projectme.Views.AddExerciseActivity$1.onPageSelected(AddExerciseActivity.java:68)
解决方案
这可能会奏效，但我没有测试它。
它看起来像你可以传递一个捆绑使用在 onTabSelected（）方法的新方法调用。
创建为 FirstFragment 的引用作为一个实例变量 AddExerciseActivity ：
ViewPager mViewPager;
静态的ArrayList＆LT;集＆gt;套=新的ArrayList＆LT;＆GT;（）;
FirstFragment fragmentFirst; //添加
设置它在你的 SectionsPagerAdapter ：
@覆盖
公共片段的getItem（INT位置）{
//的getItem被称为实例化片段为给定的页面。
//返回一个PlaceholderFragment（定义如下静态内部类）。
开关（位置）{
情况下0：
束束=新包（）;
bundle.putString（日，日期）;
bundle.putInt（位置，位置）;
fragmentFirst =新FirstFragment（）; //改性
返回fragmentFirst; //添加
情况1：
返回新SecondFragment（）;
}
返回null;
}
然后，添加，添加集到捆绑，并将其传递到 FirstFragment 在 onTabSelected ：
@覆盖
公共无效onTabSelected（ActionBar.Tab选项卡，FragmentTransaction fragmentTransaction）{
//当选择给定的标签上，切换到相应的页面
//的ViewPager。
mViewPager.setCurrentItem（tab.getPosition（））; 如果（fragmentFirst！= NULL）{
束束=新包（）;
bundle.putSerializable（套套）;
//fragmentFirst.setArguments(bundle）; //不工作
fragmentFirst.updateArguments（包）; //尝试这个
}}
编辑：在添加一个新的公共方法 FragmentFirst ：
公共无效updateArguments（捆绑参数）{
ArrayList的＆LT;集＆gt; X =新的ArrayList＆LT;＆GT;（）;
X =（ArrayList的＆LT;集＆gt;）args.getSerializable（套）;
对于（集合P：X）{
array.add（P）;
}
mAddExerciseAdapter.notifyDataSetChanged（）;
}
I have 2 Fragments and an Activity. Fragment 1 has a relative layout with a listview and some buttons etc, Fragment 2 has a ListView and a button at the bottom. fragment 2's listview is a listview where you can select multiple items, when an item is selected, it is added to an arraylist (we will call this selected) or removed if deselected, I want to send this arrayList over to Fragment 1, where it can add it to its own listview (as well as its other items if they exist). I have the selected ArrayList stored in Activity.
Activity has the following code
public class AddExerciseActivity extends AppCompatActivity implements ActionBar.TabListener {
/**
* The {@link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a
* {@link FragmentPagerAdapter} derivative, which will keep every
* loaded fragment in memory. If this becomes too memory intensive, it
* may be best to switch to a
* {@link android.support.v4.app.FragmentStatePagerAdapter}.
*/
SectionsPagerAdapter mSectionsPagerAdapter;
/**
* The {@link ViewPager} that will host the section contents.
*/
ViewPager mViewPager;
static ArrayList<Set> sets = new ArrayList<>();
String name, date;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_fragment);
Bundle extras = getIntent().getExtras();
if (extras != null) {
name = extras.getString("ExerciseName");
date = extras.getString("date");
}
// Set up the action bar.
final ActionBar actionBar = getSupportActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
actionBar.setTitle(name);
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
// When swiping between different sections, select the corresponding
// tab. We can also use ActionBar.Tab#select() to do this if we have
// a reference to the Tab.
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
@Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
});
// For each of the sections in the app, add a tab to the action bar.
for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
// Create a tab with text corresponding to the page title defined by
// the adapter. Also specify this Activity object, which implements
// the TabListener interface, as the callback (listener) for when
// this tab is selected.
actionBar.addTab(
actionBar.newTab()
.setText(mSectionsPagerAdapter.getPageTitle(i))
.setTabListener(this));
}
}
@Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
// When the given tab is selected, switch to the corresponding page in
// the ViewPager.
mViewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
@Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
/**
* A {@link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
switch (position) {
case 0:
Bundle bundle = new Bundle();
bundle.putString("date", date);
bundle.putInt("position", position);
return new FirstFragment();
case 1:
return new SecondFragment();
}
return null;
}
@Override
public int getCount() {
// Show 3 total pages.
return 2;
}
@Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "Track";
case 1:
return "History";
}
return null;
}
}
public ArrayList<Set> getSets() {
return sets;
}
public void setSets(ArrayList<Set> sets) {
this.sets = sets;
}
}
Here is Fragment 1
public class FirstFragment extends android.support.v4.app.Fragment {
CardDatabaseAdapter2 mCardDatabaseAdapter2;
TextView workoutName;
EditText weight, reps;
double weightCount;
int repsCount;
ListView list;
Button plus, plus2, minus, minus2, update;
String name, date;
int type, category, count;
Exercise ex;
Card card;
View rootView;
ArrayList<Set> array = new ArrayList<>();
private AddExerciseAdapter mAddExerciseAdapter;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.add_exercise_view, container, false);
setHasOptionsMenu(true);
Bundle extras = getActivity().getIntent().getExtras();
if (extras != null) {
name = extras.getString("ExerciseName");
type = extras.getInt("ExerciseType");
category = extras.getInt("ExerciseCategory");
date = extras.getString("date");
Log.v("date", date);
}
mCardDatabaseAdapter2 = new CardDatabaseAdapter2(getActivity());
Log.v("created", "item created");
//mCardDatabaseAdapter2.insert(name, date);
card = new Card(0, name, date);
Log.v("name & date", name + " " + date);
ex = new Exercise(name, type, category);
Log.v("Exercise Recieved", ex.toString());
workoutName = (TextView) rootView.findViewById(R.id.name);
weight = (EditText) rootView.findViewById(R.id.textWeight);
reps = (EditText) rootView.findViewById(R.id.textRep);
list = (ListView) rootView.findViewById(R.id.rowReps);
plus = (Button) rootView.findViewById(R.id.plus);
minus = (Button) rootView.findViewById(R.id.minus);
plus2 = (Button) rootView.findViewById(R.id.plus2);
minus2 = (Button) rootView.findViewById(R.id.minus2);
update = (Button) rootView.findViewById(R.id.update);
weightCount = 0;
repsCount = 0;
count = 1;
array = new ArrayList<>();
plus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (!weight.getText().toString().equals("")) {
weightCount = Double.parseDouble(weight.getText().toString());
weightCount = weightCount + 2.5;
weight.setText(String.valueOf(weightCount));
} else {
weight.setText(String.valueOf(2.5));
}
}
});
minus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(weightCount <= 0.0 || weight.getText().toString().equals("")) {
weight.setText(String.valueOf(0.0));
} else {
weightCount = Double.parseDouble(weight.getText().toString());
weightCount = weightCount - 2.5;
weight.setText(String.valueOf(weightCount));
}
}
});
plus2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (!reps.getText().toString().equals("")) {
repsCount = Integer.parseInt(reps.getText().toString());
repsCount = repsCount + 1;
reps.setText(String.valueOf(repsCount));
} else {
reps.setText(String.valueOf(0));
}
}
});
minus2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(repsCount <= 0 || reps.getText().toString().equals("")){
reps.setText(String.valueOf(0));
} else {
repsCount = Integer.parseInt(reps.getText().toString());
repsCount = repsCount - 1;
reps.setText(String.valueOf(repsCount));
}
}
});
update.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(weight.getText().toString().equals("") || weight.getText().toString().equals(String.valueOf(0.0))) {
weight.setText(String.valueOf(0.0));
Toast.makeText(getActivity(), "You need to enter a weight!", Toast.LENGTH_SHORT).show();
}
else if(reps.getText().toString().equals("")|| reps.getText().toString().equals(String.valueOf(0))) {
reps.setText(String.valueOf(0));
Toast.makeText(getActivity(), "You need to have at least 1 rep!", Toast.LENGTH_SHORT).show();
} else {
double temp2 = Double.parseDouble(weight.getText().toString());
int temp3 = Integer.parseInt(reps.getText().toString());
Set s = new Set(name, temp2, temp3, date);
array.add(s);
//mCardDatabaseAdapter2.insert2(mCardDatabaseAdapter2.highestID(), name, s.getWeight(), s.getReps(), date);
//Log.v("inserted data", "id " + mCardDatabaseAdapter2.highestID() + " name " + name + " weight " + s.getWeight() + " reps " + s.getReps() + " date " + date);
//Log.v("id", mCardDatabaseAdapter2.highestID() + "");
mAddExerciseAdapter.notifyDataSetChanged();
count++;
}
}
});
mAddExerciseAdapter = new AddExerciseAdapter(getActivity(), R.layout.row2, array);
list.setAdapter(mAddExerciseAdapter);
mAddExerciseAdapter.notifyDataSetChanged();
return rootView;
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.menu_add_exercise, menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_done) {
Intent intent = new Intent(getActivity(), MainMenuActivity.class);
if(!array.isEmpty()) {
mCardDatabaseAdapter2.insert(name, date);
for (Set s : array) {
mCardDatabaseAdapter2.insert2(mCardDatabaseAdapter2.highestID(), name, s.getWeight(), s.getReps(), date);
}
mCardDatabaseAdapter2.resetID();
}
startActivity(intent);
}
return super.onOptionsItemSelected(item);
}
@Override
public void onPause() {
super.onPause();
}
@Override
public void onStop() {
super.onStop();
}
@Override
public void onResume() {
super.onResume();
ArrayList<Set> s = ((AddExerciseActivity)getActivity()).getSets();
if(!s.isEmpty()) {
for(Set t : s) {
array.add(t);
mAddExerciseAdapter.notifyDataSetChanged();
}
}
}
}
and here is Fragment 2
public class SecondFragment extends Fragment {
CardDatabaseAdapter2 mCardDatabaseAdapter;
ExerciseHistoryAdapter mExerciseHistoryAdapter;
AddExerciseActivity mAddExerciseActivity;
ArrayList<Set> sets = new ArrayList<>();
ArrayList<Set> selected = new ArrayList<>();
String name;
ListView lv;
Card c;
int x;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.exercise_history, container, false);
Bundle extras = getActivity().getIntent().getExtras();
if (extras != null) {
name = extras.getString("ExerciseName");
}
mAddExerciseActivity = new AddExerciseActivity();
mCardDatabaseAdapter = new CardDatabaseAdapter2(getActivity());
sets = mCardDatabaseAdapter.getAllSetsWithName(name);
Log.v("array", sets.toString());
lv = (ListView) rootView.findViewById(R.id.history_list);
lv.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if (!selected.contains(sets.get(position))) {
lv.setItemChecked(position, true);
view.setBackgroundColor(Color.rgb(255, 152, 0));
Toast.makeText(getActivity(), "Item Selected", Toast.LENGTH_SHORT).show();
selected.add(sets.get(position));
} else {
lv.setItemChecked(position, false);
view.setBackgroundColor(Color.rgb(221, 221, 221));
selected.remove(sets.get(position));
Toast.makeText(getActivity(), "Item Unselected", Toast.LENGTH_SHORT).show();
}
}
});
Button add = (Button) rootView.findViewById(R.id.add_button);
add.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
((AddExerciseActivity)getActivity()).setSets(selected);
Toast.makeText(getActivity(), "items have been added successfully", Toast.LENGTH_SHORT).show();
}
});
mExerciseHistoryAdapter= new ExerciseHistoryAdapter(getActivity(), R.layout.history_listview_item, sets, lv);
lv.setAdapter(mExerciseHistoryAdapter);
return rootView;
}
}
EDIT: my attempt is in there, where I get/set the arrayList. but it doesnt work as the fragment is already created.
EDIT 2:
04-23 20:18:48.034 598-598/com.company.joeliomason.projectmeE/InputEventReceiver﹕ Exceptiondispatching input event.
04-23 20:18:48.034 598-598/com.company.joeliomason.projectme
E/MessageQueue-JNI﹕ Exception in MessageQueue callback:
handleReceiveCallback
04-23 20:18:48.034 598-598/com.company.joeliomason.projectme
E/MessageQueue-JNI﹕ java.lang.IllegalStateException: Fragment already
active
at android.support.v4.app.Fragment.setArguments(Fragment.java:549)
at com.company.joeliomason.projectme.Views.FirstFragment.setArguments(FirstFragment.java:200)
at com.company.joeliomason.projectme.Views.AddExerciseActivity.onTabSelected(AddExerciseActivity.java:94)
at android.support.v7.internal.app.WindowDecorActionBar.selectTab(WindowDecorActionBar.java:640)
at android.support.v7.internal.app.WindowDecorActionBar.setSelectedNavigationItem(WindowDecorActionBar.java:414)
at com.company.joeliomason.projectme.Views.AddExerciseActivity$1.onPageSelected(AddExerciseActivity.java:68)
解决方案
This might work, but I haven't tested it.
It looks like you could pass a Bundle using a new method call in your onTabSelected() method.
Create a reference to FirstFragment as an instance variable in AddExerciseActivity:
ViewPager mViewPager;
static ArrayList<Set> sets = new ArrayList<>();
FirstFragment fragmentFirst; //added
Set it in your SectionsPagerAdapter:
@Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
switch (position) {
case 0:
Bundle bundle = new Bundle();
bundle.putString("date", date);
bundle.putInt("position", position);
fragmentFirst = new FirstFragment(); //modified
return fragmentFirst; //added
case 1:
return new SecondFragment();
}
return null;
}
Then, add , add sets to a Bundle, and pass it into FirstFragment in onTabSelected:
@Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
// When the given tab is selected, switch to the corresponding page in
// the ViewPager.
mViewPager.setCurrentItem(tab.getPosition());
if (fragmentFirst != null){
Bundle bundle = new Bundle();
bundle.putSerializable("sets", sets);
//fragmentFirst.setArguments(bundle); //not working
fragmentFirst.updateArguments(bundle); //try this
}
}
Edit: Add a new public method in FragmentFirst:
public void updateArguments(Bundle args) {
ArrayList<Set> x = new ArrayList<>();
x = (ArrayList<Set>) args.getSerializable("sets");
for(Set p: x) {
array.add(p);
}
mAddExerciseAdapter.notifyDataSetChanged();
}
这篇关于在同一活动2片段之间发送的ArrayList的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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