Android 切换布局时,RecyclerView复选框将失去价值
我的回收视图有问题。似乎每当手机进入横向模式,或在应用程序中切换布局时,先前选中的复选框都不会恢复 编辑------------------------------------------------ 这是我的回收器适配器:Android 切换布局时,RecyclerView复选框将失去价值,android,android-fragments,android-recyclerview,android-tablayout,android-checkbox,Android,Android Fragments,Android Recyclerview,Android Tablayout,Android Checkbox,我的回收视图有问题。似乎每当手机进入横向模式,或在应用程序中切换布局时,先前选中的复选框都不会恢复 编辑------------------------------------------------ 这是我的回收器适配器: public MyRecyclerAdapter(Context context, ArrayList<Workout> workout) { mContext = context; this.workout = workout; } // IN
public MyRecyclerAdapter(Context context, ArrayList<Workout> workout) {
mContext = context;
this.workout = workout;
}
// INITIALIZE HOLDER
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.workout_item, null);
MyViewHolder holder = new MyViewHolder(view);
return holder;
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
holder.exercise.setText(workout.get(position).getExercise());
holder.percent.setText(workout.get(position).getPercent());
holder.reps.setText(workout.get(position).getReps());
holder.weight.setText(workout.get(position).getWeight());
holder.check1.setOnCheckedChangeListener(null);
final Workout isCheck = workout.get(position);
holder.check1.setChecked(isCheck.isCheck1());
holder.check1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
isCheck.setCheck1(isChecked);
}
});
}
这里是碎片设置的地方:
public class WorkoutDaysActivity extends BaseActivity{
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.workout_days);
mToolBar = activateToolbar();
setUpNavigationDrawer();
getSupportActionBar().setTitle("Workout");
ViewPager vp = (ViewPager) findViewById(R.id.view_pager);
this.addPages(vp);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);
tabLayout.setupWithViewPager(vp);
tabLayout.setOnTabSelectedListener(listener(vp));
}
//ADD ALL PAGES
private void addPages(ViewPager pager) {
MyFragPagerAdapter adapter = new MyFragPagerAdapter(getSupportFragmentManager());
Intent intent = getIntent();
String workout = intent.getStringExtra("workout");
Bundle args = new Bundle();
args.putString("workout", workout);
MondayFragment mondayFragment = new MondayFragment();
mondayFragment.setArguments(args);
adapter.addPage(mondayFragment);
WedFragment wedFragment = new WedFragment();
wedFragment.setArguments(args);
adapter.addPage(wedFragment);
FridayFragment fridayFragment = new FridayFragment();
fridayFragment.setArguments(args);
adapter.addPage(fridayFragment);
pager.setAdapter(adapter);
}
没错,每次你关闭并重新打开它时,碎片都会被重新创建,当方向改变时也会发生同样的情况。回答你的问题,是的!有一些方法可以解决这个问题,我会使用SharedParferences来保存复选框的状态并将其恢复到该状态。例子
int firstSecondOrThird; //first page, second page or thrid page.
public MyRecyclerAdapter(Context context, ArrayList<Workout> workout, int thePosition) {
mContext = context;
this.workout = workout;
this.firstSecondOrThird = thePosition;
}
final SharedPreferences prefs;
@Override
public void onBindViewHolder(MyViewHolder holder, final int position) {
holder.exercise.setText(workout.get(position).getExercise());
//...
prefs = mContext.getSharedPreferences("ehehehe", Context.MODE_PRIVATE);
holder.check1.setChecked(prefs.getBoolean(firstSecondOrThird+"checkState"+position, false)); //restore the state of the CheckBox
isCheck.setCheck1(prefs.getBoolean(firstSecondOrThird+"checkState"+position, false)); //not sure what's this just copying from you ^^
holder.check1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
isCheck.setCheck1(isChecked);
prefs.edit().putBoolean(firstSecondOrThird+"checkState"+position, isChecked).apply(); //save the CheckBox's state
}
});
}
没错,每次你关闭并重新打开它时,碎片都会被重新创建,当方向改变时也会发生同样的情况。回答你的问题,是的!有一些方法可以解决这个问题,我会使用SharedParferences来保存复选框的状态并将其恢复到该状态。例子
int firstSecondOrThird; //first page, second page or thrid page.
public MyRecyclerAdapter(Context context, ArrayList<Workout> workout, int thePosition) {
mContext = context;
this.workout = workout;
this.firstSecondOrThird = thePosition;
}
final SharedPreferences prefs;
@Override
public void onBindViewHolder(MyViewHolder holder, final int position) {
holder.exercise.setText(workout.get(position).getExercise());
//...
prefs = mContext.getSharedPreferences("ehehehe", Context.MODE_PRIVATE);
holder.check1.setChecked(prefs.getBoolean(firstSecondOrThird+"checkState"+position, false)); //restore the state of the CheckBox
isCheck.setCheck1(prefs.getBoolean(firstSecondOrThird+"checkState"+position, false)); //not sure what's this just copying from you ^^
holder.check1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
isCheck.setCheck1(isChecked);
prefs.edit().putBoolean(firstSecondOrThird+"checkState"+position, isChecked).apply(); //save the CheckBox's state
}
});
}
您是否尝试保留片段实例
请在此处查看Android开发人员参考:
控制是否在活动重新创建期间保留片段实例(例如从配置更改)。这只能用于不在后堆栈中的片段。如果设置,则重新创建活动时片段生命周期将略有不同您是否尝试保留片段实例
请在此处查看Android开发人员参考:
控制是否在活动重新创建期间保留片段实例(例如从配置更改)。这只能用于不在后堆栈中的片段。如果设置了,当重新创建活动时,片段生命周期将略有不同我很高兴它成功了,您还需要其他帮助吗?我厌倦了Hanks,这很管用,不幸的是,因为我有一个可扩展列表视图,每个选项都会将应用程序发送到同一个带有3个选项卡的tablayout,每个选项卡都有recycler视图,它会为每个片段和每个可扩展列表视图选项保存选中的选项卡LOL。。有什么简单的方法可以解决这个问题吗?不只是一个视图持有者,每个回收器视图都使用相同的视图,只是数据不同,我从我的可扩展列表视图发送一个包,然后在创建片段的位置附加包,然后在每个片段中,我检查哪个字符串是从可扩展列表视图发送的,并使用switch语句设置数据好的,您可以发布适配器的构造函数以及如何为每个列表初始化适配器吗?让我们来。我很高兴它能工作,您还需要其他帮助吗?我厌倦了Hanks,这很管用,不幸的是,因为我有一个可扩展列表视图,每个选项都会将应用程序发送到同一个带有3个选项卡的tablayout,每个选项卡都有recycler视图,它会为每个片段和每个可扩展列表视图选项保存选中的选项卡LOL。。有什么简单的方法可以解决这个问题吗?不只是一个视图持有者,每个回收器视图都使用相同的视图,只是数据不同,我从我的可扩展列表视图发送一个包,然后在创建片段的位置附加包,然后在每个片段中,我检查哪个字符串是从可扩展列表视图发送的,并使用switch语句设置数据好的,您可以发布适配器的构造函数以及如何为每个列表初始化适配器吗?让我们来看看。
RecyclerView rv = (RecyclerView) view.findViewById(R.id.mRecyclerWed);
rv.setLayoutManager(new LinearLayoutManager(this.getActivity()));
rv.setAdapter(new MyRecyclerAdapter(this.getActivity(), getWedWorkout(), 1)); //in your first page
RecyclerView rv = (RecyclerView) view.findViewById(R.id.mRecyclerWed);
rv.setLayoutManager(new LinearLayoutManager(this.getActivity()));
rv.setAdapter(new MyRecyclerAdapter(this.getActivity(), getWedWorkout(), 2)); //in your second page, and 3 or the third