我的Android应用程序中有这个奇怪的错误。我有一个带有回收者视图的活动和一些项目（在我的情况下，学校科目有四个textViews和一个framelayout）。
单击某个项目时，将执行包含共享元素的转换，并输入EditActivity，您可以在其中编辑主题。转换完成后，editText中的文本向上移动。只有当您单击editText时，文本才会正常，我不知道为什么。有时文本显得正常。也许是因为我从textView（在项目中）转换为editText（在EditActitvty中）。
请指教。这是我的代码。
SubjectActivity.java：
@Override
protected void onCreate(Bundle savedInstanceState) {
if (Learn.sdk21()) {
//To enable window content transitions in your code instead, call the Window.requestFeature() method:
getWindow().requestFeature(android.view.Window.FEATURE_CONTENT_TRANSITIONS);
Transition ts_enter = new Explode(); //Slide(); //Explode();
Transition ts_exit = new ChangeBounds();
ts_enter.setDuration(Learn.animationTime);
ts_exit.setDuration(Learn.animationTime);
/*
If you have set an enter transition for the second activity,
the transition is also activated when the activity starts.
*/
getWindow().setEnterTransition(ts_enter);
getWindow().setExitTransition(ts_exit);
}
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_subject);
//Database
dao = new DAO(getApplicationContext());
subjectList = dao.getAllSubjectsAlphabetical();
//Custom Toolbar
toolbar = (Toolbar) findViewById(R.id.toolbar_main);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
toolbar.setTitle(R.string.Subject);
recyclerViewSubject = (RecyclerView) findViewById(R.id.recyclerViewSubject);
setRecyclerViewSubject();
//FloatingActionButton
fabAddSubject = (FloatingActionButton)
findViewById(R.id.fabAddSubject);
fabAddSubject.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startActivity(new Intent(getApplicationContext(), AddSubjectActivity.class));
}
});
fabAddSubject.attachToRecyclerView(recyclerViewSubject);
}
private void setRecyclerViewSubject() {
//RecyclerView
subjectRecyclerViewAdapter =
new SubjectRecyclerViewAdapter(this, dao.getAllSubjectsAlphabetical());
subjectRecyclerViewAdapter.setClickListener(this);
recyclerViewSubject.setLayoutManager(new LinearLayoutManager(this));
recyclerViewSubject.setAdapter(new ScaleInAnimationAdapter(subjectRecyclerViewAdapter));
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_subject, menu);
return true;
}
@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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
} else if (id == android.R.id.home) {
this.finish();
return true;
} else if (id == R.id.debugDelete) {
try {
deleteAll();
} catch (Exception e) {
System.out.println("--> Tried to delete all but: " + e + "<--");
}
return true;
} else if (id == R.id.debugAdd) {
try {
add();
} catch (Exception e) {
System.out.println("--> Tried to delete add5: " + e + "<--");
}
return true;
} else if (id == R.id.refreshSubjectList) {
subjectList = dao.getAllSubjectsAlphabetical();
subjectRecyclerViewAdapter.dataChange(subjectList);
}
return super.onOptionsItemSelected(item);
}
@Override
public void itemClicked(View v, int postion) {
editSubject(v, postion);
}
private void editSubject(View v, int pos) {
Intent intent = new Intent(getApplicationContext(), EditSubjectActivity.class);
intent.putExtra("subjectPos", pos);
if (Learn.sdk21()) {
View view = findViewById(R.id.buttonColor);
Pair<View, String> p1 = Pair.create(v.findViewById(R.id.frameLayoutSubjectColor),
v.findViewById(R.id.frameLayoutSubjectColor).getTransitionName());
Pair<View, String> p2 = Pair.create(v.findViewById(R.id.textViewSubject),
v.findViewById(R.id.textViewSubject).getTransitionName());
Pair<View, String> p3 = Pair.create(v.findViewById(R.id.textViewShort),
v.findViewById(R.id.textViewShort).getTransitionName());
Pair<View, String> p4 = Pair.create(v.findViewById(R.id.textViewRoom),
v.findViewById(R.id.textViewRoom).getTransitionName());
Pair<View, String> p5 = Pair.create(v.findViewById(R.id.textViewTeacher),
v.findViewById(R.id.textViewTeacher).getTransitionName());
Pair<View, String> p6 = Pair.create(findViewById(R.id.fabAddSubject),
findViewById(R.id.fabAddSubject).getTransitionName());
ActivityOptions options = ActivityOptions.makeSceneTransitionAnimation(SubjectActivity.this,
p1, p2, p3, p4, p5, p6);
intent.putExtra("SubjectColor", v.findViewById(R.id.frameLayoutSubjectColor).getTransitionName());
intent.putExtra("SubjectName", v.findViewById(R.id.textViewSubject).getTransitionName());
intent.putExtra("SubjectShort", v.findViewById(R.id.textViewShort).getTransitionName());
intent.putExtra("SubjectRoom", v.findViewById(R.id.textViewRoom).getTransitionName());
intent.putExtra("SubjectTeacher", v.findViewById(R.id.textViewTeacher).getTransitionName());
startActivityForResult(intent, 12, options.toBundle());
} else {
startActivityForResult(intent, 12);
}
}
private void add() {
String[] name = {"Deutsch", "Englisch", "Biologie", "Mathe", "Geschichte",
"Musik", "Physik", "Politik", "Informatik", "Religion"};
String[] nameshort = {"Deu", "Eng", "Bio", "Mat", "Gesch",
"Mus", "Phy", "PoWi", "Info", "Reli"};
String[] room = {"A222", "T292", "B322", "M22", "G666",
"A373", "B888", "C938", "I999", "T666"};
String[] t = {"Test1", "Test2", "Test3", "Test4", "Test5",
"Test6", "Test7", "Test8", "Test9", "Test10"};
String[] c = {"#fff200", "#ff0000", "#ff9000", "#00bbff", "#2aff00",
"#0037ff", "#90ff00", "#00ff4c", "#00ffb2", "#4c00ff"};
for (int i = 0; i < name.length; i++) {
Subject subject = new Subject(name[i], nameshort[i], room[i], t[i], Color.parseColor(c[i]));
dao.addSubject(subject);
}
setRecyclerViewSubject();
}
private void deleteAll() {
int oldSize = dao.getAllSubjects().size();
for (int i = (oldSize - 1); i >= 0; i--) {
int id = dao.getAllSubjects().get(i).getId();
dao.deleteSubject(id);
}
subjectRecyclerViewAdapter =
new SubjectRecyclerViewAdapter(getApplicationContext(), dao.getAllSubjectsAlphabetical());
recyclerViewSubject.setAdapter(new ScaleInAnimationAdapter(subjectRecyclerViewAdapter));
recyclerViewSubject.setLayoutManager(new LinearLayoutManager(this));
subjectRecyclerViewAdapter.notifyItemRangeRemoved(0, dao.getAllSubjects().size());
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
int subId = data.getIntExtra("subjectId", 0);
int subPos = data.getIntExtra("subjectPos", 0);
int subNewPos = data.getIntExtra("subjectNewPos", subPos);
subjectList = dao.getAllSubjectsAlphabetical();
System.out.print("requestCode" + requestCode
+ "\n" +
"resultCode" + resultCode
+ "\n" +
"subId" + subId
+ "\n" +
"subPos" + subPos
+ "\n" +
"subNewPos" + subNewPos);
if (requestCode == 12) {
if (resultCode == 2) {//Edit
subjectRecyclerViewAdapter.updateItem(subjectList, subPos, subNewPos);
recyclerViewSubject.setAdapter(subjectRecyclerViewAdapter);
} else if (resultCode == 3) {//Delete
subjectRecyclerViewAdapter.removeItem(subjectList, subPos);
recyclerViewSubject.setAdapter(subjectRecyclerViewAdapter);
}
}
}
}
EditSubjectActivity.java：
@Override
protected void onCreate(Bundle savedInstanceState) {
if (Learn.sdk21()) {
//To enable window content transitions in your code instead, call the Window.requestFeature() method:
getWindow().requestFeature(android.view.Window.FEATURE_CONTENT_TRANSITIONS);
Transition ts_enter = new Explode(); //Slide(); //Explode();
Transition ts_exit = new ChangeBounds(); //Slide(); //Explode();
ts_enter.setDuration(Learn.animationTime);
ts_exit.setDuration(Learn.animationTime);
getWindow().setEnterTransition(ts_enter);
getWindow().setExitTransition(ts_exit);
}
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_edit_subject);
//Database
dao = new DAO(getApplicationContext());
//Custom Toolbar
toolbar = (Toolbar) findViewById(R.id.toolbar_main);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
buttonColor = (Button) findViewById(R.id.buttonColor);
buttonColor.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
colorPickerDialog = new ColorPickerDialog(EditSubjectActivity.this, subject.getColor());
colorPickerDialog.setAlphaSliderVisible(false);
colorPickerDialog.setHexValueEnabled(true);
colorPickerDialog.setTitle("Background");
colorPickerDialog.setOnColorChangedListener(new ColorPickerDialog.OnColorChangedListener() {
@Override
public void onColorChanged(int i) {
subject.setColor(i);
buttonColor.setText("#" + Integer.toHexString(subject.getColor()));
buttonColor.setBackgroundColor(i);
}
});
colorPickerDialog.show();
}
});
//EditText
editTextSubject = (EditText) findViewById(R.id.editTextSubject);
editTextShort = (EditText) findViewById(R.id.editTextShort);
editTextRoom = (EditText) findViewById(R.id.editTextRoom);
editTextTeacher = (EditText) findViewById(R.id.editTextTeacher);
//FAB
fabSaveSubject = (FloatingActionButton) findViewById(R.id.fabSaveSubject);
fabSaveSubject.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
saveSubject();
}
});
fabDeleteSubject = (FloatingActionButton) findViewById(R.id.fabDeleteSubject);
fabDeleteSubject.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
deleteSubject();
}
});
setUp();
if(Learn.sdk21()){
Intent intent = getIntent();
editTextSubject.setTransitionName(intent.getStringExtra("SubjectName"));
editTextShort.setTransitionName(intent.getStringExtra("SubjectShort"));
editTextRoom.setTransitionName(intent.getStringExtra("SubjectRoom"));
editTextTeacher.setTransitionName(intent.getStringExtra("SubjectTeacher"));
buttonColor.setTransitionName(intent.getStringExtra("SubjectColor"));
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_add_subject, menu);
return true;
}
@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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
} else if (id == android.R.id.home) {
finish(1);
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onBackPressed() {
super.onBackPressed();
finish(1);
}
private void saveSubject() {
subject.setSubject(editTextSubject.getText().toString());
subject.setSubjectShort(editTextShort.getText().toString());
subject.setRoom(editTextRoom.getText().toString());
subject.setTeacher(editTextTeacher.getText().toString());
dao.updateSubject(subjectId, subject);
finish(2);
}
private void deleteSubject() {
dao.deleteSubject(subjectId);
finish(3);
}
private void setUp() {
Intent intent = getIntent();
subjectPos = intent.getIntExtra("subjectPos", 0);
subject = dao.getAllSubjectsAlphabetical().get(subjectPos);
subjectId = subject.getId();
editTextSubject.setText(subject.getSubject());
editTextShort.setText(subject.getSubjectShort());
editTextRoom.setText(subject.getRoom());
editTextTeacher.setText(subject.getTeacher());
buttonColor.setText("#" + Integer.toHexString(subject.getColor()));
buttonColor.setBackgroundColor(subject.getColor());
}
private void finish(int i) {
Intent intent = new Intent();
intent.putExtra("subjectPos", subjectPos);
intent.putExtra("subjectId", subjectId);
setResult(i, intent);
switch (i) {
case 1: //Nothing
finishAfterTransition();
break;
case 2: //Edit
int newPos = dao.getSubjectPosition(dao.getAllSubjectsAlphabetical(), subject);
intent.putExtra("subjectNewPos", newPos);
finishAfterTransition();
break;
case 3: //Delete
finish();
break;
}
}
}
SubjectRecyclerViewAdapter.java：
public class SubjectRecyclerViewAdapter
extends RecyclerView.Adapter
<SubjectRecyclerViewAdapter.subjectViewHolder> {
LayoutInflater inflater;
List<Subject> subjectList;
Context context;
ClickListener clickListener;
DAO dao;
public SubjectRecyclerViewAdapter(Context context, List<Subject> subjectList) {
inflater = LayoutInflater.from(context);
this.subjectList = subjectList;
this.context = context;
dao = new DAO(context);
}
@Override
public subjectViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = inflater.inflate(R.layout.subject_item, parent, false);
subjectViewHolder holder = new subjectViewHolder(view);
return holder;
}
@Override
public void onBindViewHolder(subjectViewHolder holder, int position) {
Subject subject = subjectList.get(position);
holder.textViewSubject.setText(subject.getSubject());
holder.textViewShort.setText(subject.getSubjectShort());
holder.textViewTeacher.setText(subject.getTeacher());
holder.textViewRoom.setText(subject.getRoom());
holder.frameLayoutSubjectColor.setBackgroundColor(subject.getColor());
if (Learn.sdk21()) {
holder.textViewSubject.setTransitionName("SubjectName_"+position);
holder.textViewShort.setTransitionName("SubjectShort_"+position);
holder.textViewTeacher.setTransitionName("SubjectTeacher_"+position);
holder.textViewRoom.setTransitionName("SubjectRoom_"+position);
holder.frameLayoutSubjectColor.setTransitionName("SubjectColor_" + position);
}
}
@Override
public int getItemCount() {
return subjectList.size();
}
public class subjectViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
TextView textViewSubject,textViewShort, textViewRoom, textViewTeacher;
FrameLayout frameLayoutSubjectColor;
public subjectViewHolder(View itemView) {
super(itemView);
textViewSubject = (TextView) itemView.findViewById(R.id.textViewSubject);
textViewShort = (TextView) itemView.findViewById(R.id.textViewShort);
textViewRoom = (TextView) itemView.findViewById(R.id.textViewRoom);
textViewTeacher = (TextView) itemView.findViewById(R.id.textViewTeacher);
frameLayoutSubjectColor = (FrameLayout) itemView.findViewById(R.id.frameLayoutSubjectColor);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View v) {
if (clickListener != null) {
clickListener.itemClicked(v, getPosition());
}
}
}
public interface ClickListener {
public void itemClicked(View v, int postion);
}
public void setClickListener(ClickListener clickListener) {
this.clickListener = clickListener;
}
public void removeItem(List<Subject> subjectList, int pos) {
this.subjectList = subjectList;
notifyItemRemoved(pos);
System.out.println("removeItem");
}
public void updateItem(List<Subject> subjectList, int pos, int newPos) {
this.subjectList = subjectList;
notifyItemChanged(pos);
if (pos != newPos) {
notifyItemMoved(pos, newPos);
}
System.out.println("updateItem");
}
public void dataChange(List<Subject> subjectList) {
this.subjectList = subjectList;
notifyDataSetChanged();
System.out.println("dataChange");
}
}