安卓 Java EditText未正确验证
有人能帮忙吗？我的编辑文本不是空的，但是祝酒词仍然出现。我的应用程序要求用户选择日期和时间，然后在列表视图中选择一项继续。之后会弹出一个对话框。然而由于某种原因，即使我的edittext不是空的，它仍然不允许我继续。我似乎不知道怎么回事，我的意思是代码就是这么简单，没有什么复杂的
final String date = textDate1.getText().toString().trim();
final String time = textTime1.getText().toString().trim();
listViewHistory.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
final Team team = teams.get(i);
if(TextUtils.isEmpty(date)){
Toast.makeText(RecreateActivity.this,"Please choose a date.",Toast.LENGTH_LONG).show();
return;
}
if(TextUtils.isEmpty(time)){
Toast.makeText(RecreateActivity.this,"Please choose a time.",Toast.LENGTH_LONG).show();
return;
}
//the rest of the code
final AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(RecreateActivity.this);
LayoutInflater inflater = getLayoutInflater();
final View dialogView = inflater.inflate(R.layout.confirm_layout, null);
dialogBuilder.setView(dialogView);
final Button buttonYes2 = (Button) dialogView.findViewById(R.id.buttonYes2);
final Button buttonNo2 = (Button) dialogView.findViewById(R.id.buttonNo2);
//final Team team = teams.get();
final AlertDialog b = dialogBuilder.create();
b.show();
buttonYes2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
databaseMembers.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
final ArrayList<String> CheckList = new ArrayList<String>();
for (DataSnapshot check : dataSnapshot.child("teams").getChildren()) {
CheckList.add(check.getKey());
}
if (CheckList.contains(team.getTeamName())) {
Toast.makeText(RecreateActivity.this, "Team already exist.", Toast.LENGTH_LONG).show();
return;
}
databaseMembers.child("History").child(team.getTeamName()).child("date").setValue(date);
databaseMembers.child("History").child(team.getTeamName()).child("time").setValue(time);
for (DataSnapshot history : dataSnapshot.child("History").child(encodedEmailAddress).getChildren()) {
String key = history.getKey();
if (key.equals(team.getTeamName())) {
teams.clear();
Team team = history.getValue(Team.class);
teams.add(team);
databaseTeams.child(team.getTeamName()).setValue(team);
}
if (key.equals("teamMember")) {
for (DataSnapshot members : dataSnapshot.child("History").child(encodedEmailAddress).child("teamMember").getChildren()) {
String key2 = members.getKey();
String value = members.getValue(String.class);
Map<String, Object> map = new HashMap<>();
map.put(key2, value);
databaseMembers.child("members").child(team.getTeamName()).child("teamMember").updateChildren(map);
b.dismiss();
}
}
}
Toast.makeText(RecreateActivity.this, "Team created.", Toast.LENGTH_LONG).show();
Intent myIntent = new Intent(RecreateActivity.this,
MainActivity.class);
startActivity(myIntent);
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
});
}
XML:
<TextView
安卓:id="@+id/textView2"
安卓:layout_width="match_parent"
安卓:layout_height="wrap_content"
安卓:text="Previous Team"
安卓:textAppearance="@style/TextAppearance.AppCompat.Title"
安卓:textAlignment="center"/>
<TextView
安卓:id="@+id/textView3"
安卓:layout_width="match_parent"
安卓:layout_height="wrap_content"
安卓:text="Select new Date/Time and tap on the Team."
安卓:textAlignment="center"/>
<ListView
安卓:id="@+id/listViewHistory"
安卓:layout_width="match_parent"
安卓:layout_height="wrap_content"
安卓:layout_weight="1">
</ListView>
<TextView
安卓:id="@+id/textView5"
安卓:layout_width="match_parent"
安卓:layout_height="wrap_content"
安卓:text="Members:"
安卓:textAppearance="@style/TextAppearance.AppCompat.Headline" />
<TextView
安卓:id="@+id/textViewList"
安卓:layout_width="match_parent"
安卓:layout_height="wrap_content"
安卓:text=""
安卓:textAppearance="@style/TextAppearance.AppCompat.Medium" />
<EditText
安卓:id="@+id/textDate1"
安卓:layout_width="match_parent"
安卓:layout_height="wrap_content"
安卓:hint="Select Date..."
安卓:layout_alignParentStart="true" />
<EditText
安卓:id="@+id/textTime1"
安卓:layout_width="match_parent"
安卓:layout_height="wrap_content"
安卓:hint="Select Time..."
安卓:layout_below="@+id/textDate"
安卓:layout_alignParentStart="true" />
<Button
安卓:id="@+id/buttonAddHistory"
安卓:layout_width="match_parent"
安卓:layout_height="wrap_content"
安卓:text="Create Team"
安卓:textAlignment="center"
安卓:textAllCaps="false"
tools:textSize="20sp" />
# 1 楼答案
您的代码正在OnClick Listener的外部设置[date]和[time]。当用户单击该按钮时，代码不会重置变量。我会直接从onClickListener代码中计算EditText：
# 2 楼答案
尝试在单击侦听器中获取edittext的日期值
# 3 楼答案
您仅从
EditText获取一次字符串-在设置OnItemClickListener之前。你需要在监听器中输入字符串