我一直在阅读有关如何动态地将EditText字段添加到我的线性布局的信息，每次用户点击TextView（附加了onClick Listener）。
我取得了一些成功 - 我知道正在创建EditText字段，因为当单击按钮时，所有其他元素都会向上移动，好像有什么东西被添加到屏幕上一样。
我的问题是EditText不可见，我不知道为什么会这样，所以任何帮助都会受到赞赏。
应用程序没有崩溃所以没有任何东西可以添加StackTrace和Log，就应用程序而言，一切都在创建。
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/linearLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/facebookBlue"
android:orientation="vertical"
android:weightSum="1"
tools:context="com.test.practise.AddTeamMembers">
<android.support.design.widget.TextInputEditText
android:id="@+id/tv_teamNames"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:text="@string/teamName"
android:textColor="@android:color/background_light"
android:textColorLink="@android:color/background_light"
android:textSize="30sp"
android:textStyle="bold" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.26"
android:orientation="vertical"
android:weightSum="1">
<TextView
android:id="@+id/textView3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="0.47"
android:gravity="center"
android:text="Enter Player Names Below!"
android:textColor="@android:color/background_light"
android:textSize="24sp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.16"
android:orientation="vertical"
android:weightSum="1">
<EditText
android:id="@+id/et_team_name1"
android:layout_width="232dp"
android:layout_height="37dp"
android:layout_centerVertical="true"
android:layout_gravity="center"
android:background="@android:color/background_light"
android:ems="10"
android:hint="Team Name"
android:imeOptions="actionDone"
android:inputType="text"
android:paddingLeft="70dp"
android:singleLine="true"
tools:layout_editor_absoluteX="76dp"
tools:layout_editor_absoluteY="188dp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.16"
android:orientation="vertical"
android:weightSum="1">
<EditText
android:id="@+id/et_team_name2"
android:layout_width="232dp"
android:layout_height="37dp"
android:layout_centerHorizontal="true"
android:layout_gravity="center"
android:background="@android:color/background_light"
android:ems="10"
android:hint="Team Name"
android:imeOptions="actionDone"
android:inputType="text"
android:paddingLeft="70dp"
android:singleLine="true"
tools:layout_editor_absoluteX="76dp"
tools:layout_editor_absoluteY="188dp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.16"
android:orientation="vertical"
android:weightSum="1">
<EditText
android:id="@+id/et_team_name3"
android:layout_width="232dp"
android:layout_height="37dp"
android:layout_gravity="center"
android:background="@android:color/background_light"
android:ems="10"
android:hint="Team Name"
android:imeOptions="actionDone"
android:inputType="text"
android:paddingLeft="70dp"
android:singleLine="true"
tools:layout_editor_absoluteX="76dp"
tools:layout_editor_absoluteY="188dp" />
</LinearLayout>
<LinearLayout
android:id="@+id/editTextGroupLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.07"
android:orientation="vertical"
android:weightSum="1">
<TextView
android:id="@+id/tv_add_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:text="+ Add Name"
android:textColor="@android:color/background_light"
android:textSize="16dp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:weightSum="1">
<Button
android:id="@+id/button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:background="@color/facebookBlue"
android:gravity="center"
android:text="Ready to join!"
android:textColor="@android:color/background_light" />
</LinearLayout>
</LinearLayout>
</ScrollView>
以下是调用上述XML的AddTeamMembers类
public class AddTeamMembers extends Fragment implements
View.OnClickListener
{
private SharedPreferences pref;
private TextView tv_teamNames, tv_add_name;
private LinearLayout mLayout;
//The below method must be overridden in order to implement a fragment -
this changes the lifecycle method
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.activity_add_team_members,
container, false);
initViews(view);
return view;
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
// 0, Sets Shared pref mode to private
pref = getActivity().getPreferences(0);
tv_teamNames.setText(pref.getString(Constants.Team_Name, ""));
}
private void initViews(View view) {
tv_teamNames = (TextView) view.findViewById(R.id.tv_teamNames);
tv_add_name = (TextView) view.findViewById(R.id.tv_add_name);
mLayout = (LinearLayout) view.findViewById(R.id.editTextGroupLayout);
tv_add_name.setOnClickListener(this);
}
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.tv_add_name:
createEditTextView();
break;
}
}
@TargetApi(Build.VERSION_CODES.M)
public void createEditTextView() {
try{
//dynamically create new EditText when user clicks to add another
name
//target user using API 22 and above (lollipop and above)
EditText editTextView = null;
if (android.os.Build.VERSION.SDK_INT >=
android.os.Build.VERSION_CODES.M) {
editTextView = new EditText(getContext());
}else{
Toast.makeText(getActivity(), "App is not supported on this
device",
Toast.LENGTH_LONG).show();
}
editTextView.setGravity(Gravity.CENTER);
LinearLayout.LayoutParams params = new
LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT, 1);
editTextView.setLayoutParams(params);
mLayout.addView(editTextView);
}catch(Exception e){
Log.d(TAG, "Failed to create new edit text");
}
}
}
[![Before Button is clicked][1]][1]
[![I have clicked 2 add 3 EditText here to make it obvious whats happening]
[2]][2]
[1]: https://i.stack.imgur.com/DGoPd.png
[2]: https://i.stack.imgur.com/3LWcY.png