如何在用户按下android studio中的空格/逗号后填充每个单词？
问题描述：
我目前正在尝试做一个android应用程序，我遇到了一个问题。你会如何让用户输入一个单词，一旦他们按空格/逗号，它会打开单词，最好使用退出选项。如何在用户按下android studio中的空格/逗号后填充每个单词？
https://i.stack.imgur.com/BwpZ9.png
https://i.stack.imgur.com/zqOLo.png
什么沿着这些图片的线路将是完美的。
答
这是我将如何实现它。这是一个工作示例。当用户点击它添加的项目和项目时。当你点击一个项目时，它会将其删除。
这是它在行动中的一个gif。 https://giphy.com/gifs/l4EpayEaAuGV58tgY
添加到摇篮：
compile 'com.android.support:design:26.0.0-alpha1'
compile 'com.android.support:recyclerview-v7:26.0.0-alpha1'
compile 'com.xiaofeng.android:flowlayoutmanager:1.2.3.2'
类
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycler);
recyclerView.setLayoutManager(new FlowLayoutManager());
recyclerView.setAdapter(new CustomRecyclerAdapter());
}
}
public class CustomRecyclerAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private static final int HOLDER_ERROR = 0;
private static final int HOLDER_BOX = 1;
private static final int HOLDER_EDIT = 2;
private List<Object> objectList = new ArrayList<>();
public CustomRecyclerAdapter() {
objectList.add(0);
}
public void addItem(String item) {
objectList.add(getItemCount() - 1, item);
notifyItemInserted(getItemCount() - 1);
}
public void removeItem(int position) {
objectList.remove(position);
notifyItemRemoved(position);
}
@Override
public int getItemCount() {
return objectList.size();
}
@Override
public int getItemViewType(int position) {
if (objectList.get(position) instanceof String) {
return HOLDER_BOX;
} else if (objectList.get(position) instanceof Integer) {
return HOLDER_EDIT;
} else {
return HOLDER_ERROR;
}
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
switch (viewType) {
case HOLDER_ERROR:
return null;
case HOLDER_BOX:
return new ViewHolderBox(LayoutInflater.from(parent.getContext()).inflate(R.layout.recycler_box, parent, false));
case HOLDER_EDIT:
return new ViewHolderEdit(LayoutInflater.from(parent.getContext()).inflate(R.layout.recycler_edit_text, parent, false));
default:
return null;
}
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
if (holder instanceof ViewHolderBox) {
ViewHolderBox mHolder = (ViewHolderBox) holder;
mHolder.bindItems();
} else if (holder instanceof ViewHolderEdit) {
ViewHolderEdit mHolder = (ViewHolderEdit) holder;
mHolder.bindItems();
}
holder.itemView.setTag(this);
}
private class ViewHolderEdit extends RecyclerView.ViewHolder implements TextWatcher {
private EditText edit;
private ViewHolderEdit(View itemView) {
super(itemView);
edit = itemView.findViewById(R.id.edit);
InputMethodManager imm = (InputMethodManager) itemView.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
imm.showSoftInputFromInputMethod(edit.getWindowToken(), 0);
}
private void bindItems() {
edit.addTextChangedListener(this);
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
String editString = edit.getText().toString();
Pattern pattern = Pattern.compile("\\s");
Matcher matcher = pattern.matcher(editString);
if (matcher.find()) {
if (!editString.trim().equalsIgnoreCase("")) {
addItem(editString.trim());
edit.setText("");
edit.requestFocus();
}
}
}
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
}
}
private class ViewHolderBox extends RecyclerView.ViewHolder implements View.OnClickListener {
private TextView text;
private ViewHolderBox(View itemView) {
super(itemView);
text = itemView.findViewById(R.id.text);
text.setOnClickListener(this);
}
private void bindItems() {
String item = (String) objectList.get(getAdapterPosition());
text.setText(item);
}
@Override
public void onClick(View view) {
removeItem(getAdapterPosition());
}
}
}
activity_main.xml中
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/recycler"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="resume.eugene.com.testing.MainActivity" />
recycler_box.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center">
<TextView
android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="34dp"
android:layout_marginBottom="2dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="2dp"
android:background="#90CAF9"
android:clickable="true"
android:gravity="center"
android:paddingLeft="12dp"
android:paddingRight="12dp"
android:text="Testing" />
</LinearLayout>
recycler_edit_text.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<EditText
android:id="@+id/edit"
android:layout_width="wrap_content"
android:layout_height="34dp"
android:layout_marginBottom="2dp"
android:layout_marginLeft="4dp"
android:layout_marginRight="4dp"
android:layout_marginTop="2dp"
android:background="@android:color/transparent"
android:gravity="center_vertical"
android:hint="Add Item"
android:minWidth="50dp"
android:textSize="15sp" />
</LinearLayout>
谢谢！我无法弄清楚它叫什么。 – xToyo
没问题，很高兴我可以帮助你，快乐的编码 –