Java 按键盘上的“回车”按钮应重定向到AlertDialog中的“确定”按钮
我正在尝试创建一个应用程序,其中代码被添加到自定义数组列表中 用户在单击加号图标时输入代码 我需要将用户限制为一行 我尝试使用android:maxLines=“1,但当我按enter键时,它仍然不起作用 我的问题是如何将ENTER按钮重定向到AlertDialog的OK按钮 以下是我的主要活动:Java 按键盘上的“回车”按钮应重定向到AlertDialog中的“确定”按钮,java,android,Java,Android,我正在尝试创建一个应用程序,其中代码被添加到自定义数组列表中 用户在单击加号图标时输入代码 我需要将用户限制为一行 我尝试使用android:maxLines=“1,但当我按enter键时,它仍然不起作用 我的问题是如何将ENTER按钮重定向到AlertDialog的OK按钮 以下是我的主要活动: import androidx.annotation.NonNull; import androidx.appcompat.app.AppCompatActivity; import androi
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;
import androidx.appcompat.widget.Toolbar;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import java.lang.reflect.Type;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
Boolean itIsEmpty = Boolean.FALSE;
EditText editText;
private static final String TAG = "Main Activity";
ArrayList<CodeId> codeArray = new ArrayList<>();
CodeIdListAdapter arrayAdapter;
public void addCodeReal(){
CodeId newCodeId = new CodeId(editText.getText().toString());
codeArray.add(newCodeId);
arrayAdapter.notifyDataSetChanged();
saveData();
Log.d(TAG, "onClick: " + newCodeId.toString());
}
public void addCode (View view){
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Enter code to add").setMessage("Search below to find and add the code");
final View customLayout = getLayoutInflater().inflate(R.layout.alert_dialog,null);
builder.setView(customLayout);
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
editText = customLayout.findViewById(R.id.editText);
editText.setOnKeyListener(new View.OnKeyListener() {
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if((event.getAction() == KeyEvent.ACTION_DOWN) && (event.getAction() == KeyEvent.KEYCODE_ENTER)){
if (editText.getText().toString() == ""){
return false;
}else{
addCodeReal();
}
}
return false;
}
});
addCodeReal();
}
});
builder.setNegativeButton("Cancel", null);
AlertDialog dialog = builder.create();
dialog.show();
}
public void saveData() {
SharedPreferences sharedPreferences = getSharedPreferences("shared preferences", MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
Gson gson = new Gson();
String json = gson.toJson(codeArray);
editor.putString("task list", json);
editor.apply();
Log.d(TAG, "saveData: " + codeArray.size());
}
private void loadData() {
SharedPreferences sharedPreferences = getSharedPreferences("shared preferences", MODE_PRIVATE);
Gson gson = new Gson();
String json = sharedPreferences.getString("task list", null);
Type type = new TypeToken<ArrayList<CodeId>>() {}.getType();
ArrayList<CodeId> mCodeArray;
mCodeArray = gson.fromJson(json, type);
if (mCodeArray == null) {
mCodeArray = new ArrayList<>();
}
for(int i = 0; i< mCodeArray.size();i++){
Log.d(TAG, "loadData: " + mCodeArray.get(i));
codeArray.add(mCodeArray.get(i));
arrayAdapter.notifyDataSetChanged();
}
Log.d(TAG, "loadData: " + codeArray.size());
}
private void deleteData(){
SharedPreferences sharedPreferences = getSharedPreferences("shared preferences", MODE_PRIVATE);
sharedPreferences.getString("task list", null);
Editor prefsEditor = sharedPreferences.edit();
prefsEditor.remove("task list");
while(itIsEmpty){
int i = 0;
i++;
if(prefsEditor.equals(null)){
Log.d(TAG, "deleteData: if part" + codeArray.get(i));
itIsEmpty = Boolean.TRUE;
}else{
Log.d(TAG, "deleteData: else part" + codeArray.get(i));
prefsEditor.remove("task list");
}
}
prefsEditor.commit();
Log.d(TAG, "deleteData: after clear");
codeArray.clear();
Log.d(TAG, "deleteData: before clear");
arrayAdapter.notifyDataSetChanged();
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ListView listView = findViewById(R.id.listView);
Toolbar toolbar = findViewById(R.id.toolbar_main);
setSupportActionBar(toolbar);
Boolean isFirstRun = getSharedPreferences("PREFERENCE", MODE_PRIVATE)
.getBoolean("isFirstRun", true);
if (isFirstRun) {
//show start activity
startActivity(new Intent(MainActivity.this, login_activity.class));
}
getSharedPreferences("PREFERENCE", MODE_PRIVATE).edit()
.putBoolean("isFirstRun", false).apply();
arrayAdapter = new CodeIdListAdapter(this,codeArray);
//ArrayAdapter arrayAdapter = new ArrayAdapter<String>(getApplicationContext(),android.R.layout.simple_list_item_1, codeList);
listView.setAdapter(arrayAdapter);
Log.d(TAG, "onCreate: loadData func working");
loadData();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.front_page_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(@NonNull MenuItem item) {
switch (item.getItemId()){
case R.id.action_del:
deleteData();
Toast.makeText(this, "Cleared!", Toast.LENGTH_SHORT).show();
default:
return super.onOptionsItemSelected(item);
}
}
}
导入androidx.annotation.NonNull;
导入androidx.appcompat.app.appcompat活动;
导入android.app.AlertDialog;
导入android.content.DialogInterface;
导入android.content.Intent;
导入android.content.SharedReferences;
导入android.content.SharedReferences.Editor;
导入android.os.Bundle;
导入android.util.Log;
导入android.view.KeyEvent;
导入android.view.Menu;
导入android.view.MenuItem;
导入android.view.view;
导入android.widget.EditText;
导入android.widget.ListView;
导入android.widget.Toast;
导入androidx.appcompat.widget.Toolbar;
导入com.google.gson.gson;
导入com.google.gson.reflect.TypeToken;
导入java.lang.reflect.Type;
导入java.util.ArrayList;
公共类MainActivity扩展了AppCompatActivity{
Boolean itIsEmpty=Boolean.FALSE;
编辑文本编辑文本;
私有静态最终字符串TAG=“Main Activity”;
ArrayList codeArray=新的ArrayList();
CodeIdListAdapter阵列适配器;
public void addCodeReal(){
CodeId newCodeId=newCodeId(editText.getText().toString());
add(newCodeId);
arrayAdapter.notifyDataSetChanged();
saveData();
d(标记“onClick:+newCodeId.toString());
}
公共无效添加代码(视图){
AlertDialog.Builder=新建AlertDialog.Builder(此);
builder.setTitle(“输入要添加的代码”).setMessage(“在下面搜索以查找和添加代码”);
最终视图customLayout=GetLayoutFlater().充气(R.layout.alert_对话框,空);
builder.setView(自定义布局);
setPositiveButton(“确定”,新的DialogInterface.OnClickListener(){
@凌驾
public void onClick(DialogInterface dialog,int which){
editText=customLayout.findViewById(R.id.editText);
editText.setOnKeyListener(新视图.OnKeyListener(){
@凌驾
公共布尔onKey(视图v、int keyCode、KeyEvent事件){
如果((event.getAction()==KeyEvent.ACTION\u DOWN)&&(event.getAction()==KeyEvent.KEYCODE\u ENTER)){
如果(editText.getText().toString()==“”){
返回false;
}否则{
addCodeReal();
}
}
返回false;
}
});
addCodeReal();
}
});
builder.setNegativeButton(“取消”,null);
AlertDialog=builder.create();
dialog.show();
}
公共void saveData(){
SharedPreferences SharedPreferences=getSharedPreferences(“共享首选项”,模式\私人);
SharedReferences.Editor=SharedReferences.edit();
Gson Gson=新的Gson();
字符串json=gson.toJson(codeArray);
putString(“任务列表”,json);
editor.apply();
Log.d(标记“saveData:+coderaray.size());
}
私有void loadData(){
SharedPreferences SharedPreferences=getSharedPreferences(“共享首选项”,模式\私人);
Gson Gson=新的Gson();
String json=SharedReferences.getString(“任务列表”,null);
Type Type=new-TypeToken(){}.getType();
ArrayList-mCodeArray;
mCodeArray=gson.fromJson(json,类型);
if(mCodeArray==null){
mCodeArray=newarraylist();
}
对于(int i=0;i<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="@+id/floatingActionButton3"
android:layout_width="109dp"
android:layout_height="58dp"
android:layout_marginStart="286dp"
android:layout_marginTop="596dp"
android:layout_marginEnd="11dp"
android:layout_marginBottom="25dp"
android:clickable="true"
android:onClick="addCode"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.33"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.19"
app:srcCompat="@android:drawable/ic_input_add" />
<ListView
android:id="@+id/listView"
android:layout_width="368dp"
android:layout_height="613dp"
android:layout_marginTop="39dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.appcompat.widget.Toolbar
android:id="@+id/toolbar_main"
android:layout_width="411dp"
android:layout_height="51dp"
android:layout_marginBottom="21dp"
android:background="?attr/colorPrimary"
android:minHeight="?attr/actionBarSize"
android:theme="?attr/actionBarTheme"
app:layout_constraintBottom_toTopOf="@+id/listView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0" />
</androidx.constraintlayout.widget.ConstraintLayout>