（我要说清楚的第一件事就是我完全是NEWBIE，在android中非常初学者，实际上是编程/编码！）
菜单在onCreateOptionMenu中引用，调用方法也是onOptionsItemSelected打开菜单，但每个选项/项的方法设置为onMenuItemClick和onMenuItemLongClick，这是上下文菜单选项/项目的理想选择！
问题是onMenuItemClick将输入参数设置为（View v，int position），我无法将其更改为（View v）或（MenuItem item）。
我想要点击每个菜单项目应该带来新的活动！
我也尝试将所有switch-case-break语句放到onOptionsItemSelected方法中，但它仍然无效！
我也尝试过片段类，setHasOptionsMenu（true）;但它不起作用！
onMenuItemClick doesn't get called
(Deprecated) Fragment onOptionsItemSelected not being called
以下是activity_main_menu.xml布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@color/menu_item_background">
<include layout="@layout/toolbar" />
<FrameLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
下面是fragment_main.xml布局
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.android.coffeeshop.MainFragment">
<!-- TODO: Update blank fragment layout -->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:background="@color/menu_item_background">
<EditText
android:id="@+id/username"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:cursorVisible="true"
android:hint="@string/EditTextHint"
android:inputType="textNoSuggestions" />
<EditText
android:id="@+id/usercontact"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:cursorVisible="true"
android:hint="@string/usercontactHint"
android:inputType="textNoSuggestions" />
<EditText
android:id="@+id/useremail"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:cursorVisible="true"
android:hint="@string/useremailHint"
android:inputType="textEmailAddress" />
<TextView
style="@style/HeaderTextStyle"
android:layout_marginTop="16dp"
android:text="@string/Toppings" />
<CheckBox
android:id="@+id/whippedCreamcheckbox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:paddingEnd="24dp"
android:paddingLeft="24dp"
android:paddingStart="24dp"
android:text="@string/WhippedCream"
android:textSize="16sp" />
<CheckBox
android:id="@+id/Chocolatebox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:paddingEnd="24dp"
android:paddingLeft="24dp"
android:paddingStart="24dp"
android:text="@string/Chocolate"
android:textSize="16sp" />
<TextView
style="@style/HeaderTextStyle"
android:layout_marginTop="16dp"
android:text="@string/quantity" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:layout_width="48dp"
android:layout_height="48dp"
android:layout_marginTop="16dp"
android:onClick="decrement"
android:text="@string/minus" />
<TextView
android:id="@+id/quantity_text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="16dp"
android:text="@string/Zero"
android:textColor="@android:color/black"
android:textSize="20sp" />
<Button
android:layout_width="48dp"
android:layout_height="48dp"
android:layout_marginTop="16dp"
android:onClick="increment"
android:text="@string/plus" />
</LinearLayout>
<TextView
style="@style/HeaderTextStyle"
android:layout_marginTop="16dp"
android:text="@string/OrderSummary" />
<TextView
android:id="@+id/order_summary_text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:text="@string/Price"
android:textColor="@android:color/black"
android:textSize="20sp" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:id="@+id/orderButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:onClick="submitOrder"
android:text="@string/Order" />
<Button
android:id="@+id/placeOrder"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:onClick="placeOrder"
android:text="@string/PlaceOrder" />
</LinearLayout>
</LinearLayout>
</ScrollView>
下面是我试图处理片段菜单的MainMenu.java类文件！
package com.example.android.coffeeshop5profile;
import android.app.ProgressDialog;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.ActionMenuView;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import com.yalantis.contextmenu.lib.ContextMenuDialogFragment;
import com.yalantis.contextmenu.lib.MenuObject;
import com.yalantis.contextmenu.lib.MenuParams;
import com.yalantis.contextmenu.lib.interfaces.OnMenuItemLongClickListener;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
/**
* This app displays an order form to order coffee.
*/
public class MainMenu extends AppCompatActivity implements ActionMenuView.OnMenuItemClickListener, OnMenuItemLongClickListener {
private FragmentManager fragmentManager;
private ContextMenuDialogFragment mMenuDialogFragment;
int quantity = 1;
int price = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_menu);
fragmentManager = getSupportFragmentManager();
initToolbar();
initMenuFragment();
addFragment(new MainFragment(), true, R.id.container);
}
private void initMenuFragment() {
MenuParams menuParams = new MenuParams();
menuParams.setActionBarSize((int) getResources().getDimension(R.dimen.tool_bar_height));
menuParams.setMenuObjects(getMenuObjects());
menuParams.setClosableOutside(false);
mMenuDialogFragment = ContextMenuDialogFragment.newInstance(menuParams);
mMenuDialogFragment.setItemLongClickListener(this);
}
private List<MenuObject> getMenuObjects() {
List<MenuObject> menuObjects = new ArrayList<>();
MenuObject close = new MenuObject();
close.setResource(R.drawable.icn_close);
MenuObject send = new MenuObject("Send message");
send.setResource(R.drawable.icn_1);
MenuObject like = new MenuObject("Like profile");
Bitmap b = BitmapFactory.decodeResource(getResources(), R.drawable.icn_2);
like.setBitmap(b);
MenuObject addFr = new MenuObject("Add to friends");
BitmapDrawable bd = new BitmapDrawable(getResources(),
BitmapFactory.decodeResource(getResources(), R.drawable.icn_3));
addFr.setDrawable(bd);
MenuObject addFav = new MenuObject("Add to favorites");
addFav.setResource(R.drawable.icn_4);
MenuObject block = new MenuObject("Block user");
block.setResource(R.drawable.icn_5);
menuObjects.add(close);
menuObjects.add(send);
menuObjects.add(like);
menuObjects.add(addFr);
menuObjects.add(addFav);
menuObjects.add(block);
return menuObjects;
}
private void initToolbar() {
Toolbar mToolbar = (Toolbar) findViewById(R.id.toolbar);
TextView mToolBarTextView = (TextView) findViewById(R.id.text_view_toolbar_title);
setSupportActionBar(mToolbar);
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowTitleEnabled(false);
mToolbar.setNavigationIcon(R.drawable.btn_back);
mToolbar.setNavigationOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onBackPressed();
}
});
mToolBarTextView.setText(R.string.title_text);
}
protected void addFragment(Fragment fragment, boolean addToBackStack, int containerId) {
invalidateOptionsMenu();
String backStackName = fragment.getClass().getName();
boolean fragmentPopped = fragmentManager.popBackStackImmediate(backStackName, 0);
if (!fragmentPopped) {
FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.add(containerId, fragment, backStackName)
.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
if (addToBackStack)
transaction.addToBackStack(backStackName);
transaction.commit();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.context_main_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.context_menu:
if (fragmentManager.findFragmentByTag(ContextMenuDialogFragment.TAG) == null) {
mMenuDialogFragment.show(fragmentManager, ContextMenuDialogFragment.TAG);
}
break;
case R.drawable.icn_3:
Intent userProfileIntent = new Intent(MainMenu.this, UserProfile.class);
MainMenu.this.startActivity(userProfileIntent);
break;
case R.drawable.icn_4:
Intent wishListIntent = new Intent(MainMenu.this, UserProfile.class);
MainMenu.this.startActivity(wishListIntent);
break;
}
return false; //Turning this true or to super.OnOptionsItemSelected did nothing!
}
@Override
public void onBackPressed() {
if (mMenuDialogFragment != null && mMenuDialogFragment.isAdded()) {
mMenuDialogFragment.dismiss();
} else {
finish();
}
}
@Override
public boolean onMenuItemClick(MenuItem item) {
switch (item.getItemId()){
case R.drawable.icn_3:
Intent userProfileIntent = new Intent(MainMenu.this, UserProfile.class);
MainMenu.this.startActivity(userProfileIntent);
break;
case R.drawable.icn_4:
Intent wishListIntent = new Intent(MainMenu.this, UserProfile.class);
MainMenu.this.startActivity(wishListIntent);
break;
} return true;
}
@Override
public void onMenuItemLongClick(View clickedView, int position) {
Toast.makeText(this, "Long clicked on position: " + position, Toast.LENGTH_SHORT).show();
}
public void submitOrder(View view) {
String orderSummaryString = createOrderSummary(quantity);
displayMessage(orderSummaryString);
}
public void placeOrder(View view) {
TextView useremail = (TextView) findViewById(R.id.useremail);
String useremailString = useremail.getText().toString();
String orderSummaryString = createOrderSummary(quantity);
sendMail(useremailString, "Coffee Order By: " + useremailString, orderSummaryString);
}
private void sendMail(String email, String subject, String messageBody) {
Session session = createSessionObject();
try {
Message message = createMessage(email, subject, messageBody, session);
new SendMailTask().execute(message);
} catch (MessagingException | UnsupportedEncodingException e) {
e.printStackTrace();
}
}
private Message createMessage(String email, String subject, String messageBody, Session session)
throws MessagingException, UnsupportedEncodingException {
Message message = new MimeMessage(session);
message.setFrom(new InternetAddress("clientaddress@gmail.com", "Coffee Order By"));
message.addRecipient(Message.RecipientType.TO, new InternetAddress(email, email));
message.setSubject(subject);
message.setText(messageBody);
return message;
}
private Session createSessionObject() {
Properties properties = new Properties();
properties.put("mail.smtp.auth", "true");
properties.put("mail.smtp.starttls.enable", "true");
properties.put("mail.smtp.host", "smtp.gmail.com");
properties.put("mail.smtp.port", "587");
return Session.getInstance(properties, new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication("clientaddress@gmail.com", "************");
}
});
}
public class SendMailTask extends AsyncTask<Message, Void, Void> {
private ProgressDialog progressDialog;
@Override
protected void onPreExecute() {
super.onPreExecute();
progressDialog = ProgressDialog.show(MainMenu.this, "Please wait", "Sending mail", true, false);
}
@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
progressDialog.dismiss();
}
@Override
public Void doInBackground(Message... messages) {
try {
Transport.send(messages[0]);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
/**
* This method is called when the plus button is clicked.
*/
public void increment(View view) {
if (quantity < 100) {
quantity = quantity + 1;
displayQuantity(quantity);
} else {
Toast.makeText(this, "You have reached maximum numbers of coffees to be allowed!", Toast.LENGTH_SHORT).show();
}
}
/**
* This method is called when the minus button is clicked.
*/
public void decrement(View view) {
if (quantity >= 2) {
quantity = quantity - 1;
displayQuantity(quantity);
} else {
Toast.makeText(this, "You can not place order in negative number!", Toast.LENGTH_SHORT).show();
}
}
public String createOrderSummary(int quantity) {
CheckBox whippedCreamCheckbox = (CheckBox) findViewById(R.id.whippedCreamcheckbox);
boolean hasWhippedCream = whippedCreamCheckbox.isChecked();
CheckBox chocolatebox = (CheckBox) findViewById(R.id.Chocolatebox);
boolean hasChocolate = chocolatebox.isChecked();
price = 5;
if (hasWhippedCream) {
price = price + 1;
}
if (hasChocolate) {
price = price + 2;
}
int finalPrice = quantity * price;
EditText usernameTextView = (EditText) findViewById(R.id.username);
String usernameString = usernameTextView.getText().toString();
EditText usercontact = (EditText) findViewById(R.id.usercontact);
String userContactString = usercontact.getText().toString();
EditText useremail = (EditText) findViewById(R.id.useremail);
String userEmailString = useremail.getText().toString();
String OrderSummary = getString(R.string.username) + ": " + usernameString;
OrderSummary += "\n" + getString(R.string.ContactNumber) + " " + userContactString;
OrderSummary += "\n" + getString(R.string.eAddress) + " " + userEmailString;
OrderSummary += "\n" + getString(R.string.AddedWhippedCream) + " " + hasWhippedCream;
OrderSummary += "\n" + getString(R.string.AddedChocolate) + " " + hasChocolate;
OrderSummary += "\n" + getString(R.string.quantity) + ": " + quantity;
OrderSummary += "\n" + getString(R.string.totalprice) + finalPrice;
OrderSummary += "\n" + getString(R.string.thankyou);
return OrderSummary;
}
/**
* This method displays the given quantity value on the screen.
*/
public void displayQuantity(int number) {
TextView quantityTextView = (TextView) findViewById(
R.id.quantity_text_view);
quantityTextView.setText(String.format("%d", number));
}
/**
* This method displays the given text on the screen.
*/
public void displayMessage(String message) {
TextView orderSummaryTextView = (TextView) findViewById(R.id.order_summary_text_view);
orderSummaryTextView.setText(message);
}
}
下面是MainFragment.java类文件
package com.example.android.coffeeshop5profile;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class MainFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
setHasOptionsMenu(true);
setMenuVisibility(false);
return rootView;
}
}
以下是Activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/main_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/blue_grey_700"
android:orientation="vertical"
android:weightSum="4"
tools:context=".legacy.MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="3"
android:gravity="center_vertical"
android:orientation="vertical">
<ImageView
android:id="@+id/google_icon"
android:layout_width="48dp"
android:layout_height="48dp"
android:layout_gravity="center"
android:layout_marginBottom="10dp"
android:contentDescription="@string/desc_google_icon"
android:src="@drawable/googleg_color" />
<TextView
android:id="@+id/title_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:layout_gravity="center"
android:text="@string/title_text"
android:textColor="@android:color/white"
android:textSize="36sp" />
<TextView
android:id="@+id/status"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="@string/signed_out"
android:textColor="@android:color/white"
android:textSize="14sp" />
<TextView
android:id="@+id/detail"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fadeScrollbars="true"
android:gravity="center"
android:maxLines="5"
android:padding="10dp"
android:scrollbars="vertical"
android:textColor="@android:color/white"
android:textSize="14sp" />
</LinearLayout>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="@color/blue_grey_900">
<com.google.android.gms.common.SignInButton
android:id="@+id/sign_in_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:visibility="visible"
tools:visibility="gone" />
<LinearLayout
android:id="@+id/sign_out_and_disconnect"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:orientation="horizontal"
android:paddingLeft="16dp"
android:paddingRight="16dp"
android:visibility="gone"
tools:visibility="visible">
<Button
android:id="@+id/sign_out_button"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/sign_out"
android:theme="@style/ThemeOverlay.MyDarkButton" />
<Button
android:id="@+id/disconnect_button"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/disconnect"
android:theme="@style/ThemeOverlay.MyDarkButton" />
<Button
android:id="@+id/secondpage"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="@string/secondpage"
android:theme="@style/ThemeOverlay.MyDarkButton" />
</LinearLayout>
</RelativeLayout>
</LinearLayout>
下面是res / menu / context_main_menu.xml文件
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="@+id/context_menu"
android:title="@string/context_menu"
android:icon="@drawable/btn_add"
android:orderInCategory="100"
app:showAsAction="always" />
</menu>
...遗憾的是，已达到30000个字符的限制，所以我无法上传mainActivity.java文件！
请帮忙！ 最好的祝福， Sagar的
答案 0 :(得分：0)
在
上试试这段代码更改以下代码
onMenuItemClick(MenuItem item)
到
onMenuItemClick(View clickedView, int position)
`@override
public void onMenuItemClick(View clickedView, int position) {
switch (position) {
case 1:
startActivity(new Intent(MainActivity.this, UserProfile.class));
break;
case 2:
startActivity(new Intent(MainActivity.this, UserProfile.class));
break;
}
}`
我希望这可以帮到你