java - 创建操作栏时出现问题 "Caused by: java.lang.ClassNotFoundException: android.view.Item"

Question

我的 Android 应用程序出现以下错误:http://goo.gl/JYva5p + http://goo.gl/UuhepQ (无法将所有内容合二为一，Eclipse 不让我复制错误消息)

这是我的代码:

package com.jamco.apps.mikey;

import java.util.ArrayList;
import java.util.Calendar;
import java.util.HashMap;
import java.util.Locale;
import java.util.Random;

import zh.wang.android.apis.yweathergetter4a.WeatherInfo;
import zh.wang.android.apis.yweathergetter4a.YahooWeather;
import zh.wang.android.apis.yweathergetter4a.YahooWeather.SEARCH_MODE;
import zh.wang.android.apis.yweathergetter4a.YahooWeatherInfoListener;

import com.jamco.apps.mikey.R;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.speech.RecognitionListener;
import android.speech.RecognizerIntent;
import android.speech.tts.TextToSpeech;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.Toast;

public class Mikey extends Activity implements RecognitionListener, OnClickListener, TextToSpeech.OnInitListener, YahooWeatherInfoListener {

protected static final int REQUEST_OK = 1;
private ImageButton btn;
private static TextToSpeech tts;
private Button txt;
private Button txt2;
private ArrayList<String> thingsYouSaid = new ArrayList<String>();
private Integer numberOfThingsSaid = 0;

private Calendar c;
private String loc;

private Boolean askingQuestion = false;
private String questionResult = "";
private String question;
volatile Boolean waitingToSpeak = false;

private YahooWeather mYahooWeather = YahooWeather.getInstance();

private String name = "";

HashMap<String, String> conversation = new HashMap<String, String>();

@Override
public void onDestroy() {
    //Don't forget to shutdown tts!
    if (tts != null) {
        tts.stop();
        tts.shutdown();
    }
    super.onDestroy();
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_mikey);

    btn = (ImageButton) findViewById(R.id.imageButton1);
    txt = (Button) findViewById(R.id.textView1);
    txt2 = (Button) findViewById(R.id.textView2);

    tts = new TextToSpeech(this, this);

    btn.setOnClickListener(this);
    tts.setPitch(2f);
    tts.setSpeechRate(3f);

    txt2.setVisibility(1);
    txt2.setVisibility(View.GONE);
}

@Override
public void onClick(View v) {
    Intent i = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
        i.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, "en-US");
            try {
                startActivityForResult(i, REQUEST_OK);
            } catch (Exception e) {
                Toast.makeText(this, "Error initializing speech to text engine.", Toast.LENGTH_LONG).show();
            }
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode==REQUEST_OK  && resultCode==RESULT_OK) {
            if (!askingQuestion) {
                numberOfThingsSaid += 1;
                ArrayList<String> youJustSaid = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
                txt.setText("You said: \n" + youJustSaid.get(0));
                thingsYouSaid.add(youJustSaid.get(0));
                think();
            } else {

            }
        }
    }

@Override
public void onInit(int status) {
    if (status == TextToSpeech.SUCCESS) {

        int result = tts.setLanguage(Locale.UK);

        if (result == TextToSpeech.LANG_MISSING_DATA || result == TextToSpeech.LANG_NOT_SUPPORTED) {
            Log.e("TTS", "This Language is not supported");
        } else {
            btn.setEnabled(true);
        }

    } else {
        Log.e("TTS", "Initilization Failed!");
    }
}

@Override
public void onBeginningOfSpeech() {
    //TODO Auto-generated method stub

}

@Override
public void onBufferReceived(byte[] buffer) {
 // TODO Auto-generated method stub

}

@Override
public void onEndOfSpeech() {
 // TODO Auto-generated method stub

}

@Override
public void onError(int error) {
 // TODO Auto-generated method stub

}

@Override
public void onEvent(int eventType, Bundle params) {
 // TODO Auto-generated method stub

}

@Override
public void onPartialResults(Bundle partialResults) {
 // TODO Auto-generated method stub

}

@Override
public void onReadyForSpeech(Bundle params) {
 // TODO Auto-generated method stub

}

@Override
public void onResults(Bundle results) {
 // TODO Auto-generated method stub

}

@Override
public void onRmsChanged(float rmsdB) {
 // TODO Auto-generated method stub

}

public void speak(String speech) {
    if (!askingQuestion) {
        if (!tts.isSpeaking()) {
            txt2.setVisibility(View.VISIBLE);
            tts.speak(speech, TextToSpeech.QUEUE_FLUSH, null);
            txt2.setText("I said: \n" + speech);
        } else {
            waitingToSpeak = true;
            while (waitingToSpeak){
                if (!tts.isSpeaking()) {
                    waitingToSpeak = false;
                }
            }
            speak(speech);
        }
    } else {
        waitingToSpeak = true;
        while (waitingToSpeak){
            if (!askingQuestion) {
                waitingToSpeak = false;
            }
        }
        speak(speech);
    }
}

private void think() {
    if (last().contains("hello") || last().contains("hi")) {
        switch (randInt(0, 2)) {
            case 0:
                speak("Hi");
                break;
            case 1:
                speak("Hello");
                break;
            case 2:
                speak(last());
                break;
        }
    } else if (last().contains("time") && (last().contains("what") || last().contains("tell")) && !last().contains("in")) {
        c = Calendar.getInstance();
        speak("The time is currently " + c.get(Calendar.MINUTE) + " minutes past " + c.get(Calendar.HOUR) + " and " + c.get(Calendar.SECOND) + " seconds.");
    } else if (last().contains("time") && (last().contains("what") || last().contains("tell")) && last().contains("in")) {
        //  Tell time in <Place>
    } else if (last().contains("weather") && last().contains("what") && (!last().contains("in") || !last().contains("at"))) {
        mYahooWeather.setSearchMode(SEARCH_MODE.GPS);
        mYahooWeather.queryYahooWeatherByGPS(getApplicationContext(), this);
    } else if (last().contains("weather") && last().contains("what") && (last().contains("in") || last().contains("at"))) {
        loc = last().substring(last().lastIndexOf("in"), last().length());
        mYahooWeather.setSearchMode(SEARCH_MODE.PLACE_NAME);
        mYahooWeather.queryYahooWeatherByPlaceName(getApplicationContext(), loc, this);
    } else if (last().contains("*") || last().contains("-") || last().contains("+") || last().contains("plus") || last().contains("root") || last().contains("cubed") || last().contains("squared") || last().contains("times") || last().contains("multiplied") || last().contains("divided") || last().contains("add") || last().contains("subtract") || last().contains("minus") || last().contains("takeaway") || last().contains("added") || last().contains("power")) {
        //It's a math sum!
        speak("Sorry, I can't do maths yet.");

        //if (last().contains("plus") || last().contains("add") || last().contains("added") || last().contains("+")) {
        //  if (last().contains("plus") || last().contains("add") || last().contains("+")) {
        //      
        //  }
        //}
    } else if (last().contains("what") || last().contains("your") || last().contains("name")) {
        if (name == "") {
            askingQuestion = true;
            speak("Hello " + askQuestion("My name is Mikey. \n What's your name?"));
            btn.setEnabled(true);
        } else {
            speak("My name is Mikey. \n Your name is " + name);
        }

    } else if (last().contains("what") || last().contains("my") || last().contains("name")) {
        if (name == "") {
            speak("Hello " + askQuestion("I don't know your name. \n What is your name?"));
        }
    }
}

public String askQuestion(String msg) {
    btn.setEnabled(false);
    tts.speak(msg, TextToSpeech.QUEUE_FLUSH, null);
    Toast.makeText(this, msg, Toast.LENGTH_LONG).show();
    conversation.put(msg, "");
    question = msg;
    String string = "";
    return string;
}

public void questionResult(String result) {
    conversation.put(question, result);
}

public String last() {
    return thingsYouSaid.get(numberOfThingsSaid - 1).toLowerCase(Locale.UK);
}

public static int randInt(int min, int max) {

//  Usually this can be a field rather than a method variable
    Random rand = new Random();

//  nextInt is normally exclusive of the top value,
//  so add 1 to make it inclusive
    int randomNum = rand.nextInt((max - min) + 1) + min;

    return randomNum;
}

@Override
public void gotWeatherInfo(WeatherInfo weatherInfo) {
    speak("The weather is currently " + weatherInfo.getCurrentText() + " in " + weatherInfo.getLocationCity() +", with a temperature of around " + weatherInfo.getCurrentTempC() + " degrees centigrade.");
}

public void repeatLast() {
    speak("I said, " + thingsYouSaid.get(numberOfThingsSaid - 2).toLowerCase(Locale.UK));
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.mikey, menu);

    return super.onCreateOptionsMenu(menu);
}
}

(抱歉格式错误)

这是我的 Activity XML:

<RelativeLayout 
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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".Mikey"
android:configChanges="orientation"
android:screenOrientation="portrait">

<!-- Settings, should always be in the overflow -->
<Item android:id="@+id/action_settings"
      android:title="@string/action_settings"
      android:showAsAction="never" />

<ImageButton
    android:id="@+id/imageButton1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_centerHorizontal="true"
    android:layout_marginBottom="42dp"
    android:src="@drawable/ic_launcher" />

<Button
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:layout_alignParentTop="true"
    android:layout_marginTop="39dp"
    android:background="@drawable/box1"
    android:maxWidth="240dp"
    android:text="Click the Microphone and speak!"
    android:textSize="18sp" />

<Button
    android:id="@+id/textView2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_below="@+id/textView1"
    android:layout_marginTop="73dp"
    android:background="@drawable/box2"
    android:maxWidth="240dp"
    android:textSize="18sp" />

</RelativeLayout>

我的问题是，简而言之，我无法将项目添加到操作栏!编译器不知道 XML 中的“项目”是什么，我也不知道为什么(这是我能说的，我可能是错的)。我遵循的所有教程都告诉我操作栏包含在 API 版本 11 或更高版本的主题“Holo”中，我已将其用于我的应用程序。

如果您需要更多信息，请向我询问。

提前致谢!

编辑:此外，我在官方 Android Dev 之后将“android-support-v4.jar”作为库包含在我的应用程序中。操作栏的教程，尽管其他网站没有告诉我这样做。

Answer 1

您的 ActionBar 菜单不是您的 Activity 布局的一部分。删除布局中的 和

声明

<!-- Settings, should always be in the overflow -->
<Item 
    android:id="@+id/action_settings"
    android:title="@string/action_settings"
    android:showAsAction="never" />

在菜单中有这样的东西......

<menu xmlns:android="http://schemas.android.com/apk/res/android" >
    <item
        android:id="@+id/action_settings"
        android:orderInCategory="100"
        android:showAsAction="never"
        android:title="@string/action_settings"/>
</menu>

在 res/menu 文件夹中创建一个名为 main.xml 的 xml 文件(实际上它可以是任何名称)并编写此代码。

并将此代码添加到您的Activity

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

要处理此设置菜单的点击事件，请在您的 Activity 中添加以下代码...

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    super.onOptionsItemSelected(item);
    switch (item.getItemId()) {
    case R.id.action_settings:
        // Settings in ActionBar clicked
        // start your Activity here
        break;

    default:
        break;
    }
    return true;
}