不幸的是我的应用程序已停止在Android模拟器中

Question

我是Android应用程序的新手。我在使用phonegap的混合环境中开发了语音识别应用程序。我的应用程序之前运行过，但现在如果我运行相同的编码，它会显示一条消息，因为不幸的是myapp已停止。

请帮我解决这个问题。

我的 MainActivity.java 编码：

    package com.example.scheduler;
    import java.util.ArrayList;
    import android.app.Activity;
    import android.content.ActivityNotFoundException;
    import android.content.Intent;
    import android.os.Bundle;
    import android.speech.RecognizerIntent;
    import android.view.Menu;
    import android.view.View;
    import android.widget.EditText;
    import android.widget.ImageButton;
    import android.widget.TextView;
    import android.widget.Toast;
    import android.R.*;
    import com.phonegap.*;

public class MainActivity extends DroidGap {

    protected static final int RESULT_SPEECH = 1;

    private ImageButton btnSpeak;
    private TextView textView1;
    private ImageButton btnSpeak1;
    public EditText editText1; 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        super.loadUrl("file:///android_asset/www/index.html"); 
        textView1 = (TextView) findViewById(R.id.textView1);

        btnSpeak = (ImageButton) findViewById(R.id.btnSpeak);

        btnSpeak.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

                Intent intent = new Intent(
                        RecognizerIntent.ACTION_RECOGNIZE_SPEECH);

                intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, "en-US");

                try {
                    startActivityForResult(intent, RESULT_SPEECH);
                    textView1.setText("");
                } catch (ActivityNotFoundException a) {
                    Toast t = Toast.makeText(getApplicationContext(),
                            "Opps! Your device doesn't support Speech to Text",
                            Toast.LENGTH_SHORT);
                    t.show();
                }
            }
        });

    }

   @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        switch (requestCode) {
        case RESULT_SPEECH: {
            if (resultCode == RESULT_OK && null != data) {

                ArrayList<String> text = data
                        .getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);

                textView1.setText(text.get(0));
            }
            break;
        }

        }
    }
}

Activitymain.xml 编码：

<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="com.example.scheduler.MainActivity" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="5dp"
        android:text="Scheduling Aid System"
        android:textAppearance="?android:attr/textAppearanceMedium" />

<ImageButton
    android:id="@+id/btnSpeak1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/textView1"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="40dp"
    android:src="@drawable/ic_images1" />

<ImageButton
    android:id="@+id/btnSpeak"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_below="@+id/btnSpeak1"
    android:layout_margin="10dp"
    android:layout_marginTop="19dp"
    android:contentDescription="@string/app_name"
    android:maxHeight="@dimen/abc_action_bar_progress_bar_size"
    android:src="@drawable/ic_images2" />

<EditText
    android:id="@+id/editText1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/btnSpeak"
    android:layout_alignParentBottom="true"
    android:layout_alignRight="@+id/btnSpeak"
    android:inputType="text"
    android:ems="10" >

    <requestFocus />
</EditText>

</RelativeLayout>

Android清单文件：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.scheduler"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="21" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

记录猫：

我的logcat中没有任何东西。