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我扫描条形码的应用程序工作正常，但是当我在扫描时按下菜单按钮时它崩溃了。

logcat如下

05-16 20:58:56.186: E/AndroidRuntime(8240): 致命异常: main 05-16 20:58:56.186: E/AndroidRuntime(8240): android.content.ActivityNotFoundException: 找不到明确的活动类 {com .mds.mytmt3/com.google.zxing.client.android.PreferencesActivity}; 您是否在 AndroidManifest.xml 中声明了此活动？05-16 20:58:56.186: E/AndroidRuntime(8240): 在 android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1405) 05-16 20:58:56.186: E/AndroidRuntime(8240): 在 android. app.Instrumentation.execStartActivity(Instrumentation.java:1379) 05-16 20:58:56.186: E/AndroidRuntime(8240): 在 android.app.Activity.startActivityForResult(Activity.java:2827) 05-16 20:58: 56.186: E/AndroidRuntime(8240): at android.app.Activity.startActivity(Activity.java:2933) 05-16 20:58:56.186: E/AndroidRuntime(8240): at com.

我的清单文件看起来像这样

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.mds.mytmt3"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="10" />

    <supports-screens
        android:largeScreens="true"
        android:normalScreens="true"
        android:smallScreens="true"
        android:xlargeScreens="true"
        android:resizeable="true"
        android:anyDensity="true"
        />

    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.VIBRATE" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.RECEIVE_SMS" />
    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <uses-permission android:name="android.permission.RECORD_VIDEO"/>
    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
    <uses-permission android:name="android.permission.READ_CONTACTS" />
    <uses-permission android:name="android.permission.WRITE_CONTACTS" />   
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />   
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.GET_ACCOUNTS" />
    <uses-permission android:name="android.permission.BROADCAST_STICKY" />

    <uses-feature android:name="android.hardware.camera" />
    <uses-feature android:name="android.hardware.camera.autofocus" />

    <application android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity android:configChanges="orientation|keyboardHidden"
            android:name=".MyPhoneGapActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <!-- ZXing activities -->
    <activity android:name="com.google.zxing.client.android.CaptureActivity" android:screenOrientation="landscape" android:configChanges="orientation|keyboardHidden" android:theme="@android:style/Theme.NoTitleBar.Fullscreen" android:windowSoftInputMode="stateAlwaysHidden">
        <intent-filter>
        <action android:name="com.phonegap.plugins.barcodescanner.SCAN"/>
        <category android:name="android.intent.category.DEFAULT"/>
        </intent-filter>
    </activity>
    <activity android:name="com.google.zxing.client.android.encode.EncodeActivity" android:label="@string/share_name">
        <intent-filter>
        <action android:name="com.phonegap.plugins.barcodescanner.ENCODE"/>
        <category android:name="android.intent.category.DEFAULT"/>
        </intent-filter>           
    </activity>

    </application>

</manifest>

我到处搜索如何将 android.preferencesactivity 声明到清单，但我无处可去。

任何帮助表示赞赏。

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