我试图在我的Android应用程序上安装条形码。当我调用条形码时，我的应用程序崩溃，我得到以下日志。请帮助我。提前谢谢。
06-19 16:50:45.913: W/dalvikvm(21407): threadid=1: thread exiting with uncaught exception (group=0x2b542210)
06-19 16:50:45.953: E/AndroidRuntime(21407): FATAL EXCEPTION: main
06-19 16:50:45.953: E/AndroidRuntime(21407): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.crosslegged/com.google.zxing.client.android.CaptureActivity}: java.lang.ClassNotFoundException: com.google.zxing.client.android.CaptureActivity
06-19 16:50:45.953: E/AndroidRuntime(21407): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1891)
06-19 16:50:45.953: E/AndroidRuntime(21407): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1992)
06-19 16:50:45.953: E/AndroidRuntime(21407): at android.app.ActivityThread.access$600(ActivityThread.java:127)
06-19 16:50:45.953: E/AndroidRuntime(21407): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1158)
06-19 16:50:45.953: E/AndroidRuntime(21407): at android.os.Handler.dispatchMessage(Handler.java:99)
06-19 16:50:45.953: E/AndroidRuntime(21407): at android.os.Looper.loop(Looper.java:137)
06-19 16:50:45.953: E/AndroidRuntime(21407): at android.app.ActivityThread.main(ActivityThread.java:4441)
06-19 16:50:45.953: E/AndroidRuntime(21407): at java.lang.reflect.Method.invokeNative(Native Method)
06-19 16:50:45.953: E/AndroidRuntime(21407): at java.lang.reflect.Method.invoke(Method.java:511)
06-19 16:50:45.953: E/AndroidRuntime(21407): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
06-19 16:50:45.953: E/AndroidRuntime(21407): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
06-19 16:50:45.953: E/AndroidRuntime(21407): at dalvik.system.NativeStart.main(Native Method)
06-19 16:50:45.953: E/AndroidRuntime(21407): Caused by: java.lang.ClassNotFoundException: com.google.zxing.client.android.CaptureActivity
06-19 16:50:45.953: E/AndroidRuntime(21407): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
06-19 16:50:45.953: E/AndroidRuntime(21407): at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
06-19 16:50:45.953: E/AndroidRuntime(21407): at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
06-19 16:50:45.953: E/AndroidRuntime(21407): at android.app.Instrumentation.newActivity(Instrumentation.java:1023)
06-19 16:50:45.953: E/AndroidRuntime(21407): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1882)
06-19 16:50:45.953: E/AndroidRuntime(21407): ... 11 more
06-19 16:50:48.013: I/Process(21407): Sending signal. PID: 21407 SIG: 9
这是AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.crosslegged"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<supports-screens
android:largeScreens="true"
android:normalScreens="true"
android:smallScreens="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.WRITE_EXTERNAL_STORAGE" />
<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.READ_PHONE_STATE" />
<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.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.CAMERA" />
<uses-permission android:name="android.permission.FLASHLIGHT" />
<uses-feature android:name="android.hardware.camera" android:required="false"/>
<uses-feature android:name="android.hardware.camera.front" android:required="false"/>
<uses-feature android:name="android.hardware.camera.autofocus" android:required="false"/>
<uses-feature android:name="android.hardware.camera.flash" android:required="false"/>
<application
android:installLocation="auto"
android:debuggable="true"
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.crosslegged.MainActivity"
android:configChanges="orientation|keyboardHidden"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<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"
android:exported="false">
<intent-filter>
<action android:name="com.phonegap.plugins.barcodescanner.SCAN"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</activity>
</application>
</manifest>
这是index.html
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=UTF-8" />
<meta name="viewport" content="initial-scale=1.0, maximum-scale=1.0, user-scalable=no, width=device-width">
<title>My Barcode/QR Code Scanner</title>
<style>
body{
background:#888888 none repeat scroll 0 0;
}
input[type='text']{
width:18em;
border:1px solid black;
}
input[type='button']{
width:20em;
border:1px solid black;
color:#ffffff;
font-family:"Times New Roman",Times,serif;
font-size:0.9em;
font-weight:bold;
background:#737CA1;
}
</style>
<script type="text/javascript" src="cordova-2.7.0.js"></script>
<script type="text/javascript" src="barcodescanner.js"></script>
<script type="text/javascript">
function scanCode(){
window.plugins.barcodeScanner.scan(
function(result){
alert("Scanned Code: " + result.text
+ ". Format: " + result.format
+ ". Cancelled: " + result.cancelled);
},
function(error){
alert("Scan failed: " + error);
}
);
}
function encodeData(){
var data = document.getElementById("data").value;
if (data != ''){
window.plugins.barcodeScanner.encode(
BarcodeScanner.Encode.TEXT_TYPE, data,
function(success){
alert("Encode success: " + success);
},
function(fail){
alert("Encoding failed: " + fail);
}
);
}
else{
alert("Please enter some data.");
return false;
}
}
</script>
</head>
<body>
<h3>Barcode/QR Code Scanner And Encoder</h3>
<input type="button" value="Scan Code" onclick="scanCode();"/><br/><br/>
Data : <br/>
<input type="text" name="data" id="data" /><br/><br/>
<input type="button" value="Encode Data" onclick="encodeData();"/>
</body>
答案 0 :(得分：0)
Unable to instantiate activity ComponentInfo{com.example.crosslegged/com.google.zxing.client.android.CaptureActivity}: java.lang.ClassNotFoundException: com.google.zxing.client.android.CaptureActivity
应用程序活动路径搞砸了，CaptureActivity.java不存在或者Manifest中的路径不正确。
使用两个应用程序名称空间也没有意义。
com.example.crosslegged
和
com.google.zxing.client.android.CaptureActivity
活动路径应为：
com.example.crosslegged/ActivityA
com.example.crosslegged/ActivityB
依旧......