Question

我正在使用Biggu条形码库。

使用演示和示例应用程序列出了打包的库。

但是我没有找到类定义错误

     java.lang.NoClassDefFoundError: com.biggu.scannerdemo.ScannerActivity

但是类在包和清单文件中列出了所有活动。构建路径在其路径中包含biggu_scanner-1.1.0.jar文件。

package com.biggu.scannerdemo;

import com.biggu.barcodescanner.client.android.Intents;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class Demo extends Activity {

private static final int SCANNER_REQUEST_CODE = 0;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    Button button = (Button)findViewById(R.id.btn);
    button.setOnClickListener(new OnClickListener() {

        public void onClick(View v) {

            Intent intent = new Intent(v.getContext(), com.biggu.scannerdemo.ScannerActivity.class);
            intent.putExtra(Intents.Preferences.ENABLE_BEEP, true);
            intent.putExtra(Intents.Preferences.ENABLE_VIBRATE, true);

            ((Activity)v.getContext()).startActivityForResult(intent, SCANNER_REQUEST_CODE);
        }
    });
}

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {

    if (resultCode == Activity.RESULT_OK && requestCode == SCANNER_REQUEST_CODE) {

        Bundle extras = data.getExtras();
        String result = extras.getString("SCAN_RESULT");
        TextView textView = (TextView)findViewById(R.id.txt);
        textView.setText(result);
    }
}}

ScannerActivity具有以下代码

package com.biggu.scannerdemo;

import com.biggu.barcodescanner.client.android.CaptureActivity;

public class ScannerActivity extends CaptureActivity {

@Override
public int get_R_id_preview_view() {

    return R.id.preview_view;
}

@Override
public int get_R_id_viewfinder_view() {

    return R.id.viewfinder_view;
}

@Override
public int get_R_layout_scanner() {

    return R.layout.scanner;
}

@Override
public int get_R_raw_beep() {

    return R.raw.beep;
}
}

Android清单文件

<?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="com.biggu.scannerdemo"
  android:versionCode="1"
  android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
    <activity android:name=".Demo"
              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=".ScannerActivity"
        android:label="Scanner Activity" android:screenOrientation="landscape"
        android:configChanges="orientation|keyboardHidden" android:theme="@android:style/Theme.NoTitleBar.Fullscreen">
    </activity>

</application>
<uses-sdk android:minSdkVersion="4" />

<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.FLASHLIGHT" />

尝试了一切正确的方法任何人都可以让我知道代码中可能出现的问题。期待你的回复。谢谢。

Answer 1

您必须确保在构建APK时导出lib。

在项目属性中＆gt; Java构建路径＆gt;订单和出口=＆gt;检查你的lib

Answer 2

您需要在项目首选项中添加库。

Android条形码扫描仪

2 个答案: