我正在使用 Biggu 条形码库。
打包的库已经列出了使用演示和示例应用程序的所有内容。
但我没有找到类定义错误
java.lang.NoClassDefFoundError: com.biggu.scannerdemo.ScannerActivity
但是该类在包中,并且清单文件列出了所有活动。构建路径biggu_scanner-1.1.0.jar
在其路径中有文件。
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;
}
}
安卓清单文件
<?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" />
尝试一切设置正确谁能让我知道代码中可能有什么问题。期待您的回复。谢谢。