我正在尝试将 ZXing QR Code 集成到我的 android 应用程序中而不安装 BarCode Scanner 应用程序，我已按照以下步骤操作：
1) 首先我下载了 ZXing.zip 文件并解压
2）将ZXing项目作为android现有项目打开，然后转到android文件夹并打开android文件夹并将core.jar文件包含到名为CaptureActivity的ZXing项目中。
3）我在名为“QRCodeSample”的项目中使用了 CaptureActivity 项目作为库。（将 CaptureActivity 作为库包含的问题）
4）我的代码如下3：
public class QRCodeSampleActivity extends Activity {
Button b1;
static String contents;
public static final int REQUEST_CODE = 1;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
b1 = (Button) findViewById(R.id.button1);
b1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
/*Intent intent = new Intent("com.google.zxing.client.android.SCAN");
intent.putExtra("com.google.zxing.client.android.SCAN.SCAN_MODE",
"QR_CODE_MODE");
startActivityForResult(intent, 0);*/
Intent intent = new Intent("com.google.zxing.client.android.SCAN");
intent.putExtra("SCAN_MODE", "QR_CODE_MODE");
startActivityForResult(intent, 0);
}
});
}
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
if (requestCode == 0) {
if (resultCode == RESULT_OK) {
contents = intent.getStringExtra("SCAN_RESULT");
String format = intent.getStringExtra("SCAN_RESULT_FORMAT");
Log.i("Barcode Result", contents);
Intent i1 = new Intent(QRCodeSampleActivity.this, webclass.class);
startActivity(i1);
// Handle successful scan
} else if (resultCode == RESULT_CANCELED) {
// Handle cancel
Log.i("Barcode Result","Result canceled");
}
}
}
}
清单文件是：
<uses-permission android:name="android.permission.CAMERA"/>
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<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="android.intent.action.MAIN"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
<intent-filter>
<action android:name="com.google.zxing.client.android.SCAN"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</activity>
<activity
android:label="@string/app_name"
android:name=".QRCodeSampleActivity" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".webclass"></activity>
</application>
</manifest>
它也没有添加库
当我尝试运行我的项目时，错误消息是：
Unable to instantiate activity ComponentInfo{com.qr.code/com.qr.code}: java.lang.ClassNotFoundException: com.qr.code in loader dalvik.system.PathClassLoader[/data/app/com.qr.code-1.apk]