先看效果

 

扫描内容是下面这张，二维码是用zxing库生成的

 

由于改了好几个类，还是去年的事都忘得差不多了，所以只能上这个类的代码了，主要就是改了这个CaptureActivity.java

 

package com.zxing.activity;import java.io.IOException;import java.util.Vector;import android.app.Activity;import android.content.Intent;import android.content.res.AssetFileDescriptor;import android.graphics.Bitmap;import android.media.AudioManager;import android.media.MediaPlayer;import android.media.MediaPlayer.OnCompletionListener;import android.os.Handler;import android.os.Vibrator;import android.view.SurfaceHolder;import android.view.SurfaceHolder.Callback;import android.view.SurfaceView;import android.widget.Toast;import com.ericssonlabs.R;import com.google.zxing.BarcodeFormat;import com.google.zxing.Result;import com.zxing.camera.CameraManager;import com.zxing.decoding.CaptureActivityHandler;import com.zxing.decoding.CaptureActivityHandler.DecodeCallback;import com.zxing.decoding.InactivityTimer;import com.zxing.view.ViewfinderView;/** * Initial the camera * @author Ryan.Tang * @modifier Lemon * @use extends CaptureActivity并且在setContentView方法后调用init方法 */public abstract class CaptureActivity extends Activity implements Callback, DecodeCallback {	//	private static final String TAG = "CaptureActivity";	protected Activity context;	protected SurfaceView surfaceView;	protected ViewfinderView viewfinderView;	/**初始化，必须在setContentView之后	 * @param context	 * @param viewfinderView	 */	protected void init(Activity context, SurfaceView surfaceView, ViewfinderView viewfinderView) {		this.context = context;		this.surfaceView = surfaceView;		this.viewfinderView = viewfinderView;		CameraManager.init(getApplication());		hasSurface = false;		inactivityTimer = new InactivityTimer(this);	}	private CaptureActivityHandler handler;	private boolean hasSurface;	private Vector
    
      decodeFormats;	private String characterSet;	private InactivityTimer inactivityTimer;	private MediaPlayer mediaPlayer;	private boolean playBeep;	private static final float BEEP_VOLUME = 0.10f;	private boolean vibrate;	@Override	protected void onResume() {		super.onResume();		SurfaceHolder surfaceHolder = surfaceView.getHolder();		if (hasSurface) {			initCamera(surfaceHolder);		} else {			surfaceHolder.addCallback(this);			surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);		}		decodeFormats = null;		characterSet = null;		playBeep = true;		AudioManager audioService = (AudioManager) getSystemService(AUDIO_SERVICE);		if (audioService.getRingerMode() != AudioManager.RINGER_MODE_NORMAL) {			playBeep = false;		}		initBeepSound();		vibrate = true;	}	@Override	protected void onPause() {		super.onPause();		if (handler != null) {			handler.quitSynchronously();			handler = null;		}		CameraManager.get().closeDriver();	}	@Override	protected void onDestroy() {		inactivityTimer.shutdown();		super.onDestroy();	}	public static final String RESULT_QRCODE_STRING = "RESULT_QRCODE_STRING";	/**	 * Handler scan result	 * @param result	 * @param barcode	 */	public void handleDecode(Result result, Bitmap barcode) {		inactivityTimer.onActivity();		playBeepSoundAndVibrate();		String resultString = result.getText();		//FIXME		if (resultString.equals("")) {			Toast.makeText(CaptureActivity.this, "Scan failed!", Toast.LENGTH_SHORT).show();		}		setResult(RESULT_OK, new Intent().putExtra(RESULT_QRCODE_STRING, resultString));		finish();	}	private void initCamera(SurfaceHolder surfaceHolder) {		try {			CameraManager.get().openDriver(surfaceHolder);		} catch (IOException ioe) {			return;		} catch (RuntimeException e) {			return;		}		if (handler == null) {			handler = new CaptureActivityHandler(this, decodeFormats,					characterSet, viewfinderView, this);		}	}	@Override	public void drawViewfinder() {		viewfinderView.drawViewfinder();			}	@Override	public void surfaceChanged(SurfaceHolder holder, int format, int width,			int height) {	}	@Override	public void surfaceCreated(SurfaceHolder holder) {		if (!hasSurface) {			hasSurface = true;			initCamera(holder);		}	}	@Override	public void surfaceDestroyed(SurfaceHolder holder) {		hasSurface = false;	}	public Handler getHandler() {		return handler;	}	private void initBeepSound() {		if (playBeep && mediaPlayer == null) {			// The volume on STREAM_SYSTEM is not adjustable, and users found it			// too loud,			// so we now play on the music stream.			setVolumeControlStream(AudioManager.STREAM_MUSIC);			mediaPlayer = new MediaPlayer();			mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);			mediaPlayer.setOnCompletionListener(beepListener);			AssetFileDescriptor file = getResources().openRawResourceFd(					R.raw.beep);			try {				mediaPlayer.setDataSource(file.getFileDescriptor(),						file.getStartOffset(), file.getLength());				file.close();				mediaPlayer.setVolume(BEEP_VOLUME, BEEP_VOLUME);				mediaPlayer.prepare();			} catch (IOException e) {				mediaPlayer = null;			}		}	}	private static final long VIBRATE_DURATION = 200L;	private void playBeepSoundAndVibrate() {		if (playBeep && mediaPlayer != null) {			mediaPlayer.start();		}		if (vibrate) {			Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);			vibrator.vibrate(VIBRATE_DURATION);		}	}	/**	 * When the beep has finished playing, rewind to queue up another one.	 */	private final OnCompletionListener beepListener = new OnCompletionListener() {		public void onCompletion(MediaPlayer mediaPlayer) {			mediaPlayer.seekTo(0);		}	};}
    

使用方法： 新建一个Activity继承CaptureActivity并且在setContentView方法后调用init方法即可。

示例：

CameraScanActivity.java

package zuo.biao.activity;import zuo.biao.R;import zuo.biao.library.interfaces.OnBottomDragListener;import zuo.biao.util.ActivityUtil;import android.content.Context;import android.content.Intent;import android.os.Bundle;import android.view.SurfaceHolder.Callback;import android.view.SurfaceView;import android.view.View;import android.view.View.OnClickListener;import com.zxing.activity.CaptureActivity;import com.zxing.camera.CameraManager;import com.zxing.view.ViewfinderView;/**扫描二维码Activity * @author Lemon * @use 参考zuo.biao.library.ModelActivity */public class CameraScanActivity extends CaptureActivity implements Callback, OnClickListener, OnBottomDragListener {	public static final String TAG = ActivityUtil.TAG_CAMERA_SCAN_ACTIVITY;	//启动方法<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<	/**启动这个Activity的Intent	 * @param context	 * @param title	 * @return	 */	public static Intent createIntent(Context context) {		return new Intent(context, CameraScanActivity.class);	}	//启动方法>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.camera_scan_activity);		init(this, (SurfaceView) findViewById(R.id.svCameraScan), (ViewfinderView) findViewById(R.id.vfvCameraScan));		//功能归类分区方法，必须调用<<<<<<<<<<		initView();		initData();		initListener();		//功能归类分区方法，必须调用>>>>>>>>>>	}	//UI显示区(操作UI，但不存在数据获取或处理代码，也不存在事件监听代码)<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<	public void initView() {//必须调用	}	//UI显示区(操作UI，但不存在数据获取或处理代码，也不存在事件监听代码)>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>	//data数据区(存在数据获取或处理代码，但不存在事件监听代码)<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<	public void initData() {//必须调用	}	//data数据区(存在数据获取或处理代码，但不存在事件监听代码)>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>	//listener事件监听区(只要存在事件监听代码就是)<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<	public void initListener() {//必须调用		findViewById(R.id.tvCameraScanReturn).setOnClickListener(this);		findViewById(R.id.ivCameraScanReturn).setOnClickListener(this);		findViewById(R.id.ivCameraScanLight).setOnClickListener(this);		findViewById(R.id.ivCameraScanMyQRCode).setOnClickListener(this);	}	//系统自带监听方法<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<	@Override	public void onDragBottom(boolean rightToLeft) {		if (rightToLeft) {			return;		}		finish();	}	@Override	public void onClick(View v) {		switch (v.getId()) {		case R.id.tvCameraScanReturn:		case R.id.ivCameraScanReturn:			onDragBottom(false);			break;		case R.id.ivCameraScanLight:			switchLight(! isOpen);			break;		case R.id.ivCameraScanMyQRCode:			//			break;		default:			break;		}	}	private boolean isOpen = false;	/**打开或关闭闪关灯	 * @param open	 */	private void switchLight(boolean open) {		if (open == isOpen) {			return;		}		isOpen = CameraManager.get().switchLight(open);	}	//类相关监听<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<	//类相关监听>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>	//系统自带监听方法>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>	//listener事件监听区(只要存在事件监听代码就是)>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>	//内部类,尽量少用<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<	//内部类,尽量少用>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>}

CameraScanActivity布局文件camera_scan_activity.xml

布局文件因为使用了ZBLibrary中的一些style，color等，只有这个layout的话会出现一些错误。自己新建一个layout文件并把ViewfinderView放到最外层布局文件内就行了。当然下载好下面附上的源码就没这问题了。

对了，记得在AndroidManifest.xml中加上这些权限：

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

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

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

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

 

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