首先看一下扫描界面
CaptureCodeActivity.java代码：
package com.haier.qr.code;import java.io.IOException;import java.io.Serializable;import java.util.Map;import java.util.Vector;import android.app.Activity;import android.app.AlertDialog;import android.content.DialogInterface;import android.content.DialogInterface.OnCancelListener;import android.content.DialogInterface.OnClickListener;import android.content.Intent;import android.graphics.Bitmap;import android.os.Bundle;import android.os.Handler;import android.text.TextUtils;import android.util.Log;import android.view.SurfaceHolder;import android.view.SurfaceHolder.Callback;import android.view.SurfaceView;import android.view.View;import android.view.Window;import android.view.WindowManager;import android.widget.Toast;import com.google.zxing.BarcodeFormat;import com.google.zxing.DecodeHintType;import com.google.zxing.Result;import com.haier.cabinet.customer.R;import com.haier.cabinet.customer.activity.DeliveryBoxListActivity;import com.haier.common.util.AppToast;import com.haier.qr.code.zxing.camera.CameraManager;import com.haier.qr.code.zxing.decoding.CaptureActivityHandler;import com.haier.qr.code.zxing.decoding.FinishListener;import com.haier.qr.code.zxing.decoding.InactivityTimer;import com.haier.qr.code.zxing.view.ViewfinderView;/** * Initial the camera * * @author jdsjlzx */public class CaptureCodeActivity extends Activity implements Callback,View.OnClickListener {private static final String TAG = CaptureCodeActivity.class.getSimpleName();private CameraManager cameraManager;private CaptureActivityHandler handler;private ViewfinderView viewfinderView;private boolean hasSurface;private Map<DecodeHintType, ?> decodeHints;private Vector<BarcodeFormat> decodeFormats;private String characterSet;private InactivityTimer inactivityTimer;private boolean isFlashlightOpen;/** * 声音震动管理器。如果扫描成功后可以播放一段音频，也可以震动提醒，可以通过配置来决定扫描成功后的行为。 */private BeepManager beepManager;/** * 闪光灯调节器。自动检测环境光线强弱并决定是否开启闪光灯 */private AmbientLightManager ambientLightManager;public CameraManager getCameraManager() {return cameraManager;}/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);Window window = getWindow();window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);setContentView(R.layout.activity_capture);hasSurface = false;inactivityTimer = new InactivityTimer(this);beepManager = new BeepManager(this);ambientLightManager = new AmbientLightManager(this);//按钮监听事件findViewById(R.id.capture_flashlight).setOnClickListener(this);}@Overrideprotected void onResume() {super.onResume();Log.d(TAG, "onResume");cameraManager = new CameraManager(getApplication());viewfinderView = (ViewfinderView) findViewById(R.id.viewfinder_view);viewfinderView.setCameraManager(cameraManager);viewfinderView.setVisibility(View.VISIBLE);SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);SurfaceHolder surfaceHolder = surfaceView.getHolder();if (hasSurface) {initCamera(surfaceHolder);} else {// 防止sdk8的设备初始化预览异常surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);// Install the callback and wait for surfaceCreated() to init the// camera.surfaceHolder.addCallback(this);}decodeFormats = null;characterSet = null;// 加载声音配置，其实在BeemManager的构造器中也会调用该方法，即在onCreate的时候会调用一次beepManager.updatePrefs();// 启动闪光灯调节器ambientLightManager.start(cameraManager);// 恢复活动监控器inactivityTimer.onResume();}@Overrideprotected void onPause() {Log.d(TAG, "onPause");if (handler != null) {handler.quitSynchronously();handler = null;}inactivityTimer.onPause();ambientLightManager.stop();beepManager.close();// 关闭摄像头cameraManager.closeDriver();if (!hasSurface) {SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);SurfaceHolder surfaceHolder = surfaceView.getHolder();surfaceHolder.removeCallback(this);}super.onPause();}@Overrideprotected void onDestroy() {inactivityTimer.shutdown();super.onDestroy();}/** * A valid barcode has been found, so give an indication of success and show * the results. * * @param rawResult *The contents of the barcode. * @param scaleFactor *amount by which thumbnail was scaled * @param barcode *A greyscale bitmap of the camera data which was decoded. */public void handleDecode(Result rawResult, Bitmap barcode, float scaleFactor) {Log.d(TAG, "handleDecode");inactivityTimer.onActivity();beepManager.playBeepSoundAndVibrate();String resultString = rawResult.getText();if (TextUtils.isEmpty(resultString)) {Toast.makeText(CaptureCodeActivity.this, "Scan failed!",Toast.LENGTH_SHORT).show();} else {//扫码完成，，处理结果（跳转到箱子列表）/*Intent resultIntent = new Intent();Bundle bundle = new Bundle();bundle.putString("result", resultString);bundle.putParcelable("bitmap", barcode);resultIntent.putExtras(bundle);this.setResult(RESULT_OK, resultIntent);*/String terminalNo = getIntent().getStringExtra("terminal_no");if (resultString.equals(terminalNo)) {AppToast.makeToast(this, "确认成功！");Intent intent = new Intent(this, DeliveryBoxListActivity.class);intent.putExtra("terminal_no", terminalNo);intent.putExtra("box_list", (Serializable) getIntent().getSerializableExtra("box_list"));startActivity(intent);CaptureCodeActivity.this.finish();} else {/*AppToast.makeToast(this, "确认失败，请重新扫描确认");*/showErrorDialog();}}}private void initCamera(SurfaceHolder surfaceHolder) {if (surfaceHolder == null) {throw new IllegalStateException("No SurfaceHolder provided");}if (cameraManager.isOpen()) {Log.w(TAG,"initCamera() while already open — late SurfaceView callback?");return;}try {cameraManager.openDriver(surfaceHolder);// Creating the handler starts the preview, which can also throw a// RuntimeException.if (handler == null) {handler = new CaptureActivityHandler(this, decodeFormats,decodeHints, characterSet, cameraManager);}} catch (IOException ioe) {Log.w(TAG, ioe);displayFrameworkBugMessageAndExit();} catch (RuntimeException e) {// Barcode Scanner has seen crashes in the wild of this variety:// java.?lang.?RuntimeException: Fail to connect to camera serviceLog.w(TAG, "Unexpected error initializing camera", e);displayFrameworkBugMessageAndExit();}}private void displayFrameworkBugMessageAndExit() {AlertDialog.Builder builder = new AlertDialog.Builder(this);builder.setTitle(getString(R.string.app_name));builder.setMessage(getString(R.string.msg_camera_framework_bug));builder.setPositiveButton(android.R.string.yes, new FinishListener(this));builder.setOnCancelListener(new FinishListener(this));builder.show();}@Overridepublic void surfaceChanged(SurfaceHolder holder, int format, int width,int height) {}@Overridepublic void surfaceCreated(SurfaceHolder holder) {if (holder == null) {Log.e(TAG,"*** WARNING *** surfaceCreated() gave us a null surface!");}if (!hasSurface) {hasSurface = true;initCamera(holder);}}@Overridepublic void surfaceDestroyed(SurfaceHolder holder) {hasSurface = false;}public ViewfinderView getViewfinderView() {return viewfinderView;}public Handler getHandler() {return handler;}public void drawViewfinder() {viewfinderView.drawViewfinder();}@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.capture_flashlight:if (isFlashlightOpen) {cameraManager.setTorch(false); // 关闭闪光灯isFlashlightOpen = false;}else {cameraManager.setTorch(true); // 打开闪光灯isFlashlightOpen = true;}break;default:break;}}private void showErrorDialog() {closeCamera();viewfinderView.setVisibility(View.GONE);AlertDialog.Builder builder = new AlertDialog.Builder(this);builder.setTitle(getString(R.string.app_name));builder.setMessage("扫描确认出错，请重新扫描柜二维码！");builder.setPositiveButton(android.R.string.ok, new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {restartCamera();}});builder.setOnCancelListener(new OnCancelListener() {@Overridepublic void onCancel(DialogInterface dialog) {CaptureCodeActivity.this.finish();}});builder.show();}void restartCamera(){Log.d(TAG, "hasSurface " + hasSurface);viewfinderView.setVisibility(View.VISIBLE);SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);SurfaceHolder surfaceHolder = surfaceView.getHolder();initCamera(surfaceHolder);// 恢复活动监控器inactivityTimer.onResume();}void closeCamera(){if (handler != null) {handler.quitSynchronously();handler = null;}inactivityTimer.onPause();// 关闭摄像头cameraManager.closeDriver();}}在扫描出现问题事弹出dialog，当用户点击确定按钮后重新开始扫描。private void showErrorDialog() {closeCamera();viewfinderView.setVisibility(View.GONE);AlertDialog.Builder builder = new AlertDialog.Builder(this);builder.setTitle(getString(R.string.app_name));builder.setMessage("扫描确认出错，请重新扫描柜子上的二维码！");builder.setPositiveButton(android.R.string.ok, new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {restartCamera();}});builder.setOnCancelListener(new OnCancelListener() {@Overridepublic void onCancel(DialogInterface dialog) {CaptureCodeActivity.this.finish();}});builder.show();}
closeCamera（相当于onPause）和restartCamera（onResume）方法就不贴代码了。
初初尝试着拥抱的人，一派新鲜幸福都来不及沉浸，
