ZBarDemo条形码扫描

/* * Basic no frills app which integrates the ZBar barcode scanner with * the camera. * * Created by lisah0 on 2012-02-24 */ package com.kang.zbar; import java.io.IOException; import net.sourceforge.zbar.Config; import net.sourceforge.zbar.Image; import net.sourceforge.zbar.ImageScanner; import net.sourceforge.zbar.Symbol; import net.sourceforge.zbar.SymbolSet; import android.app.Activity; import android.content.Intent; import android.content.pm.ActivityInfo; import android.content.res.AssetFileDescriptor; import android.hardware.Camera; import android.hardware.Camera.AutoFocusCallback; import android.hardware.Camera.PreviewCallback; import android.hardware.Camera.Size; import android.media.AudioManager; import android.media.MediaPlayer; import android.media.MediaPlayer.OnCompletionListener; import android.os.Bundle; import android.os.Handler; import android.os.Vibrator; import android.widget.FrameLayout; import android.widget.TextView; public class CameraTestActivity extends Activity { private static final float BEEP_VOLUME = 0.10f; private static final long VIBRATE_DURATION = 200L; private Camera mCamera; private CameraPreview mPreview; private Handler autoFocusHandler; private MediaPlayer mediaPlayer; private boolean playBeep = true; ImageScanner scanner; private boolean previewing = true; static { System.loadLibrary("iconv"); } public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.zbar_capture); setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); autoFocusHandler = new Handler(); mCamera = getCameraInstance(); /* Instance barcode scanner */ scanner = new ImageScanner(); scanner.setConfig(0, Config.X_DENSITY, 3); scanner.setConfig(0, Config.Y_DENSITY, 3); mPreview = new CameraPreview(this, mCamera, previewCb, autoFocusCB); FrameLayout preview = (FrameLayout) findViewById(R.id.cameraPreview); preview.addView(mPreview); mCamera.setPreviewCallback(previewCb); mCamera.startPreview(); previewing = true; mCamera.autoFocus(autoFocusCB); // 初始化声音和震动 AudioManager audioService = (AudioManager) getSystemService(AUDIO_SERVICE); // 如果手机是震动模式就震动 if (audioService.getRingerMode() != AudioManager.RINGER_MODE_NORMAL) { playBeep = false; } // 初始化声音 initBeepSound(); } public void onPause() { super.onPause(); releaseCamera(); } /** A safe way to get an instance of the Camera object. */ public static Camera getCameraInstance() { Camera c = null; try { c = Camera.open(); } catch (Exception e) { } return c; } private void releaseCamera() { if (mCamera != null) { previewing = false; mCamera.setPreviewCallback(null); mCamera.release(); mCamera = null; } } private Runnable doAutoFocus = new Runnable() { public void run() { if (previewing) mCamera.autoFocus(autoFocusCB); } }; PreviewCallback previewCb = new PreviewCallback() { public void onPreviewFrame(byte[] data, Camera camera) { Camera.Parameters parameters = camera.getParameters(); Size size = parameters.getPreviewSize(); Image barcode = new Image(size.width, size.height, "Y800"); barcode.setData(data); int result = scanner.scanImage(barcode); if (result != 0) { previewing = false; mCamera.setPreviewCallback(null); mCamera.stopPreview(); SymbolSet syms = scanner.getResults(); playBeepSoundAndVibrate();// 播放声音和振动代表成功获取二维码 for (Symbol sym : syms) { // 将扫描后的信息返回 Intent intent = new Intent(); intent.putExtra("Code", sym.getData()); setResult(RESULT_OK, intent); finish(); } } } }; // Mimic continuous auto-focusing AutoFocusCallback autoFocusCB = new AutoFocusCallback() { public void onAutoFocus(boolean success, Camera camera) { autoFocusHandler.postDelayed(doAutoFocus, 1000); } }; /** * 初始化声音 */ private void initBeepSound() { if (playBeep && mediaPlayer == null) { 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; } } } /** * 播放声音和震动 */ private void playBeepSoundAndVibrate() { if (playBeep && mediaPlayer != null) { mediaPlayer.start(); } // 打开震动 Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE); vibrator.vibrate(VIBRATE_DURATION); } private final OnCompletionListener beepListener = new OnCompletionListener() { public void onCompletion(MediaPlayer mediaPlayer) { mediaPlayer.seekTo(0); } }; }