package com.google.zxing.client.android;
import com.google.zxing.BarcodeFormat;
-import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
-import com.google.zxing.MultiFormatReader;
-import com.google.zxing.ReaderException;
-import com.google.zxing.Result;
import com.google.zxing.ResultPointCallback;
-import com.google.zxing.client.android.camera.CameraManager;
-import com.google.zxing.common.HybridBinarizer;
import android.content.SharedPreferences;
-import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
-import android.os.Message;
import android.preference.PreferenceManager;
-import android.util.Log;
import java.util.Hashtable;
import java.util.Vector;
*/
final class DecodeThread extends Thread {
- private static final String TAG = DecodeThread.class.getSimpleName();
-
public static final String BARCODE_BITMAP = "barcode_bitmap";
- private Handler handler;
- private final CaptureActivity activity;
- private final MultiFormatReader multiFormatReader;
+ private final Handler handler;
DecodeThread(CaptureActivity activity,
Vector<BarcodeFormat> decodeFormats,
String characterSet,
ResultPointCallback resultPointCallback) {
- this.activity = activity;
- multiFormatReader = new MultiFormatReader();
Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>(3);
// The prefs can't change while the thread is running, so pick them up once here.
hints.put(DecodeHintType.NEED_RESULT_POINT_CALLBACK, resultPointCallback);
- multiFormatReader.setHints(hints);
+ this.handler = new DecodeHandler(activity, hints);
}
Handler getHandler() {
@Override
public void run() {
Looper.prepare();
- handler = new Handler() {
- @Override
- public void handleMessage(Message message) {
- switch (message.what) {
- case R.id.decode:
- decode((byte[]) message.obj, message.arg1, message.arg2);
- break;
- case R.id.quit:
- Looper.myLooper().quit();
- break;
- }
- }
- };
Looper.loop();
}
- /**
- * Decode the data within the viewfinder rectangle, and time how long it took. For efficiency,
- * reuse the same reader objects from one decode to the next.
- *
- * @param data The YUV preview frame.
- * @param width The width of the preview frame.
- * @param height The height of the preview frame.
- */
- private void decode(byte[] data, int width, int height) {
- long start = System.currentTimeMillis();
- Result rawResult = null;
- PlanarYUVLuminanceSource source = CameraManager.get().buildLuminanceSource(data, width, height);
- BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
- try {
- rawResult = multiFormatReader.decodeWithState(bitmap);
- } catch (ReaderException re) {
- // continue
- } finally {
- multiFormatReader.reset();
- }
-
- if (rawResult != null) {
- long end = System.currentTimeMillis();
- Log.v(TAG, "Found barcode (" + (end - start) + " ms):\n" + rawResult.toString());
- Message message = Message.obtain(activity.getHandler(), R.id.decode_succeeded, rawResult);
- Bundle bundle = new Bundle();
- bundle.putParcelable(BARCODE_BITMAP, source.renderCroppedGreyscaleBitmap());
- message.setData(bundle);
- message.sendToTarget();
- } else {
- Message message = Message.obtain(activity.getHandler(), R.id.decode_failed);
- message.sendToTarget();
- }
- }
-
}