com.google.zxing.client.android.decode.DecodeThread Maven / Gradle / Ivy

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/*
 * Copyright (c) 2015 [[email protected] | [email protected]]
 *
 * Licensed under the Apache License, Version 2.0 (the "License”);
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.zxing.client.android.decode;

import android.app.Activity;
import android.os.Handler;
import android.os.Looper;
import android.util.Log;

import com.snicesoft.android.scan.IScan;

import java.util.concurrent.CountDownLatch;

/**
 * This thread does all the heavy lifting of decoding the images.
 *
 * @author [email protected] (Daniel Switkin)
 */
public class DecodeThread extends Thread {

    public static final String BARCODE_BITMAP = "BARCODE_BITMAP";
    public static final String DECODE_MODE = "DECODE_MODE";
    public static final String DECODE_TIME = "DECODE_TIME";

    private final Activity activity;
    private Handler handler;
    private final CountDownLatch handlerInitLatch;

    public DecodeThread(Activity activity) {
        this.activity = activity;
        if (!(activity instanceof IScan)) {
            Log.e("DecodeThread", "Activity must implements IScan.");
        }
        handlerInitLatch = new CountDownLatch(1);
    }

    public Handler getHandler() {
        try {
            handlerInitLatch.await();
        } catch (InterruptedException ie) {
            // continue?
        }
        return handler;
    }

    @Override
    public void run() {
        Looper.prepare();
        handler = new DecodeHandler((IScan) activity);
        handlerInitLatch.countDown();
        Looper.loop();
    }

}