package com.zbar.lib.decode; import android.os.Handler; import android.os.Message; import com.zbar.lib.CaptureView; import com.zbar.lib.R; import com.zbar.lib.camera.CameraManager; /** * 作者: 陈涛(1076559197@qq.com) * * 时间: 2014年5月9日 下午12:23:32 * * 版本: V_1.0.0 * * 描述: 扫描消息转发 */ public final class CaptureHandler extends Handler { DecodeThread decodeThread; CaptureView captureView; private State state; private enum State { PREVIEW, SUCCESS, DONE } public CaptureHandler(CaptureView captureView) { this.captureView = captureView; decodeThread = new DecodeThread(captureView); decodeThread.start(); state = State.SUCCESS; CameraManager.get().startPreview(); restartPreviewAndDecode(); } @Override public void handleMessage(Message message) { final int id = message.what; if (id == R.id.auto_focus){ if (state == State.PREVIEW) { CameraManager.get().requestAutoFocus(this, R.id.auto_focus); } } else if (id==R.id.restart_preview){ restartPreviewAndDecode(); } else if (id == R.id.decode_succeeded){ state = State.SUCCESS; captureView.handleDecode((String) message.obj);// 解析成功,回调 } else if (id == R.id.decode_failed){ state = State.PREVIEW; CameraManager.get().requestPreviewFrame(decodeThread.getHandler(), R.id.decode); } } public void quitSynchronously() { state = State.DONE; CameraManager.get().stopPreview(); removeMessages(R.id.decode_succeeded); removeMessages(R.id.decode_failed); removeMessages(R.id.decode); removeMessages(R.id.auto_focus); } private void restartPreviewAndDecode() { if (state == State.SUCCESS) { state = State.PREVIEW; CameraManager.get().requestPreviewFrame(decodeThread.getHandler(), R.id.decode); CameraManager.get().requestAutoFocus(this, R.id.auto_focus); } } }