package com.qiaozi.activity;
import java.util.Timer;
import java.util.TimerTask;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.Result;
import com.google.zxing.Android.PlanarYUVLuminanceSource;
import com.google.zxing.common.HybridBinarizer;
import android.app.Activity;
import android.graphics.Bitmap;
import android.hardware.Camera;
import android.os.Bundle;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
public class MainActivity extends Activity {
/** Called when the activity is first created. */
private SurfaceView sfvCamera;
private SFHCamera sfhCamera;
private ImageView imgView;
private View centerView;
private TextView txtScanResult;
private Timer mTimer;
private MyTimerTask mTimerTask;
private Button bt;
// 按照标准HVGA
final static int width = 480;
final static int height = 320;
int dstLeft, dstTop, dstWidth, dstHeight;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
this.setTitle("Android条码/二维码识别Demo-----hellogv");
imgView = (ImageView) this.findViewById(R.id.ImageView01);
centerView = (View) this.findViewById(R.id.centerView);
sfvCamera = (SurfaceView) this.findViewById(R.id.sfvCamera);
sfhCamera = new SFHCamera(sfvCamera.getHolder(), width, height,
previewCallback);
txtScanResult=(TextView)this.findViewById(R.id.txtScanResult);
bt=(Button) this.findViewById(R.id.bt);
bt.setOnClickListener(btclick);
// 初始化定时器
//mTimer = new Timer();
//mTimerTask = new MyTimerTask();
//mTimer.schedule(mTimerTask, 0, 80);
}
OnClickListener btclick = new OnClickListener() {
@Override
public void onClick(View arg0) {
if (dstLeft == 0) {//只赋值一次
dstLeft = centerView.getLeft() * width
/ getWindowManager().getDefaultDisplay().getWidth();
dstTop = centerView.getTop() * height
/ getWindowManager().getDefaultDisplay().getHeight();
dstWidth = (centerView.getRight() - centerView.getLeft())* width
/ getWindowManager().getDefaultDisplay().getWidth();
dstHeight = (centerView.getBottom() - centerView.getTop())* height
/ getWindowManager().getDefaultDisplay().getHeight();
}
sfhCamera.AutoFocusAndPreviewCallback();
//**************************
}
};
class MyTimerTask extends TimerTask {
@Override
public void run() {
if (dstLeft == 0) {//只赋值一次
dstLeft = centerView.getLeft() * width
/ getWindowManager().getDefaultDisplay().getWidth();
dstTop = centerView.getTop() * height
/ getWindowManager().getDefaultDisplay().getHeight();
dstWidth = (centerView.getRight() - centerView.getLeft())* width
/ getWindowManager().getDefaultDisplay().getWidth();
dstHeight = (centerView.getBottom() - centerView.getTop())* height
/ getWindowManager().getDefaultDisplay().getHeight();
}
sfhCamera.AutoFocusAndPreviewCallback();
}
}
/**
* 自动对焦后输出图片
*/
private Camera.PreviewCallback previewCallback = new Camera.PreviewCallback() {
@Override
public void onPreviewFrame(byte[] data, Camera arg1) {
//取得指定范围的帧的数据
PlanarYUVLuminanceSource source = new PlanarYUVLuminanceSource(
data, width, height, dstLeft, dstTop, dstWidth, dstHeight);
//取得灰度图
Bitmap mBitmap = source.renderCroppedGreyscaleBitmap();
//显示灰度图
imgView.setImageBitmap(mBitmap);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
MultiFormatReader reader = new MultiFormatReader();
try {
Result result = reader.decode(bitmap);
String strResult = "BarcodeFormat:"
+ result.getBarcodeFormat().toString() + " text:"
+ result.getText();
txtScanResult.setText(strResult);
} catch (Exception e) {
txtScanResult.setText("Scanning");
}
}
};
}