这是我的代码并且完美地运作
public class MainActivity extends AppCompatActivity {
private CameraSource cameraSource;
private SurfaceView cameraView;
private final int MY_PERMISSIONS_REQUEST_CAMERA = 1;
private String token = "";
private String tokenanterior = "";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
cameraView = (SurfaceView) findViewById(R.id.camera_view);
initQR();
}
public void initQR() {
// creo el detector qr
BarcodeDetector barcodeDetector =
new BarcodeDetector.Builder(this)
.setBarcodeFormats(Barcode.ALL_FORMATS)
.build();
cameraSource = new CameraSource
.Builder(this, barcodeDetector)
.setRequestedPreviewSize(1600, 1024)
.setAutoFocusEnabled(true) //you should add this feature
.build();
cameraView.getHolder().addCallback(new SurfaceHolder.Callback() {
@Override
public void surfaceCreated(SurfaceHolder holder) {
if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CAMERA)
!= PackageManager.PERMISSION_GRANTED) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (shouldShowRequestPermissionRationale(
Manifest.permission.CAMERA)) ;
requestPermissions(new String[]{Manifest.permission.CAMERA},
MY_PERMISSIONS_REQUEST_CAMERA);
}
return;
} else {
try {
cameraSource.start(cameraView.getHolder());
} catch (IOException ie) {
Log.e("CAMERA SOURCE", ie.getMessage());
}
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
cameraSource.stop();
}
});
// preparo el detector de QR
barcodeDetector.setProcessor(new Detector.Processor<Barcode>() {
@Override
public void release() {
}
@Override
public void receiveDetections(Detector.Detections<Barcode> detections) {
final SparseArray<Barcode> barcodes = detections.getDetectedItems();
if (barcodes.size() > 0) {
// get token
token = barcodes.valueAt(0).displayValue.toString();
if (!token.equals(tokenanterior)) {
//save last token procesed
tokenanterior = token;
Log.i("token", token);
if (URLUtil.isValidUrl(token)) {
// if is a URL open browser
Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(token));
startActivity(browserIntent);
} else {
// share with other apps
Intent shareIntent = new Intent();
shareIntent.setAction(Intent.ACTION_SEND);
shareIntent.putExtra(Intent.EXTRA_TEXT, token);
shareIntent.setType("text/plain");
startActivity(shareIntent);
}
new Thread(new Runnable() {
public void run() {
try {
synchronized (this) {
wait(5000);
// clear token
tokenanterior = "";
}
} catch (InterruptedException e) {
// TODO Auto-generated catch block
Log.e("Error", "Waiting didnt work!!");
e.printStackTrace();
}
}
}).start();
}
}
}
});
}
}
但我在代码中不能做任何其他事情，例如我在这里添加了一个吐司：
if (URLUtil.isValidUrl(token)) {
// si es una URL valida abre el navegador
Intent browserIntent = new
Intent(Intent.ACTION_VIEW, Uri.parse(token));
startActivity(browserIntent);
} else {
// comparte en otras apps
//EnviarCodigo(token);
Toast.makeText(getApplicationContext(),"Se registró correctamente",Toast.LENGTH_SHORT).show();
Intent shareIntent = new Intent();
shareIntent.setAction(Intent.ACTION_SEND);
shareIntent.putExtra(Intent.EXTRA_TEXT, token);
shareIntent.setType("text/plain");
startActivity(shareIntent);
}
toast不显示，app不与其他应用共享QR码，或者例如我在这里添加了祝酒词：
@Override
public void receiveDetections(Detector.Detections<Barcode> detections) {
final SparseArray<Barcode> barcodes = detections.getDetectedItems();
if (barcodes.size() > 0) {
// get token
token = barcodes.valueAt(0).displayValue.toString();
Toast.makeText(getApplicationContext(),"Se registró correctamente",Toast.LENGTH_SHORT).show();
，该应用程序也无法正常工作。我究竟做错了什么？请帮帮我。