Android 我想在用zxing库扫描qrcode时打开手电筒
仅打开手电筒而不打开ScannerView如何修复它,我需要ScannerView中的手电筒图标&如果需要,手电筒是打开的。Android 我想在用zxing库扫描qrcode时打开手电筒,android,Android,仅打开手电筒而不打开ScannerView如何修复它,我需要ScannerView中的手电筒图标&如果需要,手电筒是打开的。 public class MainActivity extends AppCompatActivity implements ZXingScannerView.ResultHandler { private ZXingScannerView mScannerView; Result rawResult; Camera cam; @Overr
public class MainActivity extends AppCompatActivity implements ZXingScannerView.ResultHandler {
private ZXingScannerView mScannerView;
Result rawResult;
Camera cam;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mScannerView = new ZXingScannerView(this); // Programmatically initialize the scanner view
setContentView(mScannerView);
mScannerView.setResultHandler(this); // Register ourselves as a handler for scan results.
mScannerView.startCamera();
cam = Camera.open();
Camera.Parameters p = cam.getParameters();
p.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);
cam.setParameters(p);
cam.startPreview();
if(Build.VERSION.SDK\u INT>=Build.VERSION\u code.M){
CameraManager=(CameraManager)getSystemService(Context.CAMERA_服务);
字符串cameraId=null;//通常后置摄像头位于0位置。
试一试{
cameraId=camManager.getCameraIdList()[0];
camManager.setTorchMode(cameraId,false);
//TODO打开闪光灯
mScannerView.setFlash(真);
}捕获(CameraAccessE异常){
e、 printStackTrace();
}
}
mScannerView.setFlash(真);//打开闪光灯
mScannerView.setFlash(假);//打开闪光灯
您有什么问题吗?请编辑你的帖子并附上解释。你能添加你的XML代码和插件版本名吗?你的答案看起来简单而好
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.FLASHLIGHT"/>
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
CameraManager camManager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
String cameraId = null; // Usually back camera is at 0 position.
try {
cameraId = camManager.getCameraIdList()[0];
camManager.setTorchMode(cameraId, false);
// TODO Turn ON Flash Light On
mScannerView.setFlash(true);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
mScannerView.setFlash(true); // Turn on Flash Light
mScannerView.setFlash(false); // Turn Flash Light