Android条码扫描相机覆盖，按钮切换相机
在我的应用程序中，我有条形码扫描块的视图，它会触发相机通过自定义插件扫描条形码。
我在相机覆盖层上添加了2个按钮。毋庸置疑，我已阅读并尝试了此论坛的各种建议。但无法解决问题。
- 停止：要停止扫描，请关闭相机并返回应用程序的主视图。
- 翻转（相机切换）：单击时，应更改设备的相机。 但是，我的应用程序一直在崩溃。
我做错了什么？
import me.dm7.barcodescanner.zxing.ZXingScannerView;
import android.hardware.Camera;
public class FloatingScannerFragment extends Fragment implements ZXingScannerView.ResultHandler{
private static final String FLASH_STATE = "FLASH_STATE";
private static final String AUTO_FOCUS_STATE = "AUTO_FOCUS_STATE";
private static final String SELECTED_FORMATS = "SELECTED_FORMATS";
private static final String CAMERA_ID = "CAMERA_ID";
private ZXingScannerView mScannerView;
private boolean mFlash=false;
private boolean mAutoFocus=true;
private ArrayList<Integer> mSelectedIndices;
private int mCameraId = -1;
private FloatingScannerFragmentCallbacks mFragmentCallbacks;
private double x, y, w, h;
Button buttonStop, buttonFlipCamera;
private Camera mCamera;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle state) {
if(state == null){
state = this.getArguments();
}
if(state != null) {
x = state.getDouble("x");
y = state.getDouble("y");
w = state.getDouble("w");
h = state.getDouble("h");
}
mScannerView = new ZXingScannerView(getActivity()){
//Adding STOP and CameraFlip buttons on camera Overlay
@Override
public void setupCameraPreview(CameraWrapper cameraWrapper) {
super.setupCameraPreview(cameraWrapper);
buttonStop = new Button(getActivity());
buttonStop.setText("STOP");
buttonFlipCamera = new Button(getActivity());
buttonFlipCamera.setText("FLIP");
//For buttons visibility, set the layout params in order to give some width and height:
ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
buttonStop.setLayoutParams(params);
this.addView(buttonStop);
buttonFlipCamera.setX((float) x + buttonStop.getLayoutParams().height);
buttonFlipCamera.setY((float) y + buttonStop.getLayoutParams().height);
buttonFlipCamera.setLayoutParams(new ViewGroup.LayoutParams((buttonStop.getLayoutParams().width),(buttonStop.getLayoutParams().height)));
this.addView(buttonFlipCamera);
buttonStop.setOnClickListener( new OnClickListener() {
@Override
public void onClick(View v) {
mScannerView.stopCamera();
mScannerView.removeAllViews();
}
});
buttonFlipCamera.setOnClickListener( new OnClickListener() {
@Override
public void onClick(View v) {
switchCamera();
}
});
}
@Override
protected IViewFinder createViewFinderView(Context context) {
return new CustomViewFinderView(context);
}
};
mScannerView.setZ(10);
mScannerView.setAutoFocus(true);
mScannerView.setFlash(false);
mScannerView.setX((float) x);
mScannerView.setY((float) y);
mScannerView.setLayoutParams(new ViewGroup.LayoutParams((int)w, (int)h));
return mScannerView;
}
public void setCallback(FloatingScannerFragmentCallbacks fragmentCallbacks){
mFragmentCallbacks = fragmentCallbacks;
}
@Override
public void onResume() {
super.onResume();
mScannerView.setResultHandler(this);
mScannerView.startCamera(mCameraId);
mScannerView.setFlash(mFlash);
mScannerView.setAutoFocus(mAutoFocus);
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putBoolean(FLASH_STATE, mFlash);
outState.putBoolean(AUTO_FOCUS_STATE,mAutoFocus);
}
@Override
public void onHiddenChanged(boolean hidden) {
super.onHiddenChanged(hidden);
if(!hidden) mScannerView.resumeCameraPreview(this);
}
@Override
public void onPause() {
super.onPause();
mScannerView.stopCamera();
}
/**
* switches between main and front camera
*/
private void switchCamera() {
// TODO: check the number of available cameras
mScannerView.stopCamera();
if (mCameraId == -1) {
mCameraId = 0;
} else {
mCameraId = -1;
}
mScannerView.startCamera(mCameraId);
}
//For the custom text
private static class CustomViewFinderView extends ViewFinderView {
public static final String TRADE_MARK_TEXT = "Please place barcode inside box";
public static final int TRADE_MARK_TEXT_SIZE_SP = 12;
public final Paint PAINT = new Paint();
public CustomViewFinderView(Context context) {
super(context);
init();
}
public CustomViewFinderView(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
private void init() {
PAINT.setColor(Color.WHITE);
PAINT.setAntiAlias(true);
float textPixelSize = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP,
TRADE_MARK_TEXT_SIZE_SP, getResources().getDisplayMetrics());
PAINT.setTextSize(textPixelSize);
setSquareViewFinder(true);
}
@Override
public void onDraw(Canvas canvas) {
super.onDraw(canvas);
drawTradeMark(canvas);
}
private void drawTradeMark(Canvas canvas) {
Rect framingRect = getFramingRect();
float tradeMarkTop;
float tradeMarkLeft;
if (framingRect != null) {
tradeMarkTop = framingRect.bottom + PAINT.getTextSize() + 10;
tradeMarkLeft = framingRect.left;
} else {
tradeMarkTop = 10;
tradeMarkLeft = canvas.getHeight() - PAINT.getTextSize() - 10;
}
canvas.drawText(TRADE_MARK_TEXT, tradeMarkLeft, tradeMarkTop, PAINT);
}
}
}
我的Handleresult（）：理想情况下，在第一次扫描没有恢复后也应恢复相机。
@Override
public void handleResult(Result rawResult) {
try {
Uri notification = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
Ringtone r = RingtoneManager.getRingtone(getActivity().getApplicationContext(), notification);
r.play();
} catch (Exception e) {}
mFragmentCallbacks.onBarcodeScanned(rawResult.getText());
//Resume scanning
mScannerView.resumeCameraPreview(this);
}
感谢您的所有帮助。
编辑： Logcat信息：
04-06 10:16:56.642 2130-3378/com.google.android.googlequicksearchbox:search
I/MicroRecognitionRunner: Starting detection.
04-06 10:16:56.644 2130-2237/com.google.android.googlequicksearchbox:search I/MicrophoneInputStream: mic_starting com.google.android.apps.gsa.staticplugins.z.c@e64e47b
04-06 10:16:56.648 1307-1643/? W/APM_AudioPolicyManager: getInputForAttr() failed opening input: samplingRate 16000, format 1, channelMask 10
04-06 10:16:56.648 2130-2237/com.google.android.googlequicksearchbox:search E/AudioRecord: Could not get audio input for session 393, record source 1999, sample rate 16000, format 0x1, channel mask 0x10, flags 0
04-06 10:16:56.653 2130-2237/com.google.android.googlequicksearchbox:search E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -22.
04-06 10:16:56.654 2130-2237/com.google.android.googlequicksearchbox:search E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object.
04-06 10:16:56.654 2130-2237/com.google.android.googlequicksearchbox:search I/MicrophoneInputStream: mic_started com.google.android.apps.gsa.staticplugins.z.c@e64e47b
04-06 10:16:56.655 2559-3373/com.google.android.gms W/PlatformStatsUtil: Could not retrieve Usage & Diagnostics setting. Giving up.
04-06 10:16:56.657 2130-2237/com.google.android.googlequicksearchbox:search E/ActivityThread: Failed to find provider info for com.google.android.apps.gsa.testing.ui.audio.recorded
04-06 10:16:56.658 2130-2130/com.google.android.googlequicksearchbox:search I/MicroDetectionWorker: onReady
04-06 10:16:56.723 2130-2237/com.google.android.googlequicksearchbox:search I/MicrophoneInputStream: mic_close com.google.android.apps.gsa.staticplugins.z.c@e64e47b
04-06 10:16:56.735 2130-3378/com.google.android.googlequicksearchbox:search I/MicroRecognitionRunner: Detection finished
04-06 10:16:56.735 2130-3378/com.google.android.googlequicksearchbox:search W/ErrorReporter: reportError [type: 211, code: 524300]: Error reading from input stream
04-06 10:16:56.739 2130-2308/com.google.android.googlequicksearchbox:search I/MicroRecognitionRunner: Stopping hotword detection.
04-06 10:16:56.740 2130-3378/com.google.android.googlequicksearchbox:search W/ErrorProcessor: onFatalError, processing error from engine(4)
com.google.android.apps.gsa.shared.speech.a.g: Error reading from input stream
at
com.google.android.apps.gsa.staticplugins.recognizer.i.a.a(SourceFile:342)
at com.google.android.apps.gsa.staticplugins.recognizer.i.a$1.run(SourceFile:1367)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:428)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at com.google.android.apps.gsa.shared.util.concurrent.a.ak.run(SourceFile:66)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
at java.lang.Thread.run(Thread.java:761)
at com.google.android.apps.gsa.shared.util.concurrent.a.ad$1.run(SourceFile:85)
Caused by: com.google.android.apps.gsa.shared.exception.GsaIOException: Error code: 393238 | Buffer overflow, no available space.
at com.google.android.apps.gsa.speech.audio.Tee.g(SourceFile:2531)
at com.google.android.apps.gsa.speech.audio.ap.read(SourceFile:555)
at java.io.InputStream.read(InputStream.java:101)
at com.google.android.apps.gsa.speech.audio.al.run(SourceFile:362)
at com.google.android.apps.gsa.speech.audio.ak$1.run(SourceFile:471)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:428)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at com.google.android.apps.gsa.shared.util.concurrent.a.ak.run(SourceFile:66)
at com.google.android.apps.gsa.shared.util.concurrent.a.ax.run(SourceFile:139)
at com.google.android.apps.gsa.shared.util.concurrent.a.ax.run(SourceFile:139)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
at java.lang.Thread.run(Thread.java:761)
at com.google.android.apps.gsa.shared.util.concurrent.a.ad$1.run(SourceFile:85)
04-06 10:16:56.740 2130-3378/com.google.android.googlequicksearchbox:search I/AudioController: internalShutdown
04-06 10:16:56.745 2130-3377/com.google.android.googlequicksearchbox:search I/DeviceStateChecker: DeviceStateChecker cancelled
04-06 10:16:56.748 2130-2130/com.google.android.googlequicksearchbox:search I/MicroDetector: Keeping mic open: false
04-06 10:16:56.748 2130-2130/com.google.android.googlequicksearchbox:search I/MicroDetectionWorker: #onError(false)
04-06 10:16:56.778 1309-3367/? V/EmulatedCamera_CallbackNotifier: enableMessage: msg_type = 0x10
04-06 10:16:56.780 1309-3367/? V/EmulatedCamera_CallbackNotifier: CAMERA_MSG_PREVIEW_FRAME
04-06 10:16:56.781 1309-3367/? V/EmulatedCamera_CallbackNotifier: **** Currently enabled messages:
04-06 10:16:56.781 1309-3367/? V/EmulatedCamera_CallbackNotifier: CAMERA_MSG_ERROR
04-06 10:16:56.781 1309-3367/? V/EmulatedCamera_CallbackNotifier: CAMERA_MSG_FOCUS
04-06 10:16:56.781 1309-3367/? V/EmulatedCamera_CallbackNotifier: CAMERA_MSG_ZOOM
04-06 10:16:56.781 1309-3367/? V/EmulatedCamera_CallbackNotifier: CAMERA_MSG_PREVIEW_FRAME
04-06 10:16:56.781 1309-3367/? V/EmulatedCamera_CallbackNotifier: CAMERA_MSG_PREVIEW_METADATA
04-06 10:16:56.828 1309-3370/? V/EmulatedCamera_CallbackNotifier: disableMessage: msg_type = 0x10
04-06 10:16:56.828 1309-3370/? V/EmulatedCamera_CallbackNotifier: CAMERA_MSG_PREVIEW_FRAME
04-06 10:16:56.828 1309-3370/? V/EmulatedCamera_CallbackNotifier: **** Currently enabled messages:
04-06 10:16:56.828 1309-3370/? V/EmulatedCamera_CallbackNotifier: CAMERA_MSG_ERROR
04-06 10:16:56.828 1309-3370/? V/EmulatedCamera_CallbackNotifier: CAMERA_MSG_FOCUS
04-06 10:16:56.828 1309-3370/? V/EmulatedCamera_CallbackNotifier: CAMERA_MSG_ZOOM
04-06 10:16:56.828 1309-3370/? V/EmulatedCamera_CallbackNotifier: CAMERA_MSG_PREVIEW_METADATA
应用程序布局：
注意：对于那些为了提供反对票而在这里的成员，请求您停止这样做。如果你不能提出你的建议，至少给别人花一些时间，帮助像我这样的人。 作为一个新鲜的开发人员，任何语言都已经充满了压力，但让代码工作的乐趣是神圣的。这是一个过程，需要时间。谢谢!!
编辑2：更改了按钮开关相机的代码。这是翻转相机的正确方法吗？ 另外，如果我在扫描后正确使用简历，请提供任何建议吗？
0 个答案:
没有答案
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