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Request the camera preview on the main ui thread #324

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merged 1 commit into from
Mar 4, 2018
Merged

Request the camera preview on the main ui thread #324

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4 changes: 1 addition & 3 deletions zxing-android-embedded/src/com/journeyapps/barcodescanner/DecoderThread.java
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Original file line number Diff line number Diff line change
Expand Up @@ -125,9 +125,7 @@ public void onPreviewError(Exception e) {
};

private void requestNextPreview() {
if (cameraInstance.isOpen()) {
cameraInstance.requestPreview(previewCallback);
}
cameraInstance.requestPreview(previewCallback);
}

protected LuminanceSource createSource(SourceData sourceData) {
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18 changes: 14 additions & 4 deletions zxing-android-embedded/src/com/journeyapps/barcodescanner/camera/CameraInstance.java
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,7 @@ public class CameraInstance {
private DisplayConfiguration displayConfiguration;
private boolean open = false;
private boolean cameraClosed = true;
private Handler mainHandler;

private CameraSettings cameraSettings = new CameraSettings();

Expand All @@ -41,6 +42,7 @@ public CameraInstance(Context context) {
this.cameraThread = CameraThread.getInstance();
this.cameraManager = new CameraManager(context);
this.cameraManager.setCameraSettings(cameraSettings);
this.mainHandler = new Handler();
}

/**
Expand Down Expand Up @@ -166,12 +168,20 @@ public boolean isCameraClosed() {
}

public void requestPreview(final PreviewCallback callback) {
validateOpen();

cameraThread.enqueue(new Runnable() {
mainHandler.post(new Runnable() {
@Override
public void run() {
cameraManager.requestPreviewFrame(callback);
if(!open) {
Log.d(TAG, "Camera is closed, not requesting preview");
return;
}

cameraThread.enqueue(new Runnable() {
@Override
public void run() {
cameraManager.requestPreviewFrame(callback);
}
});
}
});
}
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