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/* * Copyright (C) 2008 ZXing authors//from w w w.j a v a2s . c om * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.google.zxing.client.android; import android.app.Activity; import android.app.AlertDialog; import android.content.Intent; import android.content.pm.ActivityInfo; import android.content.res.Configuration; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.Rect; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.util.Log; import android.view.*; import android.widget.Toast; import com.google.zxing.BarcodeFormat; import com.google.zxing.Result; import com.google.zxing.ResultMetadataType; import com.google.zxing.ResultPoint; import com.google.zxing.client.android.camera.CameraManager; import eu.livotov.zxscan.R; import eu.livotov.zxscan.ZXScanHelper; import java.io.IOException; import java.util.Collection; import java.util.Map; /** * This activity opens the camera and does the actual scanning on a background thread. It draws a * viewfinder to help the user place the barcode correctly, shows feedback as the image processing * is happening, and then overlays the results when a scan is successful. * * @author dswitkin@google.com (Daniel Switkin) * @author Sean Owen */ public class CaptureActivity extends Activity implements SurfaceHolder.Callback { private static final String TAG = CaptureActivity.class.getSimpleName(); private static final long DEFAULT_INTENT_RESULT_DURATION_MS = 1L; private CameraManager cameraManager; private CaptureActivityHandler handler; private Result savedResultToShow; private boolean hasSurface; private Collection<BarcodeFormat> decodeFormats; private String characterSet; private InactivityTimer inactivityTimer; private BeepManager beepManager; public Handler getHandler() { return handler; } protected CameraManager getCameraManager() { return cameraManager; } @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); // PR:LivotovLabs/zxscanlib ?????????????QR code??landscape?(??????????camera?orientation?????CaptureActivity?portrait?????camera??landscape) // if (android.os.Build.VERSION.SDK_INT < 8 || ZXScanHelper.isBlockCameraRotation()) // { // setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); // } Window window = getWindow(); window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); setContentView(ZXScanHelper.getCustomScanLayout() > 0 ? ZXScanHelper.getCustomScanLayout() : R.layout.capture); hasSurface = false; inactivityTimer = new InactivityTimer(this); beepManager = new BeepManager(this); if (ZXScanHelper.getUserCallback() != null) { ZXScanHelper.getUserCallback().onScannerActivityCreated(this); } } @Override protected void onResume() { super.onResume(); // CameraManager must be initialized here, not in onCreate(). This is necessary because we don't // want to open the camera driver and measure the screen size if we're going to show the help on // first launch. That led to bugs where the scanning rectangle was the wrong size and partially // off screen. cameraManager = new CameraManager(getApplication()); handler = null; resetStatusView(); SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view); SurfaceHolder surfaceHolder = surfaceView.getHolder(); if (hasSurface) { // The activity was paused but not stopped, so the surface still exists. Therefore // surfaceCreated() won't be called, so init the camera here. initCamera(surfaceHolder); } else { // Install the callback and wait for surfaceCreated() to init the camera. surfaceHolder.addCallback(this); surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); } inactivityTimer.onResume(); decodeFormats = DecodeFormatManager.QR_CODE_FORMATS; //todo: read from helper characterSet = "utf-8"; if (ZXScanHelper.getUserCallback() != null) { ZXScanHelper.getUserCallback().onScannerActivityResumed(this); } } @Override protected void onPause() { if (handler != null) { handler.quitSynchronously(); handler = null; } inactivityTimer.onPause(); cameraManager.closeDriver(); if (!hasSurface) { SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view); SurfaceHolder surfaceHolder = surfaceView.getHolder(); surfaceHolder.removeCallback(this); } super.onPause(); } @Override protected void onDestroy() { inactivityTimer.shutdown(); if (ZXScanHelper.getUserCallback() != null) { ZXScanHelper.getUserCallback().onScannerActivityDestroyed(this); } super.onDestroy(); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { switch (keyCode) { case KeyEvent.KEYCODE_BACK: setResult(RESULT_CANCELED); finish(); return true; case KeyEvent.KEYCODE_FOCUS: case KeyEvent.KEYCODE_CAMERA: return true; case KeyEvent.KEYCODE_VOLUME_DOWN: cameraManager.setTorch(false); return true; case KeyEvent.KEYCODE_VOLUME_UP: cameraManager.setTorch(true); return true; } return super.onKeyDown(keyCode, event); } @Override public boolean onOptionsItemSelected(MenuItem item) { return super.onOptionsItemSelected(item); } private void decodeOrStoreSavedBitmap(Bitmap bitmap, Result result) { // Bitmap isn't used yet -- will be used soon if (handler == null) { savedResultToShow = result; } else { if (result != null) { savedResultToShow = result; } if (savedResultToShow != null) { Message message = Message.obtain(handler, R.id.zx_decode_succeeded, savedResultToShow); handler.sendMessage(message); } savedResultToShow = null; } } @Override public void surfaceCreated(SurfaceHolder holder) { if (holder == null) { Log.e(TAG, "*** WARNING *** surfaceCreated() gave us a null surface!"); } if (!hasSurface) { hasSurface = true; initCamera(holder); } } @Override public void surfaceDestroyed(SurfaceHolder holder) { hasSurface = false; } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } /** * A valid barcode has been found, so give an indication of success and show the results. * * @param rawResult The contents of the barcode. * @param barcode A greyscale bitmap of the camera data which was decoded. */ public void handleDecode(Result rawResult, Bitmap barcode) { inactivityTimer.onActivity(); if (ZXScanHelper.isPlaySoundOnRead()) { beepManager.playBeep(); } if (ZXScanHelper.isVibrateOnRead()) { beepManager.vibrate(); } if (barcode != null) { drawResultPoints(barcode, rawResult); } boolean accept = rawResult != null; if (accept && ZXScanHelper.getUserCallback() != null) { accept = ZXScanHelper.getUserCallback().onCodeRead(rawResult.getText()); } if (accept) { handleDecodeExternally(rawResult, barcode); // PROC 1 } else { Toast.makeText(this, "please scan another QR code", Toast.LENGTH_SHORT).show(); // JTODO string xml restartPreviewAfterDelay(300L); } } /** * Superimpose a line for 1D or dots for 2D to highlight the key features of the barcode. * * @param barcode A bitmap of the captured image. * @param rawResult The decoded results which contains the points to draw. */ private void drawResultPoints(Bitmap barcode, Result rawResult) { ResultPoint[] points = rawResult.getResultPoints(); if (points != null && points.length > 0) { Canvas canvas = new Canvas(barcode); Paint paint = new Paint(); paint.setColor(getResources().getColor(R.color.zx_result_image_border)); paint.setStrokeWidth(3.0f); paint.setStyle(Paint.Style.STROKE); Rect border = new Rect(2, 2, barcode.getWidth() - 2, barcode.getHeight() - 2); canvas.drawRect(border, paint); paint.setColor(getResources().getColor(R.color.zx_result_points)); if (points.length == 2) { paint.setStrokeWidth(4.0f); drawLine(canvas, paint, points[0], points[1]); } else if (points.length == 4 && (rawResult.getBarcodeFormat() == BarcodeFormat.UPC_A || rawResult.getBarcodeFormat() == BarcodeFormat.EAN_13)) { // Hacky special case -- draw two lines, for the barcode and metadata drawLine(canvas, paint, points[0], points[1]); drawLine(canvas, paint, points[2], points[3]); } else { paint.setStrokeWidth(10.0f); for (ResultPoint point : points) { canvas.drawPoint(point.getX(), point.getY(), paint); } } } } private static void drawLine(Canvas canvas, Paint paint, ResultPoint a, ResultPoint b) { canvas.drawLine(a.getX(), a.getY(), b.getX(), b.getY(), paint); } // Briefly show the contents of the barcode, then handle the result outside Barcode Scanner. private void handleDecodeExternally(Result rawResult, Bitmap barcode) { Intent intent = new Intent(getIntent().getAction()); intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET); intent.putExtra(Intents.Scan.RESULT, rawResult.toString()); intent.putExtra(Intents.Scan.RESULT_FORMAT, rawResult.getBarcodeFormat().toString()); byte[] rawBytes = rawResult.getRawBytes(); if (rawBytes != null && rawBytes.length > 0) { intent.putExtra(Intents.Scan.RESULT_BYTES, rawBytes); } Map<ResultMetadataType, ?> metadata = rawResult.getResultMetadata(); if (metadata != null) { if (metadata.containsKey(ResultMetadataType.UPC_EAN_EXTENSION)) { intent.putExtra(Intents.Scan.RESULT_UPC_EAN_EXTENSION, metadata.get(ResultMetadataType.UPC_EAN_EXTENSION).toString()); } Integer orientation = (Integer) metadata.get(ResultMetadataType.ORIENTATION); if (orientation != null) { intent.putExtra(Intents.Scan.RESULT_ORIENTATION, orientation.intValue()); } String ecLevel = (String) metadata.get(ResultMetadataType.ERROR_CORRECTION_LEVEL); if (ecLevel != null) { intent.putExtra(Intents.Scan.RESULT_ERROR_CORRECTION_LEVEL, ecLevel); } Iterable<byte[]> byteSegments = (Iterable<byte[]>) metadata.get(ResultMetadataType.BYTE_SEGMENTS); if (byteSegments != null) { int i = 0; for (byte[] byteSegment : byteSegments) { intent.putExtra(Intents.Scan.RESULT_BYTE_SEGMENTS_PREFIX + i, byteSegment); i++; } } } sendReplyMessage(R.id.zx_return_scan_result, intent); } private void sendReplyMessage(int id, Object arg) { Message message = Message.obtain(handler, id, arg); long resultDurationMS = getIntent().getLongExtra(Intents.Scan.RESULT_DISPLAY_DURATION_MS, DEFAULT_INTENT_RESULT_DURATION_MS); if (resultDurationMS > 0L) { handler.sendMessageDelayed(message, resultDurationMS); } else { handler.sendMessage(message); } } private void initCamera(SurfaceHolder surfaceHolder) { if (surfaceHolder == null) { throw new IllegalStateException("No SurfaceHolder provided"); } if (cameraManager.isOpen()) { Log.w(TAG, "initCamera() while already open -- late SurfaceView callback?"); return; } try { cameraManager.openDriver(surfaceHolder); // Creating the handler starts the preview, which can also throw a RuntimeException. if (handler == null) { handler = new CaptureActivityHandler(this, decodeFormats, characterSet, cameraManager); } decodeOrStoreSavedBitmap(null, null); } catch (IOException ioe) { Log.w(TAG, ioe); displayFrameworkBugMessageAndExit(ioe); } catch (RuntimeException e) { // Barcode Scanner has seen crashes in the wild of this variety: // java.?lang.?RuntimeException: Fail to connect to camera service Log.w(TAG, "Unexpected error initializing camera", e); displayFrameworkBugMessageAndExit(e); } } private void displayFrameworkBugMessageAndExit(Throwable err) { AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle(getString(R.string.zx_error)); builder.setMessage(getString(R.string.zx_unexpected_camera_error, err.getClass().getName() + ": " + err.getMessage())); builder.setPositiveButton(R.string.zx_close, new FinishListener(this)); builder.setOnCancelListener(new FinishListener(this)); builder.show(); } public void restartPreviewAfterDelay(long delayMS) { if (handler != null) { handler.sendEmptyMessageDelayed(R.id.zx_restart_preview, delayMS); } resetStatusView(); } private void resetStatusView() { } public void drawViewfinder() { } public void onConfigurationChanged(final Configuration newConfig) { super.onConfigurationChanged(newConfig); try { if (cameraManager.isOpen()) { cameraManager.forceSetCameraOrientation(); } } catch (Throwable err) { err.printStackTrace(); } } }