Zxing最新demo【精简支持横竖屏】

/* * Copyright (C) 2008 ZXing authors * * 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 com.google.zxing.BarcodeFormat; import com.google.zxing.DecodeHintType; import com.google.zxing.Result; import com.google.zxing.ResultMetadataType; import com.google.zxing.ResultPoint; import com.google.zxing.client.android.camera.CameraManager; import com.google.zxing.client.android.common.CaptureActivityHandler; import com.google.zxing.client.android.common.FinishListener; import com.google.zxing.client.android.common.ViewfinderView; import com.google.zxing.client.android.common.InactivityTimer; import com.google.zxing.client.android.common.AmbientLightManager; import android.app.Activity; import android.app.AlertDialog; import android.content.pm.ActivityInfo; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Paint; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.util.Log; import android.util.TypedValue; import android.view.KeyEvent; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.View; import android.view.Window; import android.view.WindowManager; import android.widget.ImageView; import android.widget.TextView; import java.io.IOException; import java.text.DateFormat; import java.util.Collection; import java.util.Date; import java.util.EnumSet; 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 final class CaptureActivity extends Activity implements SurfaceHolder.Callback { private static final String TAG = CaptureActivity.class.getSimpleName(); public static final boolean IS_PORTRAIT = true;//是否为竖屏 private static final Collection<ResultMetadataType> DISPLAYABLE_METADATA_TYPES = EnumSet.of(ResultMetadataType.ISSUE_NUMBER, ResultMetadataType.SUGGESTED_PRICE, ResultMetadataType.ERROR_CORRECTION_LEVEL, ResultMetadataType.POSSIBLE_COUNTRY); private CameraManager cameraManager; private CaptureActivityHandler handler; private Result savedResultToShow; private ViewfinderView viewfinderView; private TextView statusView; private View resultView; private Result lastResult; private boolean hasSurface; private Collection<BarcodeFormat> decodeFormats; private Map<DecodeHintType,?> decodeHints; private String characterSet; private InactivityTimer inactivityTimer; private AmbientLightManager ambientLightManager; public ViewfinderView getViewfinderView() { return viewfinderView; } public Handler getHandler() { return handler; } public CameraManager getCameraManager() { return cameraManager; } @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); Window window = getWindow(); window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); setContentView(R.layout.capture); hasSurface = false; inactivityTimer = new InactivityTimer(this); ambientLightManager = new AmbientLightManager(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()); viewfinderView = (ViewfinderView) findViewById(R.id.viewfinder_view); viewfinderView.setCameraManager(cameraManager); resultView = findViewById(R.id.result_view); statusView = (TextView) findViewById(R.id.status_view); handler = null; lastResult = null; if(IS_PORTRAIT){ setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); }else { setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE); } resetStatusView(); ambientLightManager.start(cameraManager); inactivityTimer.onResume(); decodeFormats = null; characterSet = null; 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); } } @Override protected void onPause() { if (handler != null) { handler.quitSynchronously(); handler = null; } inactivityTimer.onPause(); ambientLightManager.stop(); cameraManager.closeDriver(); //historyManager = null; // Keep for onActivityResult 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(); super.onDestroy(); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { switch (keyCode) { case KeyEvent.KEYCODE_BACK: if (lastResult != null) { restartPreviewAfterDelay(0L); return true; } break; case KeyEvent.KEYCODE_FOCUS: case KeyEvent.KEYCODE_CAMERA: // Handle these events so they don't launch the Camera app return true; // Use volume up/down to turn on light 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); } 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.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 scaleFactor amount by