Java tutorial
/* * 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 zxing.util; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.util.Collection; import java.util.Map; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.DefaultHttpClient; import zxing.util.camera.CameraManager; import android.app.Activity; import android.app.AlertDialog; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; 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.Looper; import android.os.Message; import android.preference.PreferenceManager; import android.util.Log; import android.util.TypedValue; import android.view.Gravity; import android.view.KeyEvent; import android.view.Surface; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.View; import android.view.View.OnClickListener; import android.view.Window; import android.view.WindowManager; import android.widget.Button; import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast; import com.google.zxing.BarcodeFormat; import com.google.zxing.DecodeHintType; import com.google.zxing.Result; import com.google.zxing.ResultPoint; import com.google.zxing.client.result.ParsedResult; import com.google.zxing.client.result.ResultParser; import extrace.misc.model.ExpressSheet; import extrace.ui.main.LoginActivity; import extrace.ui.main.R; import extrace.ui.main.MainActivity; import extrace.ui.main.baidumap.BaiduActivity; /** * 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(); // private static final long DEFAULT_INTENT_RESULT_DURATION_MS = 1500L; // private static final long BULK_MODE_SCAN_DELAY_MS = 1000L; private CameraManager cameraManager; private CaptureActivityHandler handler; private ViewfinderView viewfinderView; private TextView statusView; private View resultView; private String lastResult; private boolean hasSurface; private Collection<BarcodeFormat> decodeFormats; private Map<DecodeHintType, ?> decodeHints; private String characterSet; private InactivityTimer inactivityTimer; private BeepManager beepManager; private AmbientLightManager ambientLightManager; private Button backButton; ViewfinderView getViewfinderView() { return viewfinderView; } public Handler getHandler() { return handler; } 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); backButton = (Button) findViewById(R.id.cancel_capture); backButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub CaptureActivity.this.finish(); Intent backIntent = new Intent(CaptureActivity.this, MainActivity.class); startActivity(backIntent); } }); hasSurface = false; // historyManager = new HistoryManager(this); // historyManager.trimHistory(); inactivityTimer = new InactivityTimer(this); beepManager = new BeepManager(this); ambientLightManager = new AmbientLightManager(this); PreferenceManager.setDefaultValues(this, R.xml.preferences, false); } @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; SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); if (prefs.getBoolean(PreferencesActivity.KEY_DISABLE_AUTO_ORIENTATION, true)) { setRequestedOrientation(getCurrentOrientation()); } else { // setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE); setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT); } 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); } beepManager.updatePrefs(); ambientLightManager.start(cameraManager); inactivityTimer.onResume(); Intent intent = getIntent(); decodeFormats = null; characterSet = null; if (intent != null) { //String action = intent.getAction(); //String dataString = intent.getDataString(); //characterSet = intent.getStringExtra(Intents.Scan.CHARACTER_SET); } } private int getCurrentOrientation() { int rotation = getWindowManager().getDefaultDisplay().getRotation(); switch (rotation) { case Surface.ROTATION_0: return ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT; case Surface.ROTATION_90: return ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE; default: return ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE; } } @Override protected void onPause() { if (handler != null) { handler.quitSynchronously(); handler = null; } inactivityTimer.onPause(); ambientLightManager.stop(); 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(); super.onDestroy(); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { switch (keyCode) { case KeyEvent.KEYCODE_BACK: Intent intent = new Intent(); if (lastResult != null) { intent.putExtra("BarCode", lastResult); setResult(RESULT_OK, intent); finish(); return true; } else { restartPreviewAfterDelay(0L); return true; } // if ((source == IntentSource.NONE || source == IntentSource.ZXING_LINK) // && 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); } @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 which thumbnail was scaled * @param barcode * A greyscale bitmap of the camera data which was decoded. */ public void handleDecode(Result rawResult, Bitmap barcode, float scaleFactor) { inactivityTimer.onActivity(); //lastResult = rawResult; String url = "http://192.168.1.105:8080/ExTraceWebService_war/REST/Domain"; beepManager.playBeepSoundAndVibrate(); String resultString = rawResult.getText(); Intent mIntent = getIntent(); if (mIntent.getStringExtra("Action").equals("Pkg")) { switch (Integer.parseInt(mIntent.getStringExtra("role").toString().substring(0, 1))) { //( // case 1: Log.i("teasdfjsadf", mIntent.getStringExtra("role").toString()); if (resultString.startsWith("1")) { url = url + "/receiveExpressSheetId/id/" + resultString + "/uid/" + mIntent.getStringExtra("role").toString(); startOnePkgExp(url);// // Intent intentTest=new Intent(this,BaiduActivity.class); // startActivity(intentTest); break; } else if (resultString.startsWith("8")) { url = url + "/dispatchExpressSheetId/id/" + resultString + "/uid/" + mIntent.getStringExtra("role").toString(); changePkgToStatus4(url);// break; } else { break; } // case 2: if (resultString.startsWith("8")) { url = url + "/receiveExpressSheetId/id/" + resultString + "/uid/" + mIntent.getStringExtra("role").toString(); startOnePkgExp(url);// // Intent intentTest=new Intent(this,BaiduActivity.class); // startActivity(intentTest); break; } break; // case 3: if (resultString.startsWith("1")) { url = url + "/packTransPackage/PackageID/" + "8001" + "/ExpressID/" + resultString; // Intent intentTest=new Intent(this,BaiduActivity.class); // startActivity(intentTest); break; } else if (resultString.startsWith("8")) { url = url + "/unpackTransPackage/" + resultString + "/uid/" + mIntent.getStringExtra("role").toString(); break; } else { break; } } } else if (mIntent.getStringExtra("Action").equals("exp")) { // switch (Integer.parseInt(mIntent.getStringExtra("role"))) { case 1: //finsh(); break; case 2: if (resultString.startsWith("8")) { url = url + "/unpackTransPackage/" + "8001"; // Intent intentTest=new Intent(this,BaiduActivity.class); // startActivity(intentTest); break; } else { } //finsh(); break; // case 3: } } drawResultPoints(barcode, scaleFactor, rawResult); statusView.setVisibility(View.GONE); viewfinderView.setVisibility(View.GONE); resultView.setVisibility(View.VISIBLE); ImageView barcodeImageView = (ImageView) findViewById(R.id.barcode_image_view); if (barcode == null) { barcodeImageView.setImageBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.launcher_icon)); } else { barcodeImageView.setImageBitmap(barcode); } ParsedResult result = ResultParser.parseResult(rawResult); String contents = result.getDisplayResult().replace("\r", ""); CharSequence displayContents = contents; lastResult = contents; TextView contentsTextView = (TextView) findViewById(R.id.contents_text_view); contentsTextView.setText(displayContents); int scaledSize = Math.max(22, 32 - displayContents.length() / 4); contentsTextView.setTextSize(TypedValue.COMPLEX_UNIT_SP, scaledSize); } private void changePkgToStatus4(String url) { Log.i("teasdfjsadf", url); HttpClient httpClient = new DefaultHttpClient(); HttpGet httpGet = new HttpGet(url); try { // HttpResponse response = httpClient.execute(httpGet); // 200 if (response.getStatusLine().getStatusCode() == 200) { // entity HttpEntity entity = response.getEntity(); BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent())); String result = reader.readLine(); if (!(result == null)) { Log.i("startOnepkg", ""); CaptureActivity.this.finish(); showToastByRunnable(CaptureActivity.this, "", 3000); } else { showToastByRunnable(CaptureActivity.this, "", 3000); } Log.d("HTTP", "GET:" + result); } else { showToastByRunnable(CaptureActivity.this, "", 3000); } } catch (Exception e) { e.printStackTrace(); } // TODO Auto-generated method stub // TODO Auto-generated method stub } private void startOnePkgExp(String url) { Log.i("teasdfjsadf", url); HttpClient httpClient = new DefaultHttpClient(); HttpGet httpGet = new HttpGet(url); try { // HttpResponse response = httpClient.execute(httpGet); // 200 if (response.getStatusLine().getStatusCode() == 200) { // entity HttpEntity entity = response.getEntity(); BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent())); String result = reader.readLine(); if (!(result == null)) { Log.i("startOnepkg", ""); CaptureActivity.this.finish(); showToastByRunnable(CaptureActivity.this, "", 3000); } else { showToastByRunnable(CaptureActivity.this, "", 3000); } Log.d("HTTP", "GET:" + result); } else { showToastByRunnable(CaptureActivity.this, "", 3000); } } catch (Exception e) { e.printStackTrace(); } // TODO Auto-generated method stub } // void deletePackage(String resultString) { // TODO Auto-generated method stub // HttpClient // HttpClient HttpClient httpClient = new DefaultHttpClient(); // "test""text"BUG // String url = "http://192.168.1.119:8080/ExTraceWebService_war/REST/Misc/getTransPackage/" + resultString; String url = "http://192.168.1.119:8080/ExTraceWebService_war/REST/Domain/unpackTransPackage/" + resultString; // , HttpGet httpGet = new HttpGet(url); try { // HttpResponse response = httpClient.execute(httpGet); // 200 if (response.getStatusLine().getStatusCode() == 200) { // entity HttpEntity entity = response.getEntity(); BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent())); String result = reader.readLine(); if (result.equals("true")) { // Intent loginIntent = new Intent(CaptureActivity.this, // LoginActivity.class); // startActivity(loginIntent); CaptureActivity.this.finish(); showToastByRunnable(CaptureActivity.this, "", 3000); } else { showToastByRunnable(CaptureActivity.this, "", 3000); } Log.d("HTTP", "GET:" + result); } else { showToastByRunnable(CaptureActivity.this, "", 3000); } } catch (Exception e) { e.printStackTrace(); } } private void showToastByRunnable(final Context context, final CharSequence text, final int duration) { Handler handler = new Handler(Looper.getMainLooper()); handler.post(new Runnable() { @Override public void run() { Toast.makeText(context, text, duration).show(); } }); } /** * 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 scaleFactor * amount by which thumbnail was scaled * @param rawResult * The decoded results which contains the points to draw. */ private void drawResultPoints(Bitmap barcode, float scaleFactor, 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.result_points)); if (points.length == 2) { paint.setStrokeWidth(4.0f); drawLine(canvas, paint, points[0], points[1], scaleFactor); } 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], scaleFactor); drawLine(canvas, paint, points[2], points[3], scaleFactor); } else { paint.setStrokeWidth(10.0f); for (ResultPoint point : points) { if (point != null) { canvas.drawPoint(scaleFactor * point.getX(), scaleFactor * point.getY(), paint); } } } } } private static void drawLine(Canvas canvas, Paint paint, ResultPoint a, ResultPoint b, float scaleFactor) { if (a != null && b != null) { canvas.drawLine(scaleFactor * a.getX(), scaleFactor * a.getY(), scaleFactor * b.getX(), scaleFactor * b.getY(), paint); } } private void sendReplyMessage(int id, Object arg, long delayMS) { if (handler != null) { Message message = Message.obtain(handler, id, arg); if (delayMS > 0L) { handler.sendMessageDelayed(message, delayMS); } 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, decodeHints, characterSet, cameraManager); } // decodeOrStoreSavedBitmap(null, null); } catch (IOException ioe) { Log.w(TAG, ioe); displayFrameworkBugMessageAndExit(); } 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(); } } private void displayFrameworkBugMessageAndExit() { AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle(getString(R.string.app_name)); builder.setMessage(getString(R.string.msg_camera_framework_bug)); builder.setPositiveButton(R.string.button_ok, new FinishListener(this)); builder.setOnCancelListener(new FinishListener(this)); builder.show(); } public void restartPreviewAfterDelay(long delayMS) { if (handler != null) { handler.sendEmptyMessageDelayed(R.id.restart_preview, delayMS); } resetStatusView(); } private void resetStatusView() { resultView.setVisibility(View.GONE); statusView.setText(R.string.msg_default_status); statusView.setVisibility(View.VISIBLE); viewfinderView.setVisibility(View.VISIBLE); lastResult = null; } public void drawViewfinder() { viewfinderView.drawViewfinder(); } }