Java tutorial
/* * Copyright (C) 2008 ZXing authors * Copyright (C) 2011 Agiro authors * * This file is mostly based on * com.google.zxing.client.android.CaptureActivity * by 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.agiro.scanner.android; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.Reader; import java.io.StringWriter; import java.io.Writer; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.message.BasicNameValuePair; import android.app.ListActivity; import android.graphics.Bitmap; import android.media.MediaPlayer; import android.os.Bundle; import android.os.Handler; import android.util.Log; 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.view.View.OnClickListener; import android.widget.Button; import android.widget.ImageView; import android.widget.ListView; import android.widget.SimpleAdapter; import com.agiro.scanner.android.camera.CameraManager; /** * The main activity. Draws the views and shows the results in them. */ public final class CaptureActivity extends ListActivity implements SurfaceHolder.Callback { private static final String TAG = "aGiro.CaptureActivity"; private static final long INTENT_RESULT_DURATION = 1500L; private static final long BULK_MODE_SCAN_DELAY_MS = 1000L; private static final float BEEP_VOLUME = 0.10f; private static final long VIBRATE_DURATION = 200L; private static final String PACKAGE_NAME = "com.agiro.scanner.android"; private CaptureActivityHandler handler; private ViewfinderView viewfinderView; private MediaPlayer mediaPlayer; private boolean hasSurface; private boolean playBeep; private boolean vibrate; private boolean copyToClipboard; // private InactivityTimer inactivityTimer; private static final ArrayList<HashMap<String, String>> list = new ArrayList<HashMap<String, String>>(); private static String reference = null; private static String amount = null; private static String account = null; private static String debug = null; private Button eraseButton; private Button sendButton; private Button scanButton; /* * When the beep has finished playing, rewind to queue up another one. * private final OnCompletionListener beepListener = new OnCompletionListener() { public void onCompletion(MediaPlayer mediaPlayer) { mediaPlayer.seekTo(0); } }; */ /* private final DialogInterface.OnClickListener aboutListener = new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialogInterface, int i) { Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.zxing_url))); intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET); startActivity(intent); } }; */ @Override protected void onListItemClick(ListView l, View v, int position, long id) { super.onListItemClick(l, v, position, id); if (position == 0) { reference = null; } else if (position == 1) { amount = null; } else if (position == 2) { account = null; } else { debug = null; } populateList(reference, amount, account, debug); onContentChanged(); } ViewfinderView getViewfinderView() { return viewfinderView; } public Handler getHandler() { return handler; } @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); Log.d(TAG, "onCreate"); Window window = getWindow(); window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); setContentView(R.layout.capture); this.eraseButton = (Button) this.findViewById(R.id.erase); this.eraseButton.setOnClickListener(new OnClickListener() { public void onClick(View v) { reference = null; amount = null; account = null; debug = null; populateList(reference, amount, account, debug); onContentChanged(); } }); this.sendButton = (Button) this.findViewById(R.id.send); this.sendButton.setOnClickListener(new OnClickListener() { public void onClick(View v) { } }); this.scanButton = (Button) this.findViewById(R.id.scan); this.scanButton.setOnClickListener(new OnClickListener() { public void onClick(View v) { handler.sendEmptyMessage(R.id.restart_preview); } }); SimpleAdapter adapter = new SimpleAdapter(this, list, R.layout.result_list_item, new String[] { "data_type", "data" }, new int[] { R.id.data_type, R.id.data }); populateList(reference, amount, account, debug); setListAdapter(adapter); CameraManager.init(getApplication()); viewfinderView = (ViewfinderView) findViewById(R.id.viewfinder_view); handler = null; hasSurface = false; // inactivityTimer = new InactivityTimer(this); } @Override protected void onResume() { super.onResume(); resetStatusView(); Log.d(TAG, "onResume"); 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); } } /* SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); playBeep = prefs.getBoolean(PreferencesActivity.KEY_PLAY_BEEP, true); if (playBeep) { // See if sound settings overrides this AudioManager audioService = (AudioManager) getSystemService(AUDIO_SERVICE); if (audioService.getRingerMode() != AudioManager.RINGER_MODE_NORMAL) { playBeep = false; } } vibrate = prefs.getBoolean(PreferencesActivity.KEY_VIBRATE, false); copyToClipboard = prefs.getBoolean(PreferencesActivity.KEY_COPY_TO_CLIPBOARD, true); initBeepSound(); */ @Override protected void onPause() { super.onPause(); if (handler != null) { handler.quitSynchronously(); handler = null; } CameraManager.get().closeDriver(); } @Override protected void onDestroy() { // inactivityTimer.shutdown(); super.onDestroy(); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_SEARCH) { handler.sendEmptyMessage(R.id.restart_preview); } return super.onKeyDown(keyCode, event); } public void surfaceCreated(SurfaceHolder holder) { if (!hasSurface) { hasSurface = true; initCamera(holder); } } public void surfaceDestroyed(SurfaceHolder holder) { hasSurface = false; } public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } public void handleDecode(Invoice invoice, Bitmap debugBmp) { // inactivityTimer.onActivity(); // playBeepSoundAndVibrate(); ImageView debugImageView = (ImageView) findViewById(R.id.debug_image_view); debugImageView.setImageBitmap(debugBmp); Log.v(TAG, "Got invoice " + invoice); if (invoice.isComplete()) { new Thread(new Runnable() { public void run() { AppEngineClient aec = new AppEngineClient(CaptureActivity.this, "patrik.akerfeldt@gmail.com"); List<NameValuePair> params = new ArrayList<NameValuePair>(); params.add(new BasicNameValuePair("reference", "12345678")); try { Writer w = new StringWriter(); HttpResponse res = aec.makeRequest("/add", params); Reader reader = new BufferedReader( new InputStreamReader(res.getEntity().getContent(), "UTF-8")); int n; char[] buffer = new char[1024]; while ((n = reader.read(buffer)) != -1) { w.write(buffer, 0, n); } Log.e(TAG, "Got: " + w.toString()); } catch (Exception e) { Log.e(TAG, e.getMessage(), e); } } }).start(); } //TODO: the isValidCC checking should be optional // if (resultMap.containsKey("reference")) { // String str = resultMap.get("reference").toString(); // if (StringDecoder.isValidCC(str)) { // new Thread(new Runnable() { // // public void run() { // AppEngineClient aec = new AppEngineClient(CaptureActivity.this, "patrik.akerfeldt@gmail.com"); // List<NameValuePair> params = new ArrayList<NameValuePair>(); // params.add(new BasicNameValuePair("reference", "12345678")); // try { // Writer w = new StringWriter(); // HttpResponse res = aec.makeRequest("/add", params); // Reader reader = new BufferedReader(new InputStreamReader(res.getEntity().getContent(), "UTF-8")); // int n; // char[] buffer = new char[1024]; // while ((n = reader.read(buffer)) != -1) { // w.write(buffer, 0, n); // } // Log.e(TAG, "Got: " + w.toString()); // } catch (Exception e) { // Log.e(TAG, e.getMessage(), e); // } // // } // }).start(); // reference = str; // } // } // if (resultMap.containsKey("amount")) { // String str = resultMap.get("amount").toString(); // if (StringDecoder.isValidCC(str)) { // str = str.substring(0,str.length()-1); // str = new StringBuffer(str).insert((str.length()-2), ",").toString(); // amount = str; // } // } // if (resultMap.containsKey("account")) { // String str = resultMap.get("account").toString(); // if (StringDecoder.isValidCC(str)) { // account = str; // } // } // if (resultMap.containsKey("debug")) { // debug = resultMap.get("debug").toString(); // } populateList(invoice.getReference(), invoice.getCompleteAmount(), invoice.getGiroAccount(), "NOT SUPPORTED"); onContentChanged(); } /* * Creates the beep MediaPlayer in advance so that the sound can be triggered with the least * latency possible. * private void initBeepSound() { if (playBeep && mediaPlayer == null) { // The volume on STREAM_SYSTEM is not adjustable, and users found it too loud, // so we now play on the music stream. setVolumeControlStream(AudioManager.STREAM_MUSIC); mediaPlayer = new MediaPlayer(); mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); mediaPlayer.setOnCompletionListener(beepListener); AssetFileDescriptor file = getResources().openRawResourceFd(R.raw.beep); try { mediaPlayer.setDataSource(file.getFileDescriptor(), file.getStartOffset(), file.getLength()); file.close(); mediaPlayer.setVolume(BEEP_VOLUME, BEEP_VOLUME); mediaPlayer.prepare(); } catch (IOException e) { mediaPlayer = null; } } } private void playBeepSoundAndVibrate() { if (playBeep && mediaPlayer != null) { mediaPlayer.start(); } if (vibrate) { Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE); vibrator.vibrate(VIBRATE_DURATION); } } */ private void initCamera(SurfaceHolder surfaceHolder) { try { CameraManager.get().openDriver(surfaceHolder); } catch (IOException ioe) { Log.w(TAG, ioe); return; } 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 initializating camera", e); return; } if (handler == null) { handler = new CaptureActivityHandler(this); } } private void resetStatusView() { viewfinderView.setVisibility(View.VISIBLE); } public void drawViewfinder() { viewfinderView.drawViewfinder(); } //TODO: all this should be done in a database probably private void populateList(String reference, String amount, String account, String debug) { list.clear(); HashMap<String, String> temp = new HashMap<String, String>(); temp.put("data_type", "Referensnummer:"); temp.put("data", reference); list.add(temp); HashMap<String, String> temp1 = new HashMap<String, String>(); temp1.put("data_type", "Belopp:"); temp1.put("data", amount); list.add(temp1); HashMap<String, String> temp2 = new HashMap<String, String>(); temp2.put("data_type", "Kontonummer:"); temp2.put("data", account); list.add(temp2); HashMap<String, String> temp3 = new HashMap<String, String>(); temp3.put("data_type", "Debug:"); temp3.put("data", debug); list.add(temp3); } }