Java tutorial
/** * PhoneGap is available under *either* the terms of the modified BSD license *or* the * MIT License (2008). See http://opensource.org/licenses/alphabetical for full text. * * Copyright (c) Matt Kane 2010 * Copyright (c) 2011, IBM Corporation * Copyright (c) 2013, Maciej Nux Jaros */ package org.cloudsky.cordovaPlugins; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import android.Manifest; import android.app.Activity; import android.content.Intent; import android.util.Log; import android.content.pm.PackageManager; import org.apache.cordova.CordovaPlugin; import org.apache.cordova.CallbackContext; import org.apache.cordova.PluginResult; import org.apache.cordova.PermissionHelper; import com.google.zxing.client.android.Intents; import android.widget.Toast; /** * This calls out to the ZXing barcode reader and returns the result. * * @sa https://github.com/apache/cordova-android/blob/master/framework/src/org/apache/cordova/CordovaPlugin.java */ public class BarcodeminCDV extends CordovaPlugin { public static final int REQUEST_CODE = 0x0ba7c0de; private static final String SCAN = "scan"; private static final String ENCODE = "encode"; private static final String CANCELLED = "cancelled"; private static final String FORMAT = "format"; private static final String TEXT = "text"; private static final String DATA = "data"; private static final String TYPE = "type"; private static final String PREFER_FRONTCAMERA = "preferFrontCamera"; private static final String ORIENTATION = "orientation"; private static final String SHOW_FLIP_CAMERA_BUTTON = "showFlipCameraButton"; private static final String FORMATS = "formats"; private static final String PROMPT = "prompt"; private static final String SCAN_INTENT = "com.google.zxing.client.android.SCAN"; private static final String ENCODE_DATA = "ENCODE_DATA"; private static final String ENCODE_TYPE = "ENCODE_TYPE"; private static final String ENCODE_INTENT = "org.cloudsky.cordovaPlugins.ENCODE"; private static final String TEXT_TYPE = "TEXT_TYPE"; private static final String EMAIL_TYPE = "EMAIL_TYPE"; private static final String PHONE_TYPE = "PHONE_TYPE"; private static final String SMS_TYPE = "SMS_TYPE"; private static final String LOG_TAG = "BarcodeminCDV"; private String[] permissions = { Manifest.permission.CAMERA }; private JSONArray requestArgs; private CallbackContext callbackContext; /** * Constructor. */ public BarcodeminCDV() { } /** * Executes the request. * * This method is called from the WebView thread. To do a non-trivial amount of work, use: * cordova.getThreadPool().execute(runnable); * * To run on the UI thread, use: * cordova.getActivity().runOnUiThread(runnable); * * @param action The action to execute. * @param args The exec() arguments. * @param callbackContext The callback context used when calling back into JavaScript. * @return Whether the action was valid. * * @sa https://github.com/apache/cordova-android/blob/master/framework/src/org/apache/cordova/CordovaPlugin.java */ @Override public boolean execute(String action, JSONArray args, CallbackContext callbackContext) { this.callbackContext = callbackContext; this.requestArgs = args; if (action.equals(ENCODE)) { JSONObject obj = args.optJSONObject(0); if (obj != null) { String type = obj.optString(TYPE); String data = obj.optString(DATA); // If the type is null then force the type to text if (type == null) { type = TEXT_TYPE; } if (data == null) { callbackContext.error("User did not specify data to encode"); return true; } encode(type, data); } else { callbackContext.error("User did not specify data to encode"); return true; } } else if (action.equals("scanBarcode")) { //android permission auto add if (!hasPermisssion()) { requestPermissions(0); } else { scan(args); } } else { return false; } return true; } /** * Starts an intent to scan and decode a barcode. */ public void scan(final JSONArray args) { final CordovaPlugin that = this; cordova.getThreadPool().execute(new Runnable() { public void run() { Intent intentScan = new Intent(SCAN_INTENT); intentScan.addCategory(Intent.CATEGORY_DEFAULT); // add config as intent extras if (args.length() > 0) { JSONObject obj; JSONArray names; String key; Object value; for (int i = 0; i < args.length(); i++) { try { obj = args.getJSONObject(i); } catch (JSONException e) { Log.i("CordovaLog", e.getLocalizedMessage()); continue; } names = obj.names(); for (int j = 0; j < names.length(); j++) { try { key = names.getString(j); value = obj.get(key); if (value instanceof Integer) { intentScan.putExtra(key, (Integer) value); } else if (value instanceof String) { intentScan.putExtra(key, (String) value); } } catch (JSONException e) { Log.i("CordovaLog", e.getLocalizedMessage()); } } intentScan.putExtra(Intents.Scan.CAMERA_ID, obj.optBoolean(PREFER_FRONTCAMERA, false) ? 1 : 0); intentScan.putExtra(Intents.Scan.SHOW_FLIP_CAMERA_BUTTON, obj.optBoolean(SHOW_FLIP_CAMERA_BUTTON, false)); if (obj.has(FORMATS)) { intentScan.putExtra(Intents.Scan.FORMATS, obj.optString(FORMATS)); } if (obj.has(PROMPT)) { intentScan.putExtra(Intents.Scan.PROMPT_MESSAGE, obj.optString(PROMPT)); } //if (obj.has(ORIENTATION)) { //intentScan.putExtra(Intents.Scan.ORIENTATION_LOCK, obj.optString(ORIENTATION)); intentScan.putExtra(Intents.Scan.ORIENTATION_LOCK, "false"); //} } } // avoid calling other phonegap apps intentScan.setPackage(that.cordova.getActivity().getApplicationContext().getPackageName()); that.cordova.startActivityForResult(that, intentScan, REQUEST_CODE); } }); } /** * Called when the barcode scanner intent completes. * * @param requestCode The request code originally supplied to startActivityForResult(), * allowing you to identify who this result came from. * @param resultCode The integer result code returned by the child activity through its setResult(). * @param intent An Intent, which can return result data to the caller (various data can be attached to Intent "extras"). */ @Override public void onActivityResult(int requestCode, int resultCode, Intent intent) { String res = ""; if (requestCode == REQUEST_CODE && this.callbackContext != null) { if (resultCode == Activity.RESULT_OK) { JSONObject obj = new JSONObject(); try { obj.put(TEXT, intent.getStringExtra("SCAN_RESULT")); obj.put(FORMAT, intent.getStringExtra("SCAN_RESULT_FORMAT")); obj.put(CANCELLED, false); res = intent.getStringExtra("SCAN_RESULT"); } catch (JSONException e) { Log.d(LOG_TAG, "This should never happen"); } //this.success(new PluginResult(PluginResult.Status.OK, obj), this.callback); this.callbackContext.success(res); } else if (resultCode == Activity.RESULT_CANCELED) { JSONObject obj = new JSONObject(); try { obj.put(TEXT, ""); obj.put(FORMAT, ""); obj.put(CANCELLED, true); } catch (JSONException e) { Log.d(LOG_TAG, "This should never happen"); } //this.success(new PluginResult(PluginResult.Status.OK, obj), this.callback); this.callbackContext.success(res); } else { //this.error(new PluginResult(PluginResult.Status.ERROR), this.callback); this.callbackContext.error("Unexpected error"); } } } /** * Initiates a barcode encode. * * @param type Endoiding type. * @param data The data to encode in the bar code. */ public void encode(String type, String data) { Intent intentEncode = new Intent(ENCODE_INTENT); intentEncode.putExtra(ENCODE_TYPE, type); intentEncode.putExtra(ENCODE_DATA, data); // avoid calling other phonegap apps intentEncode.setPackage(this.cordova.getActivity().getApplicationContext().getPackageName()); this.cordova.getActivity().startActivity(intentEncode); } /** * check application's permissions */ public boolean hasPermisssion() { for (String p : permissions) { if (!PermissionHelper.hasPermission(this, p)) { return false; } } return true; } /** * We override this so that we can access the permissions variable, which no longer exists in * the parent class, since we can't initialize it reliably in the constructor! * * @param requestCode The code to get request action */ public void requestPermissions(int requestCode) { PermissionHelper.requestPermissions(this, requestCode, permissions); } /** * processes the result of permission request * * @param requestCode The code to get request action * @param permissions The collection of permissions * @param grantResults The result of grant */ public void onRequestPermissionResult(int requestCode, String[] permissions, int[] grantResults) throws JSONException { PluginResult result; for (int r : grantResults) { if (r == PackageManager.PERMISSION_DENIED) { Log.d(LOG_TAG, "Permission Denied!"); result = new PluginResult(PluginResult.Status.ILLEGAL_ACCESS_EXCEPTION); this.callbackContext.sendPluginResult(result); return; } } switch (requestCode) { case 0: scan(this.requestArgs); break; } } }