/**
* 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
*/
package com.phonegap.plugins.barcodescanner;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
//import android.util.Log;
import org.apache.cordova.api.Plugin;
import org.apache.cordova.api.PluginResult;
/**
* This calls out to the ZXing barcode reader and returns the result.
*/
public class BarcodeScanner extends Plugin {
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 SCAN_INTENT = "com.google.zxing.client.android.SCAN"; //"com.phonegap.plugins.barcodescanner.SCAN";
private static final String SCAN_PACK = "com.google.zxing.client.android";
private static final String ENCODE_DATA = "ENCODE_DATA";
private static final String ENCODE_TYPE = "ENCODE_TYPE";
private static final String ENCODE_INTENT = "com.google.zxing.client.android.ENCODE";//"com.phonegap.plugins.barcodescanner.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";
public static final int REQUEST_CODE = 0x0ba7c0de;
public String callback;
/**
* Constructor.
*/
public BarcodeScanner() {
}
/**
* Executes the request and returns PluginResult.
*
* @param action The action to execute.
* @param args JSONArray of arguments for the plugin.
* @param callbackId The callback id used when calling back into JavaScript.
* @return A PluginResult object with a status and message.
*/
public PluginResult execute(String action, JSONArray args, String callbackId) {
this.callback = callbackId;
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) {
return new PluginResult(PluginResult.Status.ERROR, "User did not specify data to encode");
}
//verify pack
if( this.isIntentAvailable(this.cordova.getActivity().getApplicationContext(), ENCODE_INTENT) == false ){
return new PluginResult(PluginResult.Status.ERROR, "BarcodeScanner App not available!, Please Install the app and try new.");
} else {
encode(type, data);
}
} else {
return new PluginResult(PluginResult.Status.ERROR, "User did not specify data to encode");
}
}
else if (action.equals(SCAN)) {
if( this.isIntentAvailable(this.cordova.getActivity().getApplicationContext(), SCAN_INTENT) == false ){
return new PluginResult(PluginResult.Status.ERROR, "1-BarcodeScanner App not available!, Please Install the app and try new.");
} else {
scan();
}
} else {
return new PluginResult(PluginResult.Status.INVALID_ACTION);
}
PluginResult r = new PluginResult(PluginResult.Status.NO_RESULT);
r.setKeepCallback(true);
return r;
}
/**
* Starts an intent to scan and decode a barcode.
*/
public void scan() {
Intent intentScan = new Intent(SCAN_INTENT);
intentScan.setPackage(SCAN_PACK);
//change mode for you requeriments
intentScan.putExtra("SCAN_MODE", "PRODUCT_MODE");
intentScan.addCategory(Intent.CATEGORY_DEFAULT);
this.cordova.startActivityForResult((Plugin) this, 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").
*/
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
if (requestCode == REQUEST_CODE) {
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);
} catch(JSONException e) {
//Log.d(LOG_TAG, "This should never happen");
}
this.success(new PluginResult(PluginResult.Status.OK, obj), this.callback);
} 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);
} else {
this.error(new PluginResult(PluginResult.Status.ERROR), this.callback);
}
}
}
/**
* Initiates a barcode encode.
* @param data The data to encode in the bar code
* @param data2
*/
public void encode(String type, String data) {
Intent intentEncode = new Intent(ENCODE_INTENT);
intentEncode.putExtra(ENCODE_TYPE, type);
intentEncode.putExtra(ENCODE_DATA, data);
this.cordova.getActivity().startActivity(intentEncode);
}
//http://android-developers.blogspot.mx/2009/01/can-i-use-this-intent.html
/**
* Indicates whether the specified action can be used as an intent. This
* method queries the package manager for installed packages that can
* respond to an intent with the specified action. If no suitable package is
* found, this method returns false.
*
* @param context The application's environment.
* @param action The Intent action to check for availability.
*
* @return True if an Intent with the specified action can be sent and
* responded to, false otherwise.
*/
private boolean isIntentAvailable(Context context, String action) {
final PackageManager packageManager = context.getPackageManager();
final Intent intent = new Intent(action);
List<ResolveInfo> list =
packageManager.queryIntentActivities(intent,
PackageManager.MATCH_DEFAULT_ONLY);
return list.size() > 0;
}
}