com.google.zxing.BarcodeScanner.java Source code

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Here is the source code for com.google.zxing.BarcodeScanner.java

Source

/**
* 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.google.zxing;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.content.Intent;
import android.util.Log;

import org.apache.cordova.CordovaPlugin;
import org.apache.cordova.PluginResult;

/**
* This calls out to the ZXing barcode reader and returns the result.
*/
public class BarcodeScanner extends CordovaPlugin {
    private static final String SCAN = "scan";
    private static final String CANCELLED = "cancelled";
    private static final String FORMAT = "format";
    private static final String TEXT = "text";
    private static final String SCAN_INTENT = "com.phonegap.plugins.barcodescanner.SCAN";

    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(SCAN)) {
            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.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);
            }
        }
    }
}