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Java

/**
* 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 com.phonegap.plugins.barcodescanner;
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;
/**
* 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 BarcodeScanner 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 = "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";
private static final String LOG_TAG = "BarcodeScanner";
private String [] permissions = { Manifest.permission.CAMERA };
private JSONArray requestArgs;
private CallbackContext callbackContext;
/**
* Constructor.
*/
public BarcodeScanner() {
}
/**
* 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(SCAN)) {
//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));
}
}
}
// 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) {
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);
} catch (JSONException e) {
Log.d(LOG_TAG, "This should never happen");
}
//this.success(new PluginResult(PluginResult.Status.OK, obj), this.callback);
this.callbackContext.success(obj);
} 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(obj);
} 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;
}
}
}