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/*
* Copyright (C) 2008 Google Inc.
*
* 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.android.barcodes;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.http.AndroidHttpClient;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.provider.Contacts;
import android.util.Log;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import java.net.URI;
public class QRCodeEncoder {
private static final String TAG = "QRCodeEncoder";
private static final String CHART_SERVER_URL = "//chart.apis.google.com/chart?cht=qr&chs=";
private Activity mActivity;
private String mContents;
private String mDisplayContents;
private String mTitle;
private NetworkThread mNetworkThread;
public QRCodeEncoder(Activity activity, Intent intent) {
mActivity = activity;
if (!encodeContents(intent)) {
throw new IllegalArgumentException("No valid data to encode.");
}
}
// Once the core ZXing library supports encoding, we'll be able to generate the bitmap
// synchronously. For now, it's a network request, so it's handled on a thread.
public void requestBarcode(Handler handler, int pixelResolution) {
mNetworkThread = new NetworkThread(mContents, handler, pixelResolution);
mNetworkThread.start();
}
public String getContents() {
return mContents;
}
public String getDisplayContents() {
return mDisplayContents;
}
public String getTitle() {
return mTitle;
}
// Perhaps the string encoding should live in the core ZXing library too.
private boolean encodeContents(Intent intent) {
if (intent == null) return false;
String type = intent.getStringExtra(Intents.Encode.TYPE);
if (type == null || type.length() == 0) return false;
if (type.equals(Contents.Type.TEXT)) {
String string = intent.getStringExtra(Intents.Encode.DATA);
if (string != null && string.length() > 0) {
mContents = string;
mDisplayContents = string;
mTitle = mActivity.getString(R.string.contents_text);
}
} else if (type.equals(Contents.Type.EMAIL)) {
String string = intent.getStringExtra(Intents.Encode.DATA);
if (string != null && string.length() > 0) {
mContents = "mailto:" + string;
mDisplayContents = string;
mTitle = mActivity.getString(R.string.contents_email);
}
} else if (type.equals(Contents.Type.PHONE)) {
String string = intent.getStringExtra(Intents.Encode.DATA);
if (string != null && string.length() > 0) {
mContents = "tel:" + string;
mDisplayContents = string;
mTitle = mActivity.getString(R.string.contents_phone);
}
} else if (type.equals(Contents.Type.SMS)) {
String string = intent.getStringExtra(Intents.Encode.DATA);
if (string != null && string.length() > 0) {
mContents = "sms:" + string;
mDisplayContents = string;
mTitle = mActivity.getString(R.string.contents_sms);
}
} else if (type.equals(Contents.Type.CONTACT)) {
Bundle bundle = intent.getBundleExtra(Intents.Encode.DATA);
if (bundle != null) {
String name = bundle.getString(Contacts.Intents.Insert.NAME);
if (name != null && !name.equals("")) {
mContents = "MECARD:N:" + name + ";";
mDisplayContents = name;
String phone = bundle.getString(Contacts.Intents.Insert.PHONE);
if (phone != null && !phone.equals("")) {
mContents += "TEL:" + phone + ";";
mDisplayContents += "\n" + phone;
}
String email = bundle.getString(Contacts.Intents.Insert.EMAIL);
if (email != null && !email.equals("")) {
mContents += "EMAIL:" + email + ";";
mDisplayContents += "\n" + email;
}
mContents += ";";
mTitle = mActivity.getString(R.string.contents_contact);
}
}
} else if (type.equals(Contents.Type.LOCATION)) {
Bundle bundle = intent.getBundleExtra(Intents.Encode.DATA);
if (bundle != null) {
float latitude = bundle.getFloat("LAT", Float.MAX_VALUE);
float longitude = bundle.getFloat("LONG", Float.MAX_VALUE);
if (latitude != Float.MAX_VALUE && longitude != Float.MAX_VALUE) {
mContents = "geo:" + latitude + "," + longitude;
mDisplayContents = latitude + "," + longitude;
mTitle = mActivity.getString(R.string.contents_location);
}
}
}
return mContents != null && mContents.length() > 0;
}
private class NetworkThread extends Thread {
private String mContents;
private Handler mHandler;
private int mPixelResolution;
public NetworkThread(String contents, Handler handler, int pixelResolution) {
mContents = contents;
mHandler = handler;
mPixelResolution = pixelResolution;
}
public void run() {
String url = CHART_SERVER_URL + mPixelResolution + "x" + mPixelResolution + "&chl=" +
mContents;
try {
URI uri = new URI("http", url, null);
HttpGet get = new HttpGet(uri);
AndroidHttpClient client = AndroidHttpClient.newInstance("Android-Barcodes/0.1");
HttpResponse response = client.execute(get);
HttpEntity entity = response.getEntity();
Bitmap image = BitmapFactory.decodeStream(entity.getContent());
if (image != null) {
Message message = Message.obtain(mHandler, R.id.encode_succeeded);
message.obj = image;
message.sendToTarget();
} else {
Log.e(TAG, "Could not decode png from the network");
Message message = Message.obtain(mHandler, R.id.encode_failed);
message.sendToTarget();
}
} catch (Exception e) {
Log.e(TAG, e.toString());
Message message = Message.obtain(mHandler, R.id.encode_failed);
message.sendToTarget();
}
}
}
}
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