import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
-import android.graphics.BitmapFactory;
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 org.apache.http.client.methods.HttpUriRequest;
-
-import java.net.URI;
+import com.google.zxing.BarcodeFormat;
+import com.google.zxing.MultiFormatWriter;
+import com.google.zxing.WriterException;
+import com.google.zxing.common.ByteMatrix;
public final class QRCodeEncoder {
private String mContents;
private String mDisplayContents;
private String mTitle;
- private String mUserAgent;
public QRCodeEncoder(Activity activity, Intent intent) {
mActivity = activity;
if (!encodeContents(intent)) {
throw new IllegalArgumentException("No valid data to encode.");
}
- mUserAgent = mActivity.getString(R.string.zxing_user_agent);
}
- // 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) {
- Thread mNetworkThread = new NetworkThread(mContents, handler, pixelResolution);
- mNetworkThread.start();
+ Thread encodeThread = new EncodeThread(mContents, handler, pixelResolution);
+ encodeThread.start();
}
public String getContents() {
return mTitle;
}
- // Perhaps the string encoding should live in the core ZXing library too.
+ // TODO: The string encoding should live in the core ZXing library.
private boolean encodeContents(Intent intent) {
if (intent == null) return false;
String type = intent.getStringExtra(Intents.Encode.TYPE);
return mContents != null && mContents.length() > 0;
}
- private final class NetworkThread extends Thread {
+ private final static class EncodeThread extends Thread {
private final String mContents;
private final Handler mHandler;
private final int mPixelResolution;
- public NetworkThread(String contents, Handler handler, int pixelResolution) {
+ public EncodeThread(String contents, Handler handler, int pixelResolution) {
mContents = contents;
mHandler = handler;
mPixelResolution = pixelResolution;
}
public final void run() {
- AndroidHttpClient client = null;
try {
- URI uri = new URI("http", null, "chart.apis.google.com", -1, "/chart",
- "cht=qr&chs=" + mPixelResolution + "x" + mPixelResolution + "&chl=" + mContents, null);
- HttpUriRequest get = new HttpGet(uri);
- client = AndroidHttpClient.newInstance(mUserAgent);
- 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();
+ ByteMatrix result = new MultiFormatWriter().encode(mContents, BarcodeFormat.QR_CODE,
+ mPixelResolution, mPixelResolution);
+ int width = result.width();
+ int height = result.height();
+ byte[][] array = result.getArray();
+ int[] pixels = new int[width * height];
+ for (int y = 0; y < height; y++) {
+ for (int x = 0; x < width; x++) {
+ int grey = array[y][x] & 0xff;
+ pixels[y * width + x] = (0xff << 24) | (grey << 16) | (grey << 8) | grey;
+ }
}
- } catch (Exception e) {
+
+ Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
+ bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
+ Message message = Message.obtain(mHandler, R.id.encode_succeeded);
+ message.obj = bitmap;
+ message.sendToTarget();
+ } catch (WriterException e) {
+ Log.e(TAG, e.toString());
+ Message message = Message.obtain(mHandler, R.id.encode_failed);
+ message.sendToTarget();
+ } catch (IllegalArgumentException e) {
Log.e(TAG, e.toString());
Message message = Message.obtain(mHandler, R.id.encode_failed);
message.sendToTarget();
- } finally {
- if (client != null) {
- client.close();
- }
}
}
}