From a89e4143c01c4b60ad7315c1810af4705e74cfe1 Mon Sep 17 00:00:00 2001
From: Hans-Christoph Steiner <hans@eds.org>
Date: Fri, 2 May 2014 13:11:33 -0400
Subject: [PATCH] QR Code image generation into AsyncTask to keep things snappy

Generating the QR Code image can take some time, so do it in an AsyncTask
which then updates the ImageView once the QRCode is complete.  This will be
used for the kerplapp repo swapping process.

refs #3204 https://dev.guardianproject.info/issues/3204
refs #3201 https://dev.guardianproject.info/issues/3201
---
 src/org/fdroid/fdroid/QrGenAsyncTask.java | 73 +++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 src/org/fdroid/fdroid/QrGenAsyncTask.java

diff --git a/src/org/fdroid/fdroid/QrGenAsyncTask.java b/src/org/fdroid/fdroid/QrGenAsyncTask.java
new file mode 100644
index 000000000..ef2f62787
--- /dev/null
+++ b/src/org/fdroid/fdroid/QrGenAsyncTask.java
@@ -0,0 +1,73 @@
+
+package org.fdroid.fdroid;
+
+import android.annotation.TargetApi;
+import android.app.Activity;
+import android.graphics.Bitmap;
+import android.graphics.Point;
+import android.os.AsyncTask;
+import android.os.Build;
+import android.util.Log;
+import android.view.Display;
+import android.widget.ImageView;
+
+import com.google.zxing.BarcodeFormat;
+import com.google.zxing.WriterException;
+import com.google.zxing.encode.Contents;
+import com.google.zxing.encode.QRCodeEncoder;
+
+public class QrGenAsyncTask extends AsyncTask<String, Void, Void> {
+    private static final String TAG = "QrGenAsyncTask";
+
+    private Activity activity;
+    private int viewId;
+    private Bitmap qrBitmap;
+
+    public QrGenAsyncTask(Activity activity, int viewId) {
+        this.activity = activity;
+        this.viewId = viewId;
+    }
+
+    /*
+     * The method for getting screen dimens changed, so this uses both the
+     * deprecated one and the 13+ one, and supports all Android versions.
+     */
+    @SuppressWarnings("deprecation")
+    @TargetApi(13)
+    @Override
+    protected Void doInBackground(String... s) {
+        String qrData = s[0];
+        Display display = activity.getWindowManager().getDefaultDisplay();
+        Point outSize = new Point();
+        int x, y, qrCodeDimension;
+        /* lame, got to use both the new and old APIs here */
+        if (Build.VERSION.SDK_INT >= 13) {
+            display.getSize(outSize);
+            x = outSize.x;
+            y = outSize.y;
+        } else {
+            x = display.getWidth();
+            y = display.getHeight();
+        }
+        if (x < y)
+            qrCodeDimension = x;
+        else
+            qrCodeDimension = y;
+        Log.i(TAG, "generating QRCode Bitmap of " + qrCodeDimension + "x" + qrCodeDimension);
+        QRCodeEncoder qrCodeEncoder = new QRCodeEncoder(qrData, null,
+                Contents.Type.TEXT, BarcodeFormat.QR_CODE.toString(), qrCodeDimension);
+
+        try {
+            qrBitmap = qrCodeEncoder.encodeAsBitmap();
+        } catch (WriterException e) {
+            Log.e(TAG, e.getMessage());
+        }
+        return (Void) null;
+    }
+
+    @Override
+    protected void onPostExecute(Void v) {
+        ImageView qrCodeImageView = (ImageView) activity.findViewById(viewId);
+        qrCodeImageView.setImageBitmap(qrBitmap);
+    }
+}