added share button to account details

src/main/AndroidManifest.xml

@@ -204,6 +204,11 @@
                 android:name="android.support.FILE_PROVIDER_PATHS"
                 android:resource="@xml/file_paths" />
         </provider>
+        <provider
+            android:authorities="eu.siacs.conversations.barcodes"
+            android:name=".services.BarcodeProvider"
+            android:exported="false"
+            android:grantUriPermissions="true"/>
 
 
     </application>

src/main/java/eu/siacs/conversations/services/BarcodeProvider.java

@@ -0,0 +1,226 @@
+package eu.siacs.conversations.services;
+
+import android.annotation.TargetApi;
+import android.content.ComponentName;
+import android.content.ContentProvider;
+import android.content.ContentValues;
+import android.content.Context;
+import android.content.Intent;
+import android.content.ServiceConnection;
+import android.database.Cursor;
+import android.graphics.Bitmap;
+import android.graphics.Color;
+import android.net.Uri;
+import android.os.Build;
+import android.os.CancellationSignal;
+import android.os.IBinder;
+import android.os.ParcelFileDescriptor;
+import android.support.annotation.Nullable;
+import android.util.Log;
+
+import com.google.zxing.BarcodeFormat;
+import com.google.zxing.EncodeHintType;
+import com.google.zxing.aztec.AztecWriter;
+import com.google.zxing.common.BitMatrix;
+
+import java.io.BufferedOutputStream;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.Hashtable;
+
+import eu.siacs.conversations.Config;
+import eu.siacs.conversations.entities.Account;
+import eu.siacs.conversations.utils.CryptoHelper;
+import eu.siacs.conversations.xmpp.jid.InvalidJidException;
+import eu.siacs.conversations.xmpp.jid.Jid;
+
+public class BarcodeProvider extends ContentProvider implements ServiceConnection {
+
+    private static final String AUTHORITY = "eu.siacs.conversations.barcodes";
+
+    private final Object lock = new Object();
+
+    private XmppConnectionService mXmppConnectionService;
+
+    @Override
+    public boolean onCreate() {
+        File barcodeDirectory = new File(getContext().getCacheDir().getAbsolutePath() + "/barcodes/");
+        if (barcodeDirectory.exists() && barcodeDirectory.isDirectory()) {
+            for (File file : barcodeDirectory.listFiles()) {
+                if (file.isFile() && !file.isHidden()) {
+                    Log.d(Config.LOGTAG, "deleting old barcode file " + file.getAbsolutePath());
+                    file.delete();
+                }
+            }
+        }
+        return true;
+    }
+
+    @Nullable
+    @Override
+    public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
+        return null;
+    }
+
+    @Nullable
+    @Override
+    public String getType(Uri uri) {
+        return "image/png";
+    }
+
+    @Nullable
+    @Override
+    public Uri insert(Uri uri, ContentValues values) {
+        return null;
+    }
+
+    @Override
+    public int delete(Uri uri, String selection, String[] selectionArgs) {
+        return 0;
+    }
+
+    @Override
+    public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
+        return 0;
+    }
+
+    @Override
+    public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException {
+        return openFile(uri, mode, null);
+    }
+
+    @Override
+    public ParcelFileDescriptor openFile(Uri uri, String mode, CancellationSignal signal) throws FileNotFoundException {
+        Log.d(Config.LOGTAG, "opening file with uri (normal): " + uri.toString());
+        String path = uri.getPath();
+        if (path != null && path.endsWith(".png") && path.length() >= 5) {
+            String jid = path.substring(1).substring(0, path.length() - 4);
+            Log.d(Config.LOGTAG, "account:" + jid);
+            if (connectAndWait()) {
+                Log.d(Config.LOGTAG, "connected to background service");
+                try {
+                    Account account = mXmppConnectionService.findAccountByJid(Jid.fromString(jid));
+                    if (account != null) {
+                        String shareableUri = account.getShareableUri();
+                        String hash = CryptoHelper.getFingerprint(shareableUri);
+                        File file = new File(getContext().getCacheDir().getAbsolutePath() + "/barcodes/" + hash);
+                        if (!file.exists()) {
+                            file.getParentFile().mkdirs();
+                            file.createNewFile();
+                            Bitmap bitmap = createAztecBitmap(account.getShareableUri(), 1024);
+                            OutputStream outputStream = new FileOutputStream(file);
+                            bitmap.compress(Bitmap.CompressFormat.PNG, 100, outputStream);
+                            outputStream.close();
+                            outputStream.flush();
+                        }
+                        return ParcelFileDescriptor.open(file,ParcelFileDescriptor.MODE_READ_ONLY);
+                    }
+                } catch (Exception e) {
+                    throw new FileNotFoundException();
+                }
+            }
+        }
+        throw new FileNotFoundException();
+    }
+
+    private boolean connectAndWait() {
+        Intent intent = new Intent(getContext(), XmppConnectionService.class);
+        intent.setAction("contact_chooser");
+        Context context = getContext();
+        if (context != null) {
+            context.startService(intent);
+            context.bindService(intent, this, Context.BIND_AUTO_CREATE);
+            try {
+                waitForService();
+                Log.d(Config.LOGTAG, "service initialized");
+                return true;
+            } catch (InterruptedException e) {
+                return false;
+            }
+        } else {
+            Log.d(Config.LOGTAG, "context was null");
+            return false;
+        }
+    }
+
+    @Override
+    public void onServiceConnected(ComponentName name, IBinder service) {
+        XmppConnectionService.XmppConnectionBinder binder = (XmppConnectionService.XmppConnectionBinder) service;
+        mXmppConnectionService = binder.getService();
+        synchronized (this.lock) {
+            lock.notifyAll();
+        }
+    }
+
+    @Override
+    public void onServiceDisconnected(ComponentName name) {
+        mXmppConnectionService = null;
+    }
+
+    private void waitForService() throws InterruptedException {
+        if (mXmppConnectionService == null) {
+            synchronized (this.lock) {
+                lock.wait();
+            }
+        }
+    }
+
+    public static Uri getUriForAccount(Account account) {
+        return Uri.parse("content://" + AUTHORITY + "/" + account.getJid().toBareJid() + ".png");
+    }
+
+    public static Bitmap createAztecBitmap(String input, int size) {
+        try {
+            final AztecWriter AZTEC_WRITER = new AztecWriter();
+            final Hashtable<EncodeHintType, Object> hints = new Hashtable<>();
+            hints.put(EncodeHintType.ERROR_CORRECTION, 10);
+            final BitMatrix result = AZTEC_WRITER.encode(input, BarcodeFormat.AZTEC, size, size, hints);
+            final int width = result.getWidth();
+            final int height = result.getHeight();
+            final int[] pixels = new int[width * height];
+            for (int y = 0; y < height; y++) {
+                final int offset = y * width;
+                for (int x = 0; x < width; x++) {
+                    pixels[offset + x] = result.get(x, y) ? Color.BLACK : Color.TRANSPARENT;
+                }
+            }
+            final Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
+            bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
+            return bitmap;
+        } catch (final Exception e) {
+            return null;
+        }
+    }
+
+    static class TransferThread extends Thread {
+        InputStream in;
+        OutputStream out;
+
+        TransferThread(InputStream in, OutputStream out) {
+            this.in = in;
+            this.out = out;
+        }
+
+        @Override
+        public void run() {
+            byte[] buf = new byte[1024];
+            int len;
+
+            try {
+                while ((len = in.read(buf)) >= 0) {
+                    out.write(buf, 0, len);
+                }
+
+                in.close();
+                out.flush();
+                out.close();
+            } catch (IOException e) {
+                Log.e(Config.LOGTAG, "Exception transferring file", e);
+            }
+        }
+    }
+}

src/main/java/eu/siacs/conversations/ui/EditAccountActivity.java

@@ -46,6 +46,7 @@ import eu.siacs.conversations.R;
 import eu.siacs.conversations.crypto.axolotl.AxolotlService;
 import eu.siacs.conversations.crypto.axolotl.XmppAxolotlSession;
 import eu.siacs.conversations.entities.Account;
+import eu.siacs.conversations.services.BarcodeProvider;
 import eu.siacs.conversations.services.XmppConnectionService.OnCaptchaRequested;
 import eu.siacs.conversations.services.XmppConnectionService;
 import eu.siacs.conversations.services.XmppConnectionService.OnAccountUpdate;
@@ -703,6 +704,15 @@ public class EditAccountActivity extends OmemoActivity implements OnAccountUpdat
 			case R.id.action_server_info_show_more:
 				changeMoreTableVisibility(!item.isChecked());
 				break;
+			case R.id.action_share_barcode:
+				shareBarcode();
+				break;
+			case R.id.action_share_http:
+				shareLink(true);
+				break;
+			case R.id.action_share_uri:
+				shareLink(false);
+				break;
 			case R.id.action_change_password_on_server:
 				gotoChangePassword(null);
 				break;
@@ -722,6 +732,27 @@ public class EditAccountActivity extends OmemoActivity implements OnAccountUpdat
 		return super.onOptionsItemSelected(item);
 	}
 
+	private void shareLink(boolean http) {
+		Intent intent = new Intent(Intent.ACTION_SEND);
+		intent.setType("text/plain");
+		String text;
+		if (http) {
+			text = "https://conversations.im/i/"+mAccount.getJid().toBareJid().toString();
+		} else {
+			text = mAccount.getShareableUri();
+		}
+		intent.putExtra(Intent.EXTRA_TEXT,text);
+		startActivity(Intent.createChooser(intent, getText(R.string.share_with)));
+	}
+
+	private void shareBarcode() {
+		Intent intent = new Intent(Intent.ACTION_SEND);
+		intent.putExtra(Intent.EXTRA_STREAM,BarcodeProvider.getUriForAccount(mAccount));
+		intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
+		intent.setType("image/png");
+		startActivity(Intent.createChooser(intent, getText(R.string.share_with)));
+	}
+
 	private void changeMoreTableVisibility(boolean visible) {
 		mMoreTable.setVisibility(visible ? View.VISIBLE : View.GONE);
 	}

src/main/java/eu/siacs/conversations/ui/XmppActivity.java

@@ -78,6 +78,7 @@ import eu.siacs.conversations.entities.Message;
 import eu.siacs.conversations.entities.MucOptions;
 import eu.siacs.conversations.entities.Presences;
 import eu.siacs.conversations.services.AvatarService;
+import eu.siacs.conversations.services.BarcodeProvider;
 import eu.siacs.conversations.services.XmppConnectionService;
 import eu.siacs.conversations.services.XmppConnectionService.XmppConnectionBinder;
 import eu.siacs.conversations.utils.CryptoHelper;
@@ -1058,7 +1059,7 @@ public abstract class XmppActivity extends Activity {
 			Point size = new Point();
 			getWindowManager().getDefaultDisplay().getSize(size);
 			final int width = (size.x < size.y ? size.x : size.y);
-			Bitmap bitmap = createQrCodeBitmap(uri, width);
+			Bitmap bitmap = BarcodeProvider.createAztecBitmap(uri, width);
 			ImageView view = new ImageView(this);
 			view.setBackgroundColor(Color.WHITE);
 			view.setImageBitmap(bitmap);
@@ -1068,29 +1069,6 @@ public abstract class XmppActivity extends Activity {
 		}
 	}
 
-	protected Bitmap createQrCodeBitmap(String input, int size) {
-		try {
-			final AztecWriter AZTEC_WRITER = new AztecWriter();
-			final Hashtable<EncodeHintType, Object> hints = new Hashtable<>();
-			hints.put(EncodeHintType.ERROR_CORRECTION, 10);
-			final BitMatrix result = AZTEC_WRITER.encode(input, BarcodeFormat.AZTEC, size, size, hints);
-			final int width = result.getWidth();
-			final int height = result.getHeight();
-			final int[] pixels = new int[width * height];
-			for (int y = 0; y < height; y++) {
-				final int offset = y * width;
-				for (int x = 0; x < width; x++) {
-					pixels[offset + x] = result.get(x, y) ? Color.BLACK : Color.TRANSPARENT;
-				}
-			}
-			final Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
-			bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
-			return bitmap;
-		} catch (final Exception e) {
-			return null;
-		}
-	}
-
 	protected Account extractAccount(Intent intent) {
 		String jid = intent != null ? intent.getStringExtra(EXTRA_ACCOUNT) : null;
 		try {

src/main/java/eu/siacs/conversations/utils/CryptoHelper.java

@@ -206,9 +206,13 @@ public final class CryptoHelper {
 	}
 
 	public static String getAccountFingerprint(Account account) {
+		return getFingerprint(account.getJid().toBareJid().toString());
+	}
+
+	public static String getFingerprint(String value) {
 		try {
 			MessageDigest md = MessageDigest.getInstance("SHA-256");
-			return bytesToHex(md.digest(account.getJid().toBareJid().toString().getBytes("UTF-8")));
+			return bytesToHex(md.digest(value.getBytes("UTF-8")));
 		} catch (Exception e) {
 			return "";
 		}

src/main/res/menu/editaccount.xml

@@ -1,5 +1,21 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android">
 
+    <item android:id="@+id/action_share"
+        android:title="@string/share_uri_with"
+        android:icon="?attr/icon_share"
+        android:showAsAction="always">
+        <menu>
+            <item
+                android:id="@+id/action_share_barcode"
+                android:title="@string/share_as_barcode"/>
+            <item
+                android:id="@+id/action_share_uri"
+                android:title="@string/share_as_uri"/>
+            <item android:id="@+id/action_share_http"
+                android:title="@string/share_as_http"/>
+        </menu>
+    </item>
+
     <item
         android:id="@+id/action_change_presence"
         android:showAsAction="always"

src/main/res/values/strings.xml

@@ -707,4 +707,7 @@
 	<string name="verified_fingerprints">Verified fingerprints</string>
 	<string name="use_camera_icon_to_scan_barcode">Use the camera to scan a contacts barcode</string>
 	<string name="please_wait_for_keys_to_be_fetched">Please wait for keys to be fetched</string>
+	<string name="share_as_barcode">Share as Barcode</string>
+	<string name="share_as_uri">Share as XMPP URI</string>
+	<string name="share_as_http">Share as HTTP link</string>
 </resources>