custom ACRA sender to put stacktrace title in email Subject:

This should hopefully make it easier to sort through the emails.

app/src/main/java/org/fdroid/fdroid/FDroidApp.java

@@ -71,7 +71,8 @@ import sun.net.www.protocol.bluetooth.Handler;
 
 @ReportsCrashes(mailTo = "reports@f-droid.org",
         mode = ReportingInteractionMode.DIALOG,
-                reportDialogClass = CrashReportActivity.class
+        reportDialogClass = CrashReportActivity.class,
+        reportSenderFactoryClasses = org.fdroid.fdroid.acra.CrashReportSenderFactory.class
 )
 public class FDroidApp extends Application {
 

app/src/main/java/org/fdroid/fdroid/acra/CrashReportSender.java

@@ -0,0 +1,67 @@
+
+package org.fdroid.fdroid.acra;
+
+import android.content.Context;
+import android.content.Intent;
+import android.net.Uri;
+import android.support.annotation.NonNull;
+
+import org.acra.ACRAConstants;
+import org.acra.ReportField;
+import org.acra.collections.ImmutableSet;
+import org.acra.collector.CrashReportData;
+import org.acra.config.ACRAConfiguration;
+import org.acra.sender.ReportSender;
+import org.acra.sender.ReportSenderException;
+
+import java.util.Iterator;
+
+public class CrashReportSender implements ReportSender {
+
+    private final ACRAConfiguration config;
+
+    public CrashReportSender(ACRAConfiguration config) {
+        this.config = config;
+    }
+
+    public void send(@NonNull Context context, @NonNull CrashReportData errorContent)
+            throws ReportSenderException {
+        Intent emailIntent = new Intent("android.intent.action.SENDTO");
+        emailIntent.setData(Uri.fromParts("mailto", this.config.mailTo(), (String) null));
+        emailIntent.addFlags(268435456);
+        String[] subjectBody = this.buildSubjectBody(context, errorContent);
+        emailIntent.putExtra("android.intent.extra.SUBJECT", subjectBody[0]);
+        emailIntent.putExtra("android.intent.extra.TEXT", subjectBody[1]);
+        context.startActivity(emailIntent);
+    }
+
+    private String[] buildSubjectBody(Context context, CrashReportData errorContent) {
+        ImmutableSet fields = this.config.getReportFields();
+        if (fields.isEmpty()) {
+            fields = new ImmutableSet<ReportField>(ACRAConstants.DEFAULT_MAIL_REPORT_FIELDS);
+        }
+
+        String subject = context.getPackageName() + " Crash Report";
+        StringBuilder builder = new StringBuilder();
+        Iterator var4 = fields.iterator();
+
+        while (var4.hasNext()) {
+            ReportField field = (ReportField) var4.next();
+            builder.append(field.toString()).append('=');
+            builder.append(errorContent.get(field));
+            builder.append('\n');
+            if ("STACK_TRACE".equals(field.toString())) {
+                String stackTrace = errorContent.get(field);
+                if (stackTrace != null) {
+                    subject = context.getPackageName() + ": "
+                            + stackTrace.substring(0, stackTrace.indexOf('\n'));
+                    if (subject.length() > 72) {
+                        subject = subject.substring(0, 72);
+                    }
+                }
+            }
+        }
+
+        return new String[]{subject, builder.toString()};
+    }
+}

app/src/main/java/org/fdroid/fdroid/acra/CrashReportSenderFactory.java

@@ -0,0 +1,16 @@
+package org.fdroid.fdroid.acra;
+
+import android.content.Context;
+import android.support.annotation.NonNull;
+
+import org.acra.config.ACRAConfiguration;
+import org.acra.sender.ReportSender;
+import org.acra.sender.ReportSenderFactory;
+
+public class CrashReportSenderFactory implements ReportSenderFactory {
+    @NonNull
+    @Override
+    public ReportSender create(@NonNull Context context, @NonNull ACRAConfiguration acraConfiguration) {
+        return new CrashReportSender(acraConfiguration);
+    }
+}