From 641619f7c1d8a0f51b96666d14e8aa56023fc2f3 Mon Sep 17 00:00:00 2001
From: Stuart Kent <stkent@users.noreply.github.com>
Date: Thu, 20 Apr 2017 09:34:44 -0500
Subject: [PATCH] Toast rather than crash when sharing giant traces (#31)

---
 .../com/github/pedrovgs/lynx/LynxView.java    | 37 ++++++++++++++++---
 .../lynx/presenter/LynxPresenter.java         | 10 ++++-
 2 files changed, 40 insertions(+), 7 deletions(-)

diff --git a/lynx/src/main/java/com/github/pedrovgs/lynx/LynxView.java b/lynx/src/main/java/com/github/pedrovgs/lynx/LynxView.java
index 2b062bc..41364b6 100644
--- a/lynx/src/main/java/com/github/pedrovgs/lynx/LynxView.java
+++ b/lynx/src/main/java/com/github/pedrovgs/lynx/LynxView.java
@@ -19,6 +19,7 @@
 import android.content.Context;
 import android.content.Intent;
 import android.content.res.TypedArray;
+import android.support.annotation.CheckResult;
 import android.text.Editable;
 import android.text.TextUtils;
 import android.text.TextWatcher;
@@ -35,6 +36,8 @@
 import android.widget.RelativeLayout;
 import android.widget.Spinner;
 import android.widget.TextView;
+import android.widget.Toast;
+
 import com.github.pedrovgs.lynx.model.AndroidMainThread;
 import com.github.pedrovgs.lynx.model.Logcat;
 import com.github.pedrovgs.lynx.model.Lynx;
@@ -45,6 +48,7 @@
 import com.github.pedrovgs.lynx.renderer.TraceRendererBuilder;
 import com.pedrogomez.renderers.RendererAdapter;
 import com.pedrogomez.renderers.RendererBuilder;
+
 import java.lang.reflect.Field;
 import java.util.List;
 
@@ -181,11 +185,27 @@ public LynxConfig getLynxConfig() {
    * Uses an intent to share content and given one String with all the information related to the
    * List of traces shares this information with other applications.
    */
-  @Override public void shareTraces(String plainTraces) {
-    Intent sharingIntent = new Intent(android.content.Intent.ACTION_SEND);
-    sharingIntent.setType(SHARE_INTENT_TYPE);
-    sharingIntent.putExtra(android.content.Intent.EXTRA_TEXT, plainTraces);
-    getContext().startActivity(Intent.createChooser(sharingIntent, SHARE_INTENT_TITLE));
+  @CheckResult @Override public boolean shareTraces(String fullTraces) {
+    try {
+      shareTracesInternal(fullTraces);
+      return true;
+    } catch (RuntimeException exception1) { // Likely cause is a TransactionTooLargeException on API levels 15+.
+      try {
+        /*
+         * Limit trace size to between 100kB and 400kB, since Unicode characters can be 1-4 bytes each.
+         */
+        int fullTracesLength = fullTraces.length();
+        String truncatedTraces = fullTraces.substring(Math.max(0, fullTracesLength - 100000), fullTracesLength);
+        shareTracesInternal(truncatedTraces);
+        return true;
+      } catch (RuntimeException exception2) { // Likely cause is a TransactionTooLargeException on API levels 15+.
+        return false;
+      }
+    }
+  }
+
+  @Override public void notifyShareTracesFailed() {
+    Toast.makeText(getContext(), "Share failed", Toast.LENGTH_SHORT).show();
   }
 
   @Override public void disableAutoScroll() {
@@ -378,6 +398,13 @@ private void updateScrollPosition(int removedTraces) {
     }
   }
 
+  private void shareTracesInternal(final String plainTraces) {
+    Intent sharingIntent = new Intent(android.content.Intent.ACTION_SEND);
+    sharingIntent.setType(SHARE_INTENT_TYPE);
+    sharingIntent.putExtra(Intent.EXTRA_TEXT, plainTraces);
+    getContext().startActivity(Intent.createChooser(sharingIntent, SHARE_INTENT_TITLE));
+  }
+
   /**
    * Backdoor used to replace the presenter used in this view. This method should be used just for
    * testing purposes.
diff --git a/lynx/src/main/java/com/github/pedrovgs/lynx/presenter/LynxPresenter.java b/lynx/src/main/java/com/github/pedrovgs/lynx/presenter/LynxPresenter.java
index 0808150..ef509a3 100644
--- a/lynx/src/main/java/com/github/pedrovgs/lynx/presenter/LynxPresenter.java
+++ b/lynx/src/main/java/com/github/pedrovgs/lynx/presenter/LynxPresenter.java
@@ -16,6 +16,8 @@
 
 package com.github.pedrovgs.lynx.presenter;
 
+import android.support.annotation.CheckResult;
+
 import com.github.pedrovgs.lynx.LynxConfig;
 import com.github.pedrovgs.lynx.model.Lynx;
 import com.github.pedrovgs.lynx.model.Trace;
@@ -121,7 +123,9 @@ public void updateFilterTraceLevel(TraceLevel level) {
   public void onShareButtonClicked() {
     List<Trace> tracesToShare = new LinkedList<Trace>(traceBuffer.getTraces());
     String plainTraces = generatePlainTracesToShare(tracesToShare);
-    view.shareTraces(plainTraces);
+    if (!view.shareTraces(plainTraces)) {
+      view.notifyShareTracesFailed();
+    }
   }
 
   /**
@@ -212,7 +216,9 @@ public interface View {
 
     void clear();
 
-    void shareTraces(String plainTraces);
+    @CheckResult boolean shareTraces(String plainTraces);
+
+    void notifyShareTracesFailed();
 
     void disableAutoScroll();