1 files changed, 85 insertions, 0 deletions
diff --git a/third_party/libwebrtc/examples/androidapp/src/org/appspot/apprtc/UnhandledExceptionHandler.java b/third_party/libwebrtc/examples/androidapp/src/org/appspot/apprtc/UnhandledExceptionHandler.java
new file mode 100644
index 0000000000..b256400119
--- /dev/null
+++ b/third_party/libwebrtc/examples/androidapp/src/org/appspot/apprtc/UnhandledExceptionHandler.java
@@ -0,0 +1,85 @@
+/*
+ *  Copyright 2013 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+package org.appspot.apprtc;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.content.DialogInterface;
+import android.util.Log;
+import android.util.TypedValue;
+import android.widget.ScrollView;
+import android.widget.TextView;
+
+import java.io.PrintWriter;
+import java.io.StringWriter;
+
+/**
+ * Singleton helper: install a default unhandled exception handler which shows
+ * an informative dialog and kills the app.  Useful for apps whose
+ * error-handling consists of throwing RuntimeExceptions.
+ * NOTE: almost always more useful to
+ * Thread.setDefaultUncaughtExceptionHandler() rather than
+ * Thread.setUncaughtExceptionHandler(), to apply to background threads as well.
+ */
+public class UnhandledExceptionHandler implements Thread.UncaughtExceptionHandler {
+  private static final String TAG = "AppRTCMobileActivity";
+  private final Activity activity;
+
+  public UnhandledExceptionHandler(final Activity activity) {
+    this.activity = activity;
+  }
+
+  @Override
+  public void uncaughtException(Thread unusedThread, final Throwable e) {
+    activity.runOnUiThread(new Runnable() {
+      @Override
+      public void run() {
+        String title = "Fatal error: " + getTopLevelCauseMessage(e);
+        String msg = getRecursiveStackTrace(e);
+        TextView errorView = new TextView(activity);
+        errorView.setText(msg);
+        errorView.setTextSize(TypedValue.COMPLEX_UNIT_SP, 8);
+        ScrollView scrollingContainer = new ScrollView(activity);
+        scrollingContainer.addView(errorView);
+        Log.e(TAG, title + "\n\n" + msg);
+        DialogInterface.OnClickListener listener = new DialogInterface.OnClickListener() {
+          @Override
+          public void onClick(DialogInterface dialog, int which) {
+            dialog.dismiss();
+            System.exit(1);
+          }
+        };
+        AlertDialog.Builder builder = new AlertDialog.Builder(activity);
+        builder.setTitle(title)
+            .setView(scrollingContainer)
+            .setPositiveButton("Exit", listener)
+            .show();
+      }
+    });
+  }
+
+  // Returns the Message attached to the original Cause of `t`.
+  private static String getTopLevelCauseMessage(Throwable t) {
+    Throwable topLevelCause = t;
+    while (topLevelCause.getCause() != null) {
+      topLevelCause = topLevelCause.getCause();
+    }
+    return topLevelCause.getMessage();
+  }
+
+  // Returns a human-readable String of the stacktrace in `t`, recursively
+  // through all Causes that led to `t`.
+  private static String getRecursiveStackTrace(Throwable t) {
+    StringWriter writer = new StringWriter();
+    t.printStackTrace(new PrintWriter(writer));
+    return writer.toString();
+  }
+}