Need to handle uncaught exception and send log file-Collection of common programming errors

Here’s the complete solution (almost: I omitted the UI layout and button handling) – derived from a lot of experimentation and various posts from others related to issues that came up along the way.

There are a number of things you need to do:

1. Handle uncaughtException in your Application subclass.
2. After catching an exception, start a new activity to ask the user to send a log.
3. Extract the log info from logcat’s files and write to your own file.
4. Start an email app, providing your file as an attachment.
5. Manifest: filter your activity to be recognized by your exception handler.
6. Optionally, setup Proguard to strip out Log.d() and Log.v().

Now, here are the details:

(1 & 2) Handle uncaughtException, start send log activity:

public class MyApplication extends Application
{
  public void onCreate ()
  {
    // Setup handler for uncaught exceptions.
    Thread.setDefaultUncaughtExceptionHandler (new Thread.UncaughtExceptionHandler()
    {
      @Override
      public void uncaughtException (Thread thread, Throwable e)
      {
        handleUncaughtException (thread, e);
      }
    });
  }

  public void handleUncaughtException (Thread thread, Throwable e)
  {
    e.printStackTrace(); // not all Android versions will print the stack trace automatically

    Intent intent = new Intent ();
    intent.setAction ("com.mydomain.SEND_LOG"); // see step 5.
    intent.setFlags (Intent.FLAG_ACTIVITY_NEW_TASK); // required when starting from Application
    startActivity (intent);

    System.exit(1); // kill off the crashed app
  }
}

(3) Extract log (I put this an my SendLog Activity):

private String extractLogToFile()
{
  PackageManager manager = this.getPackageManager();
  PackageInfo info = null;
  try {
    info = manager.getPackageInfo (this.getPackageName(), 0);
  } catch (NameNotFoundException e2) {
  }
  String model = Build.MODEL;
  if (!model.startsWith(Build.MANUFACTURER))
    model = Build.MANUFACTURER + " " + model;

  // Make file name - file must be saved to external storage or it wont be readable by
  // the email app.
  String path = Environment.getExternalStorageDirectory() + "/" + "MyApp/";
  String fullName = path + ;

  // Extract to file.
  File file = new File (fullName);
  InputStreamReader reader = null;
  FileWriter writer = null;
  try
  {
    // For Android 4.0 and earlier, you will get all app's log output, so filter it to
    // mostly limit it to your app's output.  In later versions, the filtering isn't needed.
    String cmd = (Build.VERSION.SDK_INT

Originally posted 2013-12-02 01:31:15.