Question

In Android (Java) how do I print out a full stack trace? If my application crashes from nullPointerException or something, it prints out a (almost) full stack trace like so:

java.io.IOException: Attempted read from closed stream.
com.android.music.sync.common.SoftSyncException: java.io.IOException: Attempted read from closed stream.
    at com.android.music.sync.google.MusicSyncAdapter.getChangesFromServerAsDom(MusicSyncAdapter.java:545)
    at com.android.music.sync.google.MusicSyncAdapter.fetchDataFromServer(MusicSyncAdapter.java:488)
    at com.android.music.sync.common.AbstractSyncAdapter.download(AbstractSyncAdapter.java:417)
    at com.android.music.sync.common.AbstractSyncAdapter.innerPerformSync(AbstractSyncAdapter.java:313)
    at com.android.music.sync.common.AbstractSyncAdapter.onPerformLoggedSync(AbstractSyncAdapter.java:243)
    at com.google.android.common.LoggingThreadedSyncAdapter.onPerformSync(LoggingThreadedSyncAdapter.java:33)
    at android.content.AbstractThreadedSyncAdapter$SyncThread.run(AbstractThreadedSyncAdapter.java:164)
Caused by: java.io.IOException: Attempted read from closed stream.
    at org.apache.http.impl.io.ChunkedInputStream.read(ChunkedInputStream.java:148)
    at org.apache.http.conn.EofSensorInputStream.read(EofSensorInputStream.java:159)
    at java.util.zip.GZIPInputStream.readFully(GZIPInputStream.java:212)
    at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:81)
    at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:64)
    at android.net.http.AndroidHttpClient.getUngzippedContent(AndroidHttpClient.java:218)
    at com.android.music.sync.api.MusicApiClientImpl.createAndExecuteMethod(MusicApiClientImpl.java:312)
    at com.android.music.sync.api.MusicApiClientImpl.getItems(MusicApiClientImpl.java:588)
    at com.android.music.sync.api.MusicApiClientImpl.getTracks(MusicApiClientImpl.java:638)
    at com.android.music.sync.google.MusicSyncAdapter.getChangesFromServerAsDom(MusicSyncAdapter.java:512)
    ... 6 more

However sometimes, for debugging purposes, I want to log a full stack trace from where I am in the code. I figured I could just do this:

StackTraceElement trace = new Exception().getStackTrace();
Log.d("myapp", trace.toString());

But this just prints out the pointer to the object… Do I have to iterate through all the stack trace elements to print them out? Or is there a simple method to print it all out?

Answer 1

There’s overrides of all the log methods with (String tag, String msg, Throwable tr) signatures.

Passing an exception as the third parameter should give you the full stacktrace in logcat.