A Junit 4 Rule to easily access the Log Output from Robolectric.

RobolectricLoggingRule.java

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import org.junit.rules.ExternalResource;
import org.robolectric.shadows.ShadowLog;

public class RobolectricLoggingRule extends ExternalResource {

  PrintStream loggingStream;
  ByteArrayOutputStream loggingOutputStream;
  PrintStream defaultStream;

  @Override protected void before() throws Throwable {
    super.before();
    loggingOutputStream = new ByteArrayOutputStream();
    loggingStream = new PrintStream(loggingOutputStream);
    defaultStream = ShadowLog.stream;

    ShadowLog.stream = loggingStream;
  }

  @Override public String toString() {
    String result = "";
    try {
      result = loggingOutputStream.toString("UTF-8");
    } catch (Exception ex) {

    }
    return result;
  }

  @Override protected void after() {
    super.after();
    ShadowLog.stream = defaultStream;
    try {
      loggingOutputStream.close();
    } catch (Exception ex) {
      // Do nothing.
    }
  }
}