Print custom data to JUnit success result

    @Test
    public void test()
    {
        out("Current device = SM-G920F");
    }

    private void out(String str) {
        Bundle b = new Bundle();
        b.putString(Instrumentation.REPORT_KEY_STREAMRESULT, "\n" + str);
        InstrumentationRegistry.getInstrumentation().sendStatus(0, b);
    }

Add KV data to JUnit test (console run)

adb shell am instrument -w -e class com.example.developer.appname.SomeTests#testName -e key1 param1 -e key2 param2 com.example.developer.appname.test/android.support.test.runner.AndroidJUnitRunner

Spaces and some other characters is not supported in key or value
in android test use InstrumentationRegistry.getArguments().get(key)

Run anroid JUnit test with android JUnit runner from console

adb shell am instrument -w -e class com.example.developer.appname.SomeTests#testName  com.example.developer.appname.test/android.support.test.runner.AndroidJUnitRunner