title: How to let Android Test instrumentation testcases wait some times in order to get some result?
body: <p>anyone can help me.I want to my testcases sleep to wait the textview text change ,but it seems the Thread.sleep() can not work ! </p>
  
  <p>backgroud : I use ActivityUnitTestCase to test one of my activity . below is the testcase, from log I can not get the changed text .</p>
  
  <pre><code>public void testCanStartup() throws Exception{
      m_activty = startActivity(m_intent, null, null);
      assertNotNull(m_activty);
  
                  //get textview to check the view text's changes when oncreate and onresume
      TextView mem_percentview= (TextView) m_activty.findViewById(cn.opda.a.phonoalbumshoushou.R.id.mem_percent);
  
      Thread.sleep(50000);
      getInstrumentation().callActivityOnResume(m_activty);
      Log.v(DEBUGTAG,"mem text result is : " + mem_percentview.getText().toString());
      TextView actual_mempercentview = (TextView) m_activty.findViewById(cn.opda.a.phonoalbumshoushou.R.id.mem_percent);
      assertEquals(mem_percentview.getText().toString(),actual_mempercentview.getText().toString() );
  
  }
  </code></pre>