title: How to show the soft keyboard on native activity
body: <p>When I try to use <code>ANativeActivity_showSoftInput()</code>, it doesn't bring up the soft keyboard.</p>
  
  <p>I have tried using <code>ANativeActivity_showSoftInput(engine-&gt;app-&gt;activity, ANATIVEACTIVITY_SHOW_SOFT_INPUT_FORCED)</code> and <code>ANativeActivity_showSoftInput(engine-&gt;app-&gt;activity, ANATIVEACTIVITY_SHOW_SOFT_INPUT_IMPLICIT)</code> to show softinput, but also failed.</p>
  
  <p>I read the source code, and I found after start <code>nativeActivity</code>, <code>NativeContentView(extend View)</code> will be created, and when call <code>ANativeActivity_showSoftInput</code>, it will call <code>showSoftInput()</code> in java side. I think maybe the softkeyboard is not turned on. </p>
  
  <p>Can you help me?</p>