工作中有一个界面刚进入时要弹出一个popupwindow，里面有键盘，结果直接模拟点击事件不起作用，还报错，
12-26 17:01:08.636: D/CrashHandler(1795): android.view.WindowManager$BadTokenException: Unable to add window -- token null is not valid; is your activity running?
12-26 17:01:08.636: D/CrashHandler(1795):at android.view.ViewRoot.setView(ViewRoot.java:505)
12-26 17:01:08.636: D/CrashHandler(1795):at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:177)
12-26 17:01:08.636: D/CrashHandler(1795):at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
12-26 17:01:08.636: D/CrashHandler(1795):at android.view.Window$LocalWindowManager.addView(Window.java:424)
12-26 17:01:08.636: D/CrashHandler(1795):at android.widget.Popupwindows.invokePopup(PopupWindow.java:828)
12-26 17:01:08.636: D/CrashHandler(1795):at android.widget.PopupWindow.showAtLocation(PopupWindow.java:688)
12-26 17:01:08.636: D/CrashHandler(1795):at com.jiuqi.muchmore.clothing.view.keyboard.OnClickListenerForKeyboard.onClick(OnClickListenerForKeyboard.java:258)
12-26 17:01:08.636: D/CrashHandler(1795):at android.view.View.performClick(View.java:2408)
把它加到异步任务中，等待一会（500毫秒）就正常了，百思不得其解。
弹出方法最后考达内的一篇文章做了下试验，解决了。
/gpx/11/6042.html
布局文件：showime.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:focusable="true"
android:focusableInTouchMode="true"
android:orientation="vertical" >
<Button
android:id="@+id/ButtonIME"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="5px"
android:text="弹出软键盘输入法" />
<EditText
android:id="@+id/EditTextIME"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="5px"
android:text="显示输入法键盘22" />
</LinearLayout>
java源码：ShowIME.java
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.os.SystemClock;
import android.view.MotionEvent;
import android.view.View;
import android.view.Window;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
public class ShowIME extends Activity{
private EditText et;
private Button bt;
private static Handler messageHandler;
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.showime);
bt = (Button)findViewById(R.id.ButtonIME);
bt.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v){
et.dispatchTouchEvent(MotionEvent.obtain(SystemClock.uptimeMillis(), SystemClock.uptimeMillis(), MotionEvent.ACTION_DOWN,
et.getLeft() + 5, et.getTop() + 5, 0));
et.dispatchTouchEvent(MotionEvent.obtain(SystemClock.uptimeMillis(), SystemClock.uptimeMillis(), MotionEvent.ACTION_UP,
et.getLeft() + 5, et.getTop() + 5, 0));
}
});
et = (EditText)findViewById(R.id.EditTextIME);
PopupKeyboardAsync t = new PopupKeyboardAsync();
t.execute();
//et.dispatchTouchEvent(MotionEvent.obtain(SystemClock.uptimeMillis(), SystemClock.uptimeMillis(), MotionEvent.ACTION_DOWN, et.getLeft()+5, et.getTop()+5, 0));
//et.dispatchTouchEvent(MotionEvent.obtain(SystemClock.uptimeMillis(), SystemClock.uptimeMillis(), MotionEvent.ACTION_UP, et.getLeft()+5, et.getTop()+5, 0));
//Looper looper = Looper.myLooper();
//messageHandler = new MessageHandler(looper);
////此处的作用是延迟1秒，然后激活点击事件
//new Thread(){
//@Override
//public void run(){
//synchronized(this){
//try{
//wait(1000); //1秒
//}
//catch(InterruptedException e){
//e.printStackTrace();
//}
//}
//Message message = Message.obtain();
//message.what = 1;
//messageHandler.sendMessage(message);
//}
//}.start();
}
class PopupKeyboardAsync extends AsyncTask {
@Override
protected Void doInBackground(Void... params){
synchronized(this){
try{
wait(500); //0.5秒
}
catch(InterruptedException e){
e.printStackTrace();
}
}
return null;
}
@Override
protected void onPostExecute(Void result){
et.dispatchTouchEvent(MotionEvent.obtain(SystemClock.uptimeMillis(), SystemClock.uptimeMillis(), MotionEvent.ACTION_DOWN, et.getLeft()+5, et.getTop()+5, 0));
et.dispatchTouchEvent(MotionEvent.obtain(SystemClock.uptimeMillis(), SystemClock.uptimeMillis(), MotionEvent.ACTION_UP, et.getLeft()+5, et.getTop()+5, 0));
}
}
class MessageHandler extends Handler{
public MessageHandler(Looper looper){
super(looper);
}
@Override
public void handleMessage(Message msg){
Bundle bundle = msg.getData();
switch(msg.what){
case 1:
//模拟点击按钮
//bt.dispatchTouchEvent(MotionEvent.obtain(SystemClock.uptimeMillis(), SystemClock.uptimeMillis(), MotionEvent.ACTION_DOWN,
//et.getLeft() + 5, et.getTop() + 5, 0));
//bt.dispatchTouchEvent(MotionEvent.obtain(SystemClock.uptimeMillis(), SystemClock.uptimeMillis(), MotionEvent.ACTION_UP,
//et.getLeft() + 5, et.getTop() + 5, 0));
//以下代码模拟点击文本编辑框
et.dispatchTouchEvent(MotionEvent.obtain(SystemClock.uptimeMillis(), SystemClock.uptimeMillis(), MotionEvent.ACTION_DOWN, et.getLeft()+5, et.getTop()+5, 0));
et.dispatchTouchEvent(MotionEvent.obtain(SystemClock.uptimeMillis(), SystemClock.uptimeMillis(), MotionEvent.ACTION_UP, et.getLeft()+5, et.getTop()+5, 0));
break;
default:
break;
}
}
}
}
其他参考：
/s?wd=android 模拟 MotionEvent&pn=10&ie=utf-8&rsv_page=1
http://hhj35713./blog/static/210709244722104950715/
/p-418125317.html
/cdz/archive//11/25/364835.html
/q/5875
/banxi/blog/56421
/blog/1333334
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