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。

 

布局文件：showime.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns: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：