listviewitem上未显示警报框单击android

listviewitem上未显示警报框单击android,android,textview,Android,Textview,我想在alertbox中设置文本视图文本。我想做倒计时。我的代码如下: 我的自定义警报框 public abstract class ChallengeDialog extends AlertDialog.Builder implements OnClickListener { TextView msg; /** * @param context * @param title resource id * @param message resource id */

我想在alertbox中设置文本视图文本。我想做倒计时。我的代码如下: 我的自定义警报框

public abstract class ChallengeDialog extends AlertDialog.Builder implements OnClickListener {

    TextView msg;

 /**
  * @param context
  * @param title resource id
  * @param message resource id
  */
 public ChallengeDialog(Context context, String title, String message) {
  super(context);
  setTitle(title);
//  setMessage(message);
  msg = new TextView(context);
  msg.setText(message);
  setView(msg);

  setPositiveButton("accept", this); //In android this is OK button
  setNegativeButton("reject", this);//In android this is cancel button
 }

public void setDialogMsg(String m){
     msg.setText(m);
     setView(msg);
 }

 /**
  * will be called when "cancel" pressed.
  * closes the dialog.
  * can be overridden.
  * @param dialog
  */
 //This is cancel button
 public void onOkClicked(DialogInterface dialog) {
  dialog.dismiss();
 }

 @Override
 public void onClick(DialogInterface dialog, int which) {

  if (which == DialogInterface.BUTTON_POSITIVE) { 

    dialog.dismiss();

  } else {

      onOkClicked(dialog);

  }

 }

 /**
  * called when "ok" pressed.
  * @param input
  * @return true, if the dialog should be closed. false, if not.
  */
 //This is challenge button 
 abstract public boolean onCancelClicked(String input); 

}
使用自定义警报框的代码

ChallengeDialog chlngDialog = new ChallengeDialog(MyActivity.this,"title","count") {

                            @Override
                            public boolean onCancelClicked(String input) {
                                // TODO Auto-generated method stub
                                return false;
                            }

                        };

                        AlertDialog a = chlngDialog.show();


                        for(int i = 15 ; i>0 ;i--){

                            try {
                                chlngDialog.setDialogMsg("count "+i);
                                Thread.sleep(1000);

                            } catch (InterruptedException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                            }
                        }
//a.dismiss();

我正在单击listview执行此代码。但警报框在15秒后显示,我点击了listview项。我不知道为什么会这样

您是否将for循环放入了
onItemClick
listener


如果是,则创建一个异步任务并在
onItemClick
listener中执行该任务。将for循环放入
doInBackground

您是否将for循环放入
onItemClick
侦听器


如果是,则创建一个异步任务并在
onItemClick
listener中执行该任务。将for循环放入
doInBackground

正如Android Coader建议的那样,我已经完成了异步任务。代码如下:

public abstract class MyDialog extends AlertDialog.Builder implements OnClickListener {

    TextView msgTxt;
    private static int count= 15 ;
    private String user;
    private int c;

 /**
  * @param context
  * @param title resource id
  * @param message resource id
  */
 public ChallengeDialog(Context context, String title, String message) {
  super(context);
  setTitle(title);
  setCancelable(false);
//  setMessage(message);
  msgTxt = new TextView(context);
  msgTxt.setText(message);
  setView(msgTxt);

  setPositiveButton("accept", this); //In android this is OK button
  setNegativeButton("reject", this);//In android this is cancel button

  MyTimerTask myTask = new MyTimerTask();
  myTask.execute(new String[] { "abc" });

 }

public void setUserAndBet(String u,int b){
        c= b;
        user = u ;
 }

 /**
  * will be called when "cancel" pressed.
  * closes the dialog.
  * can be overridden.
  * @param dialog
  */

 @Override
 public void onClick(DialogInterface dialog, int which) {

  if (which == DialogInterface.BUTTON_POSITIVE) { 

      onAcceptClicked(dialog);
//    dialog.dismiss();

  } else {

      onRejectClicked(dialog);

  }

 }

 /**
  * called when "ok" pressed.
  * @param input
  * @return true, if the dialog should be closed. false, if not.
  */
 //This is accept button 
 abstract public boolean onAcceptClicked(DialogInterface d);
 abstract public boolean onRejectClicked(DialogInterface d);

    Handler mHandler = new Handler() {
     @Override
     public void handleMessage(Message msg) {

        int countDownValue = (Integer)msg.obj;

        msgTxt.setText(countDownValue +" seconds");

        //call setText here
     }
    };


 class MyTimerTask extends AsyncTask<String, Void, String>{

        @Override
        protected String doInBackground(String... urls) {
          //mHandler.sendEmptyMessage(0);

          while(count > 0 ){

              Message msg = new Message();
              int countDownValue = count--;
              msg.obj = countDownValue;
              mHandler.sendMessage(msg);
              try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

          }

          return " ";


      }
 } 
}
公共抽象类MyDialog扩展了AlertDialog.Builder实现了OnClickListener{
文本视图msgTxt;
私有静态整数计数=15;
私有字符串用户;
私人INTC;
/**
*@param上下文
*@param title资源id
*@param消息资源id
*/
公共ChallengeDialog(上下文、字符串标题、字符串消息){
超级(上下文);
片名(片名);
可设置可取消(假);
//设置消息(消息);
msgTxt=新文本视图(上下文);
msgTxt.setText(消息);
setView(msgTxt);
setPositiveButton(“接受”,this);//在android中,这是OK按钮
setNegativeButton(“拒绝”,this);//在android中,这是取消按钮
MyTimerTask myTask=新建MyTimerTask();
execute(新字符串[]{“abc”});
}
公共void setUserAndBet(字符串u,int b){
c=b;
用户=u;
}
/**
*将在按下“取消”时调用。
*关闭对话框。
*可以重写。
*@param对话框
*/
@凌驾
public void onClick(DialogInterface dialog,int which){
如果(which==DialogInterface.BUTTON_正数){
onAcceptClicked(对话框);
//dialog.dismise();
}否则{
点击(对话框);
}
}
/**
*按下“ok”时调用。
*@param输入
*@return true,如果对话框应该关闭,则返回true。否则返回false。
*/
//这是“接受”按钮
抽象公共布尔值onAcceptClicked(Dialogd接口);
抽象公共布尔值(DialogD接口);
Handler mHandler=新处理程序(){
@凌驾
公共无效handleMessage(消息消息消息){
int countDownValue=(整数)msg.obj;
msgTxt.setText(倒计时值+秒);
//在这里呼叫setText
}
};
类MyTimerTask扩展了异步任务{
@凌驾
受保护的字符串doInBackground(字符串…URL){
//mHandler.sendEmptyMessage(0);
而(计数>0){
Message msg=新消息();
int countDownValue=计数--;
msg.obj=倒计时值;
mHandler.sendMessage(msg);
试一试{
睡眠(1000);
}捕捉(中断异常e){
//TODO自动生成的捕捉块
e、 printStackTrace();
}
}
返回“”;
}
} 
}

只需创建此调用的对象并调用show()方法。感谢Adndroid Coader

我完成了Android Coader建议的异步任务。代码如下:

public abstract class MyDialog extends AlertDialog.Builder implements OnClickListener {

    TextView msgTxt;
    private static int count= 15 ;
    private String user;
    private int c;

 /**
  * @param context
  * @param title resource id
  * @param message resource id
  */
 public ChallengeDialog(Context context, String title, String message) {
  super(context);
  setTitle(title);
  setCancelable(false);
//  setMessage(message);
  msgTxt = new TextView(context);
  msgTxt.setText(message);
  setView(msgTxt);

  setPositiveButton("accept", this); //In android this is OK button
  setNegativeButton("reject", this);//In android this is cancel button

  MyTimerTask myTask = new MyTimerTask();
  myTask.execute(new String[] { "abc" });

 }

public void setUserAndBet(String u,int b){
        c= b;
        user = u ;
 }

 /**
  * will be called when "cancel" pressed.
  * closes the dialog.
  * can be overridden.
  * @param dialog
  */

 @Override
 public void onClick(DialogInterface dialog, int which) {

  if (which == DialogInterface.BUTTON_POSITIVE) { 

      onAcceptClicked(dialog);
//    dialog.dismiss();

  } else {

      onRejectClicked(dialog);

  }

 }

 /**
  * called when "ok" pressed.
  * @param input
  * @return true, if the dialog should be closed. false, if not.
  */
 //This is accept button 
 abstract public boolean onAcceptClicked(DialogInterface d);
 abstract public boolean onRejectClicked(DialogInterface d);

    Handler mHandler = new Handler() {
     @Override
     public void handleMessage(Message msg) {

        int countDownValue = (Integer)msg.obj;

        msgTxt.setText(countDownValue +" seconds");

        //call setText here
     }
    };


 class MyTimerTask extends AsyncTask<String, Void, String>{

        @Override
        protected String doInBackground(String... urls) {
          //mHandler.sendEmptyMessage(0);

          while(count > 0 ){

              Message msg = new Message();
              int countDownValue = count--;
              msg.obj = countDownValue;
              mHandler.sendMessage(msg);
              try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

          }

          return " ";


      }
 } 
}
公共抽象类MyDialog扩展了AlertDialog.Builder实现了OnClickListener{
文本视图msgTxt;
私有静态整数计数=15;
私有字符串用户;
私人INTC;
/**
*@param上下文
*@param title资源id
*@param消息资源id
*/
公共ChallengeDialog(上下文、字符串标题、字符串消息){
超级(上下文);
片名(片名);
可设置可取消(假);
//设置消息(消息);
msgTxt=新文本视图(上下文);
msgTxt.setText(消息);
setView(msgTxt);
setPositiveButton(“接受”,this);//在android中,这是OK按钮
setNegativeButton(“拒绝”,this);//在android中,这是取消按钮
MyTimerTask myTask=新建MyTimerTask();
execute(新字符串[]{“abc”});
}
公共void setUserAndBet(字符串u,int b){
c=b;
用户=u;
}
/**
*将在按下“取消”时调用。
*关闭对话框。
*可以重写。
*@param对话框
*/
@凌驾
public void onClick(DialogInterface dialog,int which){
如果(which==DialogInterface.BUTTON_正数){
onAcceptClicked(对话框);
//dialog.dismise();
}否则{
点击(对话框);
}
}
/**
*按下“ok”时调用。
*@param输入
*@return true,如果对话框应该关闭,则返回true。否则返回false。
*/
//这是“接受”按钮
抽象公共布尔值onAcceptClicked(Dialogd接口);
抽象公共布尔值(DialogD接口);
Handler mHandler=新处理程序(){
@凌驾
公共无效handleMessage(消息消息消息){
int countDownValue=(整数)msg.obj;
msgTxt.setText(倒计时值+秒);
//在这里呼叫setText
}
};
类MyTimerTask扩展了异步任务{
@凌驾
受保护的字符串doInBackground(字符串…URL){
//mHandler.sendEmptyMessage(0);
而(计数>0){
Message msg=新消息();
int countDownValue=计数--;
msg.obj=倒计时值;
mHandler.sendMessage(msg);
试一试{
睡眠(1000);
}捕捉(中断异常e){
//TODO自动生成的捕捉块
e、 printStackTrace();
}
}
返回“”;
}
} 
}
只需创建此调用的对象并调用show()方法。谢谢Adndroid Coader