Question

我想在用户执行Listview的onItemLongClick时显示一个对话框，以确认用户是否想要这样做但是在adb.show()的行中给出了这个错误：

指定的孩子已经有父母。您必须首先在孩子的父母上调用removeView（）

使用以下代码：

listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
        @Override
        public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {

            AlertDialog.Builder adb = new AlertDialog.Builder(getBaseContext());
            adb.setView(view);
            adb.setTitle("Title of alert dialog");
            adb.setIcon(android.R.drawable.ic_dialog_alert);
            adb.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {

                    Toast.makeText(Menu.this, "OK", Toast.LENGTH_LONG).show();
                } });

            adb.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {
                    Toast.makeText(Menu.this, "cancel", Toast.LENGTH_LONG).show();
                    //finish();
                } });
            adb.show();

            return true;
        }
    });

我搜索了答案，但我看到了listview或longclick，所以我需要帮助:(

添加了 logcat，它出错的行显示在adb.show();：

java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
at android.view.ViewGroup.addViewInner(ViewGroup.java:3936)
at android.view.ViewGroup.addView(ViewGroup.java:3786)
at android.view.ViewGroup.addView(ViewGroup.java:3758)
at com.android.internal.app.AlertController.setupView(AlertController.java:492)
at com.android.internal.app.AlertController.installContent(AlertController.java:236)
at android.app.AlertDialog.onCreate(AlertDialog.java:356)
at android.app.Dialog.dispatchOnCreate(Dialog.java:373)
at android.app.Dialog.show(Dialog.java:274)
at android.app.AlertDialog$Builder.show(AlertDialog.java:993)
at pt.isec.jogodememoria.MenuEscolheNivel$2.onItemLongClick(MenuEscolheNivel.java:119)
at android.widget.AbsListView.performLongPress(AbsListView.java:3121)
at android.widget.AbsListView$CheckForLongPress.run(AbsListView.java:3070)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

Answer 1

一个非常简单的错误，这是listView.setOnItemLongClickListener(new AdapterView .OnItemLongClickListener() { @Override public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) { createDialog(view); return true; } });，并且不需要setView。您仍然可以创建一个单独的方法，并为每个长项目单击实例化它。

public void createDialog(View view){

   AlertDialog.Builder adb = new AlertDialog.Builder(this);
    //adb.setView(Main.this);
    adb.setTitle("Title of alert dialog");
    adb.setIcon(android.R.drawable.ic_dialog_alert);
    adb.setPositiveButton("OK", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {

            Toast.makeText(getApplicationContext(), "OK", Toast.LENGTH_LONG).show();
        } });

    adb.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            Toast.makeText(getApplicationContext(), "cancel", Toast.LENGTH_LONG).show();
            //finish();
        } });

    AlertDialog alertDialog = adb.create();
    alertDialog.show();

}

然后为对话框创建一个单独的方法：

res_count[key]+=each.instance_count

# change to since who knows what is in each.instance_count

res_count[key]+=1
#bottom line, keep the 2 count added the same way, we have no way knowing which to use

Answer 2

我认为该行

adb.setView(view);

错了。

因为您正在尝试将项目视图（视图）作为主视图为您进行对话。如果您对这些行进行注释，则代码应该可以正常工作。

你应该改变这一行

adb.show();

由此

AlertDialog dialog = adb.create();
dialog.show();

并通过YourActivity.this或getActivity（）更改您的上下文（getBaseContext（））。

问候。

Answer 3

首先尝试

  listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
            @Override
            public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {

                showDialog(view);

           return true;
            }
        });


        private void showDialog(View view) {

            AlertDialog.Builder adb = new AlertDialog.Builder(this);
                adb.setView(view);//try it first with this line if it doesnt work delete it 
                adb.setTitle("Title of alert dialog");
                adb.setIcon(android.R.drawable.ic_dialog_alert);
                adb.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {

                        Toast.makeText(Menu.this, "OK", Toast.LENGTH_LONG).show();
                    } });

                adb.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(Menu.this, "cancel", Toast.LENGTH_LONG).show();
                        //finish();
                    } });

                adb.create().show();
        }

如果它没有工作，那么创建一个自定义布局，其中只包含对话框的主体，然后尝试这个：

listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
                @Override
                public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {

                    showDialog(view);

               return true;
                }
            });

  private void showDialog() {
        // TODO Auto-generated method stub
        LayoutInflater inflater = this.getLayoutInflater();

        final View customview = inflater.inflate(
                R.layout.your_dialog_layout, null);

        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setView(customview);
        builder.setPositiveButton("Add", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {

        });
        builder.setNegativeButton("Cancel",
                new DialogInterface.OnClickListener() {

                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        // TODO Auto-generated method stub

                    }
                });
        Dialog dialog = builder.create();
        dialog.show();
    }

我希望这会对你有所帮助:)。

Answer 4

是因为您正在尝试使用包含父级的视图，因为您看不到。最好的方法是使用相同的布局来扩充另一个视图。

尝试使用另一种布局，使用相同的东西：

然后：

final AlertDialog.Builder adb = new AlertDialog.Builder(getBaseContext());
View newView = View.inflate(getBaseContext(),R.layout.my_layout,null);
adb.setView(newView);
adb.setTitle("Title of alert dialog");
adb.setIcon(android.R.drawable.ic_dialog_alert);
adb.setPositiveButton("OK", new DialogInterface.OnClickListener() {
  public void onClick(DialogInterface dialog, int which) {
    Toast.makeText(Menu.this, "OK", Toast.LENGTH_LONG).show();
  }
});

adb.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
  public void onClick(DialogInterface dialog, int which) {
    Toast.makeText(Menu.this, "cancel", Toast.LENGTH_LONG).show();
    //finish();
  }
});

listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
  @Override
  public boolean onItemLongClick(AdapterView < ? > parent, View view, int position, long id) {

    adb.show();
    return true;
  }
});

在onItemLongClick中显示AlertDialog是否给出了关于父母的错误我必须做什么？

4 个答案:

首先尝试