在onItemLongClick中显示AlertDialog会给出一个关于父级的错误,我该怎么做?

一个很容易的错误,这个丢失了 AlertDialog alertDialog = adb.create(); 并且不需要setView。您仍然可以创建一个单独的方法,并为每次长项目单击实例化它。

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

        createDialog(view);
        return true;
    }
});

然后为对话框创建一个单独的方法:

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();

}

我认为这条线

adb.setView(view);

是错误的。

因为您正在尝试将项目视图(视图)设置为您的主视图Dialog。 如果对这些行进行注释,则代码应该是有效的。

你应该换这条线

adb.show();

通过这个

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

然后通过YourActivity更改上下文(getBaseContext())。this或getActivity()。

当做

先试试这个

  listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
            @Override
            public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
                
                showDialog(view);
    
           return true;
            }
        });
    
    
        private void showDialog(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();
        }

如果没有成功,请创建一个自定义布局,其中只包含对话框的主体,然后尝试以下操作:

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();
    }

我希望这能帮助你:)

这是因为您正在尝试使用一个具有父级的视图,正如您所看到的那样。最好的方法是使用所需的相同布局放大另一个视图。

尝试使用其他布局,使用相同的内容:

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;
  }
});