Question

我有一个AlertDialog，由于一些奇怪的原因无法访问最终的int deptID。将值传递给ConfirmRemoval - 函数时，值是正确的，但是当我进入对话框的onClick事件时，最终的int是未定义的！

我甚至试图将其更改为全局变量，但仍然没有运气。有谁知道发生了什么事？

@Override
public void onCreate(Bundle icicle){
    super.onCreate(icicle);

    this.setContentView(R.layout.generic_list);
    Bundle extras = getIntent().getExtras();
    if (extras == null) {return;}
    this.getListView().setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {

        public boolean onItemLongClick(AdapterView<?> adv, View v,
                int pos, long id) {
            Cursor cursor = (Cursor)adv.getItemAtPosition(pos);
            int deptID = cursor.getInt(cursor.getColumnIndex("DeptID"));
            ConfirmRemoval(deptID);
            return true; //NOTE! If returning false, the itemClick event will fire
        }
    });
}

private void ConfirmRemoval(final int deptID){
        AlertDialog.Builder bld = new AlertDialog.Builder(this);
        bld.setCancelable(false);
        bld.setTitle(R.string.deptRemove);
        bld.setMessage(R.string.deptRemoveMsg);
        bld.setPositiveButton("OK", new AlertDialog.OnClickListener() {

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

                Dept.RemoveDept(deptID);
                dialog.dismiss();
                GetDepartments();
            }


        });
        bld.setNegativeButton("Cancel", new AlertDialog.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.cancel();
            }
        });
        AlertDialog alert = bld.create();
        alert.show();
}

谢谢， Runey

Answer 1

好的，你必须编写自己的OnClickListener - 类似于：

public static class processAlert implements DialogInterface.OnClickListener {
    int deptID;
    processAlert(int _id){
        deptID = _id;
    }
    public void onClick(DialogInterface dialog, int which) {
         Dept.RemoveDept(deptID);
            dialog.dismiss();
            GetDepartments();   
    }
}

并在您创建对话框时

bld.setPositiveButton("OK",new processAlert(deptID))

Answer 2

试

 final int deptID = cursor.getInt(cursor.getColumnIndex("DeptID"));

Answer 3

而不是

Dept.RemoveDept(deptID)做

int deptIDlocal = deptID; Dept.RemoveDept(deptIDlocal)

Android Dialog无法“看到”最终/全局变量

3 个答案: