Question

我有一段代码用于从GridD中选择一个AlertDialog中的数字：

public void iconSelect (View v){

    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    GridView gridview = new GridView(this);

    List<Integer>  mList = new ArrayList<Integer>();
    for (int i = 1; i < 10; i++) {
        mList.add(i);
    }
    ArrayAdapter<Integer> adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, mList);
    gridview.setAdapter(adapter);
    gridview.setNumColumns(3);
    gridview.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            Toast.makeText(getApplicationContext(), "Chosen: " + position, Toast.LENGTH_SHORT).show();

        }
    });

    builder.setView(gridview);
    builder.setTitle("Icon selector");
    builder.show();
}

我的目标是当用户从gridview中选择一个数字时，对话框将关闭。现在，它允许用户点击gridview上的数字并按照用户的需要多次显示吐司，直到他按下后退按钮。

我该怎么办？我正在寻找一个类似于builder.close（）或builder.dismiss（）的方法来在侦听器中执行。（使构建器成为最终变量）

Answer 1

您应该使用builder.show()或builder.create()来保存AlertDialog的实例，以便在此之后将其解除

请尝试以下代码：

public void iconSelect (View v){

    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    GridView gridview = new GridView(this);

    List<Integer>  mList = new ArrayList<Integer>();
    for (int i = 1; i < 10; i++) {
        mList.add(i);
    }
    ArrayAdapter<Integer> adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, mList);
    gridview.setAdapter(adapter);
    gridview.setNumColumns(3);

    builder.setView(gridview);
    builder.setTitle("Icon selector");
    final AlertDialog dialog = builder.show();
    gridview.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            Toast.makeText(getApplicationContext(), "Chosen: " + position, Toast.LENGTH_SHORT).show();
            dialog.dismiss();
        }
    });
}

用户选择选项时关闭AlertDialog

1 个答案: