Question

每当我的微调器选择一个新项目时，我想调用一个动作。当前设置是按下按钮时调用操作。

我的方法：

创建一个新功能：public void onSpinnerItemSelection(View V){...}

然后在content_home.xml我将onSpinnerItemSelection添加到onClick Spinner。

这不起作用。我不熟悉Android错误，而且我很难解释这些错误。

Unfortunately, myApp has stopped

Caused by: java.lang.RuntimeException: Don't call setOnClickListener for an AdapterView. You probably want setOnItemClickListener instead

Answer 1

一步一步：

1ªDeclare变量来自布局Spinner sp;这个案例中的arraylist ArrayList listTeams;和适配器Adapter adapter;

2ªinstances

private void instances() {

    sp = (Spinner) findViewById(R.id.spinner);
    listaTeam = new ArrayList();

3º为适配器添加项目

private void listAdapter() {

    listaTeam.add(new Equipo(R.string.Atleti));
    adaptador = new Adaptador(MainActivity.this, listaEquipo);
    sp.setAdapter(adapter);

现在我们采取行动，使用onItemSelected。

public void onItemSelected（AdapterView parent，View view，int position，long id）{

    Toast.makeText("this is my team", Toast.LENGTH_LONG).show();
}

https://www.youtube.com/watch?v=H3W0-Nv664I

Answer 2

以下是一个例子：

mSpinner.setOnItemSelectedListener(new OnItemSelectedListener() 
{
    @Override
    public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) 
    {
        Toast.makeText("log", "position = " position, Toast.LENGTH_LONG).show();
    }

    @Override
    public void onNothingSelected(AdapterView<?> parentView) 
    {
        Toast.makeText("log", "onNothingSelected", Toast.LENGTH_LONG).show();
    }
});

Spinner onClick监听器

2 个答案: