Question

我正在尝试创建一个显示列表视图的应用程序，当您单击该列表中的特定项目时，它将显示包含特定信息的Toast。

到目前为止，我从this site获得了此代码：

public class MyListActivity extends ListActivity {
public void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    String[] values = new String[] { "Android", "iPhone", "WindowsMobile",
            "Blackberry", "WebOS", "Ubuntu", "Windows7", "Max OS X",
            "Linux", "OS/2" };
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
            android.R.layout.simple_list_item_1, values);
    setListAdapter(adapter);
}

@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
    String item = (String) getListAdapter().getItem(position);
    Toast.makeText(this, item + " selected", Toast.LENGTH_LONG);
}

那么我如何修改代码，例如，当单击列表中的“android”时显示包含Android信息的吐司？当然，当点击“iPhone”等时，将显示包含不同信息的不同吐司。

感谢您提供的任何帮助：）

Answer 1

使String[] values成为一个类变量。

缺少toast.show（）。

Toast.makeText(this, values[position] + " selected", Toast.LENGTH_LONG).show();

<强>更新

public class MyListActivity extends ListActivity 
{

    private String[] values ;

    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
         values = new String[] { "Android", "iPhone", "WindowsMobile",
                "Blackberry", "WebOS", "Ubuntu", "Windows7", "Max OS X",
                "Linux", "OS/2" };
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, values);
        setListAdapter(adapter);
    }

    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {

        Toast.makeText(this, values[position]+ " selected", Toast.LENGTH_LONG);
    }

Answer 2

试试这个：

  public class MyListActivity extends ListActivity {

  private String[] _values = new String[] { "Android", "iPhone", "WindowsMobile",
        "Blackberry", "WebOS", "Ubuntu", "Windows7", "Max OS X", "Linux", "OS/2" };
  private String[] _details = new String[] { "Android Details", "iPhone Details",   
        "WindowsMobile Details", "Blackberry Details", "WebOS Details", "Ubuntu 
        Details", "Windows7 Details", "Max OS X Details", "Linux Details", "OS/2 Details" };

  public void onCreate(Bundle icicle) {
     super.onCreate(icicle);
     ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                  android.R.layout.simple_list_item_1, _values);
     setListAdapter(adapter);
  }

  @Override
  protected void onListItemClick(ListView l, View v, int position, long id) {
       Toast.makeText(this, _details[position], Toast.LENGTH_LONG).show();
  }

希望有所帮助。快乐的编码！

单击列表后显示Toast

2 个答案: