Question

如果我在我的微调器中单击一个Item，我想在WebView中加载一个URL。我尝试在字符串中写入微调器中所选项目的值，然后使用我用旋转器选择的新网站重新加载WebView中的URL。但它没有加载新的URL，我希望你们能帮助我:)。

array.xml：

<string-array name="server_array">
    <item value="http://www.msn.com">Server 1</item>
    <item value="http://www.stackoverflow.com">Server 2</item>
</string-array>

的字符串：

String starturl = "http://www.google.de", selected;
WebView myWebView;

的onCreate：

  protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


    //WebView
    myWebView = (WebView) findViewById(R.id.webView);
    myWebView.setWebViewClient(new WebC());
    WebSettings webSettings = myWebView.getSettings();

    //JavaScript erlauben
    webSettings.setJavaScriptEnabled(true);

    //Start Url
    myWebView.loadUrl(starturl);

微调：

//Spinner
        Spinner spinner = (Spinner) findViewById(R.id.server_spinner);
        ArrayAdapter<CharSequence>
                adapter = ArrayAdapter.createFromResource(this,
                R.array.server_array, android.R.layout.simple_spinner_item);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(adapter);
    }

onItemSelected：

public class SpinnerActivity extends AppCompatActivity implements AdapterView.OnItemSelectedListener {

            public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {

                selected = parent.getItemAtPosition(pos).toString();

                myWebView.loadUrl(selected);
            }

            public void onNothingSelected(AdapterView<?> parent) {

                myWebView.loadUrl(starturl);
            }
        }

Answer 1

你没有在任何地方打电话给setOnItemSelectedListener。假设Spinner和WebView位于同一SpinnerActivity，您必须调用

 Spinner spinner = (Spinner) findViewById(R.id.server_spinner);
 ArrayAdapter<CharSequence>
                adapter = ArrayAdapter.createFromResource(this,
                R.array.server_array, android.R.layout.simple_spinner_item);
 adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
 spinner.setAdapter(adapter);
 spinner.setOnItemSelectedListener(this);

this指的是SpinnerActivity，implements AdapterView.OnItemSelectedListener {

Spinner：打开新的Url“onItemSelected”并写入“string”

1 个答案: