如何设置webview客户端？

Question

我在android文档中看到你使用的地方

 private class HelloWebViewClient extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {

处理在Webview中单击项目的时间.

唯一的问题是我,是我在另一种方法中设置网址.

HelloWebViewClient会覆盖它,并且不会使用用户可以选择的URL.它只返回null ..我怎么能过度使用这个方法来使用用户设置的url？

当我与一个普通的方法使用它的URL被加载WebView browser;,然后browser.loadUrl(String url)

@Override
public void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);
    setContentView(R.layout.shopping);

    findIT = (Button)findViewById(R.id.findIT);
    edittext = (EditText)findViewById(R.id.item);
    type = (RadioGroup)findViewById(R.id.console);
    site = (RadioGroup)findViewById(R.id.shopping_group);

    findIT.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            item = edittext.getText().toString();
                lookUp();
        }
    });

}

public void lookUp(){

    browser = (WebView) findViewById(R.id.shoppingBrowser);
    browser.getSettings().setJavaScriptEnabled(true);
    Log.v(item, item);
    getUserPreference();
    browser.setWebViewClient(new HelloWebViewClient());
    browser.loadUrl(url);


}



  private class HelloWebViewClient extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String notuse) {
        Log.v("shopping", url+" loaded");



       return true;
    }


  }
public void getUserPreference(){

    switch(type.getCheckedRadioButtonId()){
    case R.id.item:
        console = "item";
        break;
    case R.id.PS3:
        console = "item";
        break;
    case R.id.item:
        console = "item"; 
        break;

    }Log.v("item", console);
     switch(site.getCheckedRadioButtonId()){

         case R.id.store:
             url = "http://www.gamestop.com/browse?nav=16k- "+ item +"  " + console;
             break;
         case R.id.store:
             url = "http://www.google.com/search?q="+item + "   " + console+"&tbm=shop&hl=en&aq=0&oq=where+";
             break;
         case R.id.store:
             url = "http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Dvideogames&field-keywords="+item + "  "+ console+"&x=0&y=0"; 
             Log.v("shopping", url);
          }
       }
  }

如果您看到我尝试做什么,用户可以选择他们想要购买的网站.从那里我把它设置为网址.

Answer 1

如果用户从同一活动中选择URL,您只需引用成员变量中的URL而不是参数中的URL:

// Member variable stored to reflect user's choice
private String mUserUrl = "http://stackoverflow.com";

private class HelloWebViewClient extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        // This line right here is what you're missing.
        // Use the url provided in the method.  It will match the member URL!
        view.loadUrl(url);
        return true;
    }
}

这告诉你超载的URL加载(事实上导致它加载您想要的,而不是提供的网址URL)的WebviewClient.

这是我嘲笑的一个完整的例子:

public class HelloWebViewActivity extends Activity {
    private WebView mWebView = null;
    private EditText mInputUrl = null;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    mInputUrl = (EditText)findViewById(R.id.input_url);
    Button button = (Button)findViewById(R.id.button);
    button.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
              String url = mInputUrl.getText().toString();
              mWebView.loadUrl(url);
            }
        });

    mWebView = (WebView) findViewById(R.id.webview);
    mWebView.getSettings().setJavaScriptEnabled(true);
    mWebView.setWebViewClient(new HelloWebViewClient());
}

private class HelloWebViewClient extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
    view.loadUrl(url);
    return true;
    }
}
}

希望这可以帮助.如果这适合您,请将答案标记为已接受.

Answer 2

It isn't clear from your question whether this is the case, but it is possible that you did not set the WebViewClient of your WebView to the custom subclass that you created in your code. Somewhere in your code you should have something like:

browser.setWebViewClient(new HelloWebViewClient());

If you are only doing this with this one instance of WebView and your modifications to the WebViewClient are simple, then I would suggest that a more elegant way to accomplish this would be the following:

browser.setWebViewClient(new WebViewClient() {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        // Insert your code here
    }
});

Edit:

Is it possible that the WebViewClient is actually a red herring? It appears to me that there is a problem with your switch statements in getUserPreference(). While the first switch statement seems unnecessary, the second one only ever sets the url to gamestop because all of your cases are the same.