1

我为 Android 编写了一个应用程序，它使用 webview 通过复选框将信息提交到 MYSQl 后端。现在要退出 web 视图，用户必须使用设备上的按键才能继续下一个应用程序活动。是否有某种方法可以检测应用程序已按下表单提交按钮，然后使用某些东西，比如 Intent 去下一个活动（关闭 webview，然后关闭 NextActivity.class），最好不使用 javascript？我尝试了 shouldOverrideUrlLoading，方法是在按下提交按钮时调用一个新页面，然后使用 (Uri.parse(url).getHost().equals("page url")){Intent... } 没有运气。提前致谢！这是编码页面：

public class WebViewActivity extends Activity { 
private WebView webView;
int backButtonCount = 0;

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.webview);
    //webView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY); 
    Bundle extras = getIntent().getExtras();
        if(extras!=null){
            String rode=extras.getString("rode");
             }
        String ray = extras.getString("rode");

    webView = (WebView) findViewById(R.id.webView1);
    webView.getSettings().setJavaScriptEnabled(true);
    webView.loadUrl("http://mywebsite.com/SubDir/user_man.php?user=" + ray);

}


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

        if (Uri.parse(url).equals("http://mywebsite.com/SubDir/process_prof.php")) {
             return false;
        }

        Intent ik = new Intent(WebViewActivity.this, master_menu.class);
        startActivity(ik);
        finish();
            return true;
    }
}   

 @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.action_bar_two, menu);
        return true;
    }

    @Override
    public boolean    onOptionsItemSelected(MenuItem item) {
    if  (item.getItemId()==R.id.action_selected){ 
        Intent iw = new Intent(this,GetUserEmail.class);
    startActivity(iw);
    finish();
    }
    else

        if  (item.getItemId()==R.id.action_cancel){ 
            Intent iw = new Intent(this,RegisterActivity.class);
        startActivity(iw);
        finish();
        }
        return true;
    }   
    public void onBackPressed()
    {
        if(backButtonCount >= 1)
        {
            Intent intent = new Intent(Intent.ACTION_MAIN);
            intent.addCategory(Intent.CATEGORY_HOME);
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            startActivity(intent);
        }
        else
        {
            Toast.makeText(this, "Press the back button again to close.", Toast.LENGTH_SHORT).show();
            backButtonCount++;
        }
    }
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2 回答 2

0

得到它的工作，这是其他人的修复：

public class WebViewActivity extends Activity {

public WebView webView;
int backButtonCount = 0;
final Handler myHandler = new Handler();
public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.webview);
    Bundle extras = getIntent().getExtras();
        if(extras!=null){
            String rode=extras.getString("rode");
                     }
        String ray = extras.getString("rode");

    webView = (WebView) findViewById(R.id.webView1);
    webView.getSettings().setJavaScriptEnabled(true);
    final JavaScriptInterface myJavaScriptInterface = new JavaScriptInterface(this);

    webView.loadUrl("http://mywebsite.com/subDir/user_man.php?user=" + ray);
    webView.setWebViewClient(new WebViewClient());
    webView.addJavascriptInterface(myJavaScriptInterface, "ForwardFunction");
}


  public class JavaScriptInterface {
        Context mContext;

        JavaScriptInterface(Context c) {
            mContext = c;  }

        public void goHome(){
                Intent ik = new Intent(WebViewActivity.this, GetUserEmail.class);
                startActivity(ik);
                finish();
                Toast.makeText(WebViewActivity.this,"Your choices have been updated", Toast.LENGTH_LONG).show();
        }
  }


 @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.action_bar_two, menu);
        return true; }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) 
    {
    if(item.getItemId()==R.id.action_selected)
    {   Intent iw = new Intent(this,GetUserEmail.class);
        startActivity(iw);
        finish(); }
    else
        if(item.getItemId()==R.id.action_cancel)
        { 
        Intent iw = new Intent(this,RegisterActivity.class);
        startActivity(iw);
        finish();
        }
    return true;
    }   
    public void onBackPressed()
    {
        if(backButtonCount >= 1)
        {
            Intent intent = new Intent(Intent.ACTION_MAIN);
            intent.addCategory(Intent.CATEGORY_HOME);
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            startActivity(intent);
        }
        else
        {
            Toast.makeText(this, "Press the back button again to close.", Toast.LENGTH_SHORT).show();
            backButtonCount++;
        }
    }

}

于 2013-11-04T19:14:10.437 回答
0

我相信你的 if 语句的问题是 getHost() 它将只返回主机名 (www.google.com) 而不是整个 URL。尝试删除它，我相信如果匹配，您的 if 语句将返回 true。

于 2013-10-31T19:01:46.253 回答