Question

我对此代码感到困惑我有6个菜单项我希望它在网页视图中加载不同的网页但我看不到在选择第3项时我可以说的地方这样做，有人可以帮忙吗？

@Override
    public boolean onOptionsItemSelected(MenuItem item) {

        // call ActionBarDrawerToggle.onOptionsItemSelected(), if it returns true
        // then it has handled the app icon touch event

            if (actionBarDrawerToggle.onOptionsItemSelected(item)) {
        return true;
    }
        return super.onOptionsItemSelected(item);
    }

请不要因此而滥用我只是需要帮助：/

my strings.xml

<string-array name="items">
    <item>Item 1</item>
    <item>Item 2</item>
    <item>Item 3</item>
    <item>Item 4</item>
    <item>Item 5</item>
    <item>Item 6</item>
</string-array>

所以每次点击不同的项目时都会执行mWebView.loadUrl（“”）;

完整代码：

 package com.purelymean.purelymean;

 import android.os.Bundle;
 import android.app.Activity;
 import android.content.res.Configuration;
 import android.support.v4.app.ActionBarDrawerToggle;
 import android.support.v4.view.GravityCompat;
 import android.support.v4.widget.DrawerLayout;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.webkit.WebView;
 import android.webkit.WebViewClient;
 import android.widget.AdapterView;
 import android.widget.ArrayAdapter;
 import android.widget.ListView;
 import android.widget.TextView;
 import android.widget.Toast;

 public class Main extends Activity {

private String[] drawerListViewItems;
private DrawerLayout drawerLayout;
private ListView drawerListView;
private ActionBarDrawerToggle actionBarDrawerToggle;
WebView mWebView;

protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);

            mWebView = (WebView) findViewById(R.id.webView1);
            mWebView.getSettings().setJavaScriptEnabled(true);
            mWebView.loadUrl("http://www.google.com/");
            mWebView.setWebViewClient(new WebViewClient());

            // get list items from strings.xml
            drawerListViewItems = getResources().getStringArray(R.array.items);
            // get ListView defined in activity_main.xml
            drawerListView = (ListView) findViewById(R.id.left_drawer);

            // Set the adapter for the list view
            drawerListView.setAdapter(new ArrayAdapter<String>(this,
            R.layout.drawer_listview_item, drawerListViewItems));

            // 2. App Icon 
            drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);

            // 2.1 create ActionBarDrawerToggle
            actionBarDrawerToggle = new ActionBarDrawerToggle(
            this,                  /* host Activity */
            drawerLayout,         /* DrawerLayout object */
            R.drawable.ic_drawer,  /* nav drawer icon to replace 'Up' caret */
            R.string.drawer_open,  /* "open drawer" description */
            R.string.drawer_close  /* "close drawer" description */
            );

    // 2.2 Set actionBarDrawerToggle as the DrawerListener
    drawerLayout.setDrawerListener(actionBarDrawerToggle);

    // 2.3 enable and show "up" arrow


    // just styling option
            drawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);

            drawerListView.setOnItemClickListener(new DrawerItemClickListener());


    }



    @Override
protected void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);
    // Sync the toggle state after onRestoreInstanceState has occurred.
     actionBarDrawerToggle.syncState();
}

    @Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    actionBarDrawerToggle.onConfigurationChanged(newConfig);
}


    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
               case R.id.first:
                   // do something based on first item click
                   return true;
               case R.id.second:
                   // do something based on second item
                   return true;
       }

        return super.onOptionsItemSelected(item);
    }


    private class DrawerItemClickListener implements ListView.OnItemClickListener {
        @Override
        public void onItemClick(AdapterView parent, View view, int position, long id) {
                Toast.makeText(Main.this, ((TextView)view).getText(), Toast.LENGTH_LONG).show();
                drawerLayout.closeDrawer(drawerListView);

        }
    }


   }

Answer 1

您应该在onItemClick()中实施DrawerItemClickListener，如下所示。 onOptionsItemSelected()方法应保持原样。

private class DrawerItemClickListener implements ListView.OnItemClickListener {
    @Override
    public void onItemClick(AdapterView parent, View view, int position, long id) {
            if(position == 0){
                // first item clicked, open url
            } else if(position == 1){
                // second item clicked, open url
            }
            drawerLayout.closeDrawer(drawerListView);

    }
}

您可以找到非常详细的教程here。

~~您可以通过为每个项目分别设置一个ID，然后在onOptionsItemSelected()中检查一下这样做：~~

@Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.first: // do something based on first item click return true; case R.id.second: // do something based on second item return true; } return super.onOptionsItemSelected(item); }

<击>

Android onOptionsItemSelected

1 个答案: