Android如何為導航抽屜中的選定項目設置背景顏色？

Question

在我的App中，我使用Navigation Drawer創建了Side Menu。我需要根據單擊狀態更改菜單列表項的背景色，因此我使用<selector>來實現這一目的。

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >

    <item android:state_pressed="true" ><color android:color="@color/red"/></item>  
    <item android:state_focused="true"><color android:color="@color/yellow"/></item>
    <item android:state_activated="true"><color android:color="@color/green"/></item>
    <item><color android:color="#ddd"/></item>

</selector>

上面的代碼工作正常。 單擊導航抽屜中的某個項目后，根據上述選擇器，背景顏色會發生變化，並且導航抽屜也將關閉。

但是我的問題是，如果我打開導航抽屜菜單項的背景色變為默認值。 所以我需要為菜單項設置相同的背景色。

然后，如果我打開導航抽屜，則菜單項為默認顏色。無背景色。

但是我需要根據當前活動為菜單項設置背景色。

僅在關閉導航抽屜時背景色才會消失。

請幫我。

對不起，我英語不好。

提前致謝。

我的代碼：

package com.example.qh_test;

import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarActivity;
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.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class TechPageActivity extends ActionBarActivity implements
        OnItemClickListener {

    private DrawerLayout drawerlayout;
    private ListView listview;
    private String[] menus;
    private ActionBarDrawerToggle drawerListener;

    private class MyWebViewClient extends WebViewClient {

        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {         
            view.loadUrl(url);
            return true;
        }

    }

    WebView webview;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_tech_page);
        drawerlayout = (DrawerLayout) findViewById(R.id.drawerlayout);
        drawerListener = new ActionBarDrawerToggle(this, drawerlayout,
                R.drawable.ic_drawer, R.string.drawer_open,
                R.string.drawer_close) {
            @Override
            public void onDrawerOpened(View drawerView) {
                // TODO Auto-generated method stub
                super.onDrawerOpened(drawerView);



            }

            @Override
            public void onDrawerClosed(View drawerView) {
                // TODO Auto-generated method stub

            }
        };

        drawerlayout.setDrawerListener(drawerListener);
        getSupportActionBar().setHomeButtonEnabled(true);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        menus = getResources().getStringArray(R.array.tech_menus);
        listview = (ListView) findViewById(R.id.drawerList);
        listview.setAdapter(new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_single_choice, menus));
        listview.setOnItemClickListener(this);
        webview = (WebView) findViewById(R.id.homeWebView);
        webview.getSettings().setJavaScriptEnabled(true);
        webview.setWebViewClient(new MyWebViewClient());
        webview.loadUrl("http://stackoverflow.com/");               


    }


    @Override
    protected void onPostCreate(Bundle savedInstanceState) {

        // TODO Auto-generated method stub
        super.onPostCreate(savedInstanceState);
        drawerListener.syncState();

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.tech_page, menu);
        return true;
    }


    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.

        int id = item.getItemId();
        if (drawerListener.onOptionsItemSelected(item)) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        // TODO Auto-generated method stub
        super.onConfigurationChanged(newConfig);
        drawerListener.onConfigurationChanged(newConfig);
    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
            long id) {
        // TODO Auto-generated method stub

        selectItem(position);


        //SelectItem.get(position).setColor(getResources().getColor("your color")); 

        switch (position) {

        case 0:
            webview.loadUrl("http://stackoverflow.com/");

            listview.setItemChecked(position, true);

            drawerlayout.closeDrawer(listview);

            break;
        case 1:
            webview.loadUrl("http://stackoverflow.com/questions");
            listview.setItemChecked(position, true);
            drawerlayout.closeDrawers();
            break;
        case 2:
            webview.loadUrl("http://stackoverflow.com/unanswered");
            listview.setItemChecked(position, true);
            drawerlayout.closeDrawers();
            break;

        }

    }

    public void selectItem(int position) {

        // TODO Auto-generated method stub
        listview.setItemChecked(position, true);    

        setTitle(menus[position]);

    }

    public void setTitle(String title) {
        getSupportActionBar().setTitle(title);

    }

}

Answer 1

檢查此樣本自定義導航抽屜

內部onclick

  SelectItem.get(position).setColor(getResources().getColor("your color")); 

http://www.tutecentral.com/android-custom-navigation-drawer/

Answer 2

您可以在活動的onStart方法中調用這樣的方法（ListView mDrawerList和DrawerAdapter作為mDrawerAdapter）：

protected void selectItem(int position)
{
    if (mDrawerList != null) {
        mDrawerList.setItemChecked(position, true);
        mDrawerAdapter.setSelected(position);
    }
}

Answer 3

在用於NavigationDrawer的OnClickListener菜單中，調用方法setItemChecked（int position，true）