java - android 抽屉导航不想被点击

Question

我有一个奇怪的错误，我的抽屉导航似乎没有意识到它被单击。我搜索了很多东西，但似乎找不到答案。

 package com.BlackSheepApps.Eventpost.activities;

    import android.app.ActionBar;
    import android.app.Activity;
    import android.content.Intent;
    import android.content.res.Configuration;
    import android.content.res.Resources;
    import android.graphics.drawable.ColorDrawable;
    import android.os.Bundle;
    import android.support.v4.app.ActionBarDrawerToggle;
    import android.support.v4.widget.DrawerLayout;
    import android.util.Log;
    import android.view.LayoutInflater;
    import android.view.MenuItem;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.AdapterView;
    import android.widget.ListView;

    import com.BlackSheepApps.Eventpost.R;
    import com.BlackSheepApps.Eventpost.adapters.AdapterNavigationDrawer;

public class ActivityBasic extends Activity{

    private ActionBar actionbar;
    private Resources resources;
    private String[] drawerStrings;
    private DrawerLayout drawerLayout;
    private ActionBarDrawerToggle drawerToggle;
    private ListView drawerList;

    @Override
    public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);

        setContentView(R.layout.drawer_layout);


        //sets the customized action bar
        actionbar = getActionBar();
        resources = getResources();
        actionbar.setBackgroundDrawable(new ColorDrawable(resources.getColor(R.color.opaque_blue)));

        //make the drawer
        drawerStrings = resources.getStringArray(R.array.drawer_categories);
        drawerLayout = (DrawerLayout)findViewById(R.id.drawer_layout);
        drawerList = (ListView)findViewById(R.id.left_drawer);

        drawerList.setAdapter(new AdapterNavigationDrawer(this, -1, drawerStrings));
        drawerList.setOnItemClickListener(new DrawerItemClickListener());

        drawerToggle = new ActionBarDrawerToggle(this, drawerLayout, R.drawable.ic_drawer, R.string.app_name, R.string.app_name) {

            /** Called when a drawer has settled in a completely closed state. */
            public void onDrawerClosed(View view) {
                super.onDrawerClosed(view);
                invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
            }

            /** Called when a drawer has settled in a completely open state. */
            public void onDrawerOpened(View drawerView) {
                super.onDrawerOpened(drawerView);
                invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
            }
        };

        // Set the drawer toggle as the DrawerListener
        drawerLayout.setDrawerListener(drawerToggle);

        getActionBar().setDisplayHomeAsUpEnabled(true);
        getActionBar().setHomeButtonEnabled(true);

        registerViews();

    }

    /**
     * This method is used for registering the views in the layout, BUT First you'll have to start using a self created method : registerLayout(int layout_id) to register the right layout in the right 
     * place.
     * 
     */
    protected void registerViews(){

    }

    protected void ActionBarItemRemover(){

    }

    protected void registerLayout(int layout_id){
        LayoutInflater inflater = (LayoutInflater)this.getSystemService(LAYOUT_INFLATER_SERVICE);
        View childView = inflater.inflate(layout_id, (ViewGroup)findViewById(layout_id));
        drawerLayout.addView(childView);
    }

    private class DrawerItemClickListener implements ListView.OnItemClickListener {

        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                long arg3) {
            Log.d("Eventpost", "clicked");
            selectItem(arg2);

        }

    }

    private void selectItem(int position){
        switch(position){
        case 0:
            startActivity(new Intent(this, ActivityHomeScreen.class));
            break;
        case 4:
            startActivity(new Intent(this, ActivityProperties.class));
            break;
        }
    }


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

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

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Pass the event to ActionBarDrawerToggle, if it returns
        // true, then it has handled the app icon touch event
        if (drawerToggle.onOptionsItemSelected(item)) {
          return true;
        }

        return super.onOptionsItemSelected(item);
    }

}

适配器:

package com.BlackSheepApps.Eventpost.adapters;

import android.content.Context;
import android.content.res.Resources;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;

import com.BlackSheepApps.Eventpost.R;

public class AdapterNavigationDrawer extends ArrayAdapter<String>{

    String[] button_names;
    Resources resources;

    public AdapterNavigationDrawer(Context context, int resource,
            String[] objects) {
        super(context, resource, objects);
        button_names = objects;
    }

    @Override
    public View getView(int pos, View convertView, ViewGroup parent){
        RelativeLayout row = (RelativeLayout)convertView;

        if(null == row){
            //No recycled View, we have to inflate one.
            LayoutInflater inflater = (LayoutInflater)parent.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            row = (RelativeLayout)inflater.inflate(R.layout.drawer_row, null);
        }

        TextView text = (TextView) row.findViewById(R.id.drawer_text);
        //ImageView image =(ImageView) row.findViewById(R.id.drawer_image);
        text.setText(button_names[pos]);

        return row;
    }



}

布局:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    >

        <TextView
            android:id="@+id/drawer_text"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textSize="23sp" 
            android:textColor="#FDFFED"
            android:layout_marginLeft="5dp"
            android:layout_marginTop="20dp"/>

</RelativeLayout>

当我尝试单击抽屉中的某个项目时，调试代码不会显示在控制台中，因此它不知道它已被单击。作为记录，我确实在 list 中注册了 Activity ......

Answer 1

在您调用的抽屉切换上，invalidateOptionsMenu();//创建对 onPrepareOptionsMenu() 的调用，明确指出它将调用 onPrepareOptionsMenu() 方法。但是它尚未实现，因此您的抽屉导航没有响应点击。

将其实现为，

/***
 * Called when invalidateOptionsMenu() is triggered
 */
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
    // if nav drawer is opened, hide the action items
    boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
    menu.findItem(R.id.action_settings).setVisible(!drawerOpen);
    return super.onPrepareOptionsMenu(menu);
}

来源here .

根据您的代码和要求自定义上述内容，它应该可以工作。您还可以查看上面的链接，获取有关此主题的分步教程。享受编码的乐趣和快乐。 :)

编辑:

像这样，创建一个 boolean 变量isDrawerOpen并将其设置如下，

       public void onDrawerClosed(View view) {
            super.onDrawerClosed(view);

            isDrawerOpen = false;
            // supportInvalidateOptionsMenu(); // creates call to
            // onPrepareOptionsMenu()
        }

        /** Called when a drawer has settled in a completely open state. */
        public void onDrawerOpened(View drawerView) {
            super.onDrawerOpened(drawerView);
            isDrawerOpen = true;
            // supportInvalidateOptionsMenu(); // creates call to
            // onPrepareOptionsMenu()
        }

然后在您的项目上单击抽屉中的 View ，调用 closeDrawer(); 方法，如下所示，

public void closeDrawer() {
    if (isDrawerOpen) {
        mDrawerLayout
                .closeDrawer((LinearLayout) findViewById(R.id.left_drawer));
    }
}