使用android抽屉投射异常

时间：2015-05-13 13:01:18

标签： java android classcastexception

大街，

我正在学习Android抽屉： “http://www.androidhive.info/2013/11/android-sliding-menu-using-navigation-drawer/” 我遇到了一个奇怪的问题。当应用程序启动它时抛出：

data

Actuall投掷部分：

05-13 12:50:08.325    2030-2030/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.lanceit.haito.lanceit, PID: 2030
    java.lang.ClassCastException: android.widget.RelativeLayout$LayoutParams cannot be cast to android.support.v4.widget.DrawerLayout$LayoutParams
            at android.support.v4.widget.DrawerLayout.isDrawerView(DrawerLayout.java:1100)
            at android.support.v4.widget.DrawerLayout.isDrawerOpen(DrawerLayout.java:1350)
            at com.lanceit.haito.lanceit.activities.HubActivity.onPrepareOptionsMenu(HubActivity.java:183)
            at android.app.Activity.onPreparePanel(Activity.java:2838)
            at android.support.v4.app.FragmentActivity.onPrepareOptionsPanel(FragmentActivity.java:469)
            at android.support.v7.app.ActionBarActivity.superOnPrepareOptionsPanel(ActionBarActivity.java:284)
            at android.support.v7.app.ActionBarActivityDelegate.onPrepareOptionsPanel(ActionBarActivityDelegate.java:204)
            at android.support.v7.app.ActionBarActivity.onPrepareOptionsPanel(ActionBarActivity.java:256)
            at android.support.v4.app.FragmentActivity.onPreparePanel(FragmentActivity.java:458)
            at android.support.v7.app.ActionBarActivity.superOnPreparePanel(ActionBarActivity.java:280)
            at android.support.v7.app.ActionBarActivityDelegate$1.onPreparePanel(ActionBarActivityDelegate.java:84)
            at android.support.v7.app.ActionBarActivityDelegateBase.preparePanel(ActionBarActivityDelegateBase.java:1006)
            at android.support.v7.app.ActionBarActivityDelegateBase.doInvalidatePanelMenu(ActionBarActivityDelegateBase.java:1182)
            at android.support.v7.app.ActionBarActivityDelegateBase.access$100(ActionBarActivityDelegateBase.java:79)
            at android.support.v7.app.ActionBarActivityDelegateBase$1.run(ActionBarActivityDelegateBase.java:118)
            at android.os.Handler.handleCallback(Handler.java:739)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5221)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)

代码：

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

相关的XML文件：

import android.content.Context;
import android.content.res.Configuration;
import android.content.res.TypedArray;
import android.location.LocationManager;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.PagerTitleStrip;
import android.support.v4.view.ViewPager;
import android.support.v4.widget.DrawerLayout;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ListView;

import com.android.volley.RequestQueue;
import com.android.volley.toolbox.Volley;
import com.lanceit.haito.lanceit.R;
import com.lanceit.haito.lanceit.model.User;
import com.lanceit.haito.lanceit.utils.GeoLocationManager;
import com.lanceit.haito.lanceit.view.PageTransformer;
import com.lanceit.haito.lanceit.view.drawer.adapter.DrawerListAdapter;
import com.lanceit.haito.lanceit.view.drawer.model.DrawerItem;
import com.lanceit.haito.lanceit.view.hubFragments.AddFragment;
import com.lanceit.haito.lanceit.view.hubFragments.LanceListFragment;
import com.lanceit.haito.lanceit.view.hubFragments.ListAllFragment;
public class HubActivity extends ActionBarActivity implements AddFragment.OnFragmentInteractionListener, ListAllFragment.OnFragmentInteractionListener {

    private DrawerLayout mDrawerLayout;
    private ListView mDrawerList;
    private ActionBarDrawerToggle mDrawerToggle;

    // nav drawer title
    private CharSequence mDrawerTitle;

    // used to store app title
    private CharSequence mTitle;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_hub);

        mTitle = mDrawerTitle = getTitle();

        // load slide menu items
        String[] navMenuTitles = getResources().getStringArray(R.array.nav_drawer_items);

        // nav drawer icons from resources
        TypedArray navMenuIcons = getResources()
                .obtainTypedArray(R.array.nav_drawer_icons);

        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        mDrawerList = (ListView) findViewById(R.id.list_slidermenu);

        ArrayList<DrawerItem> navDrawerItems = new ArrayList<DrawerItem>();

        // adding nav drawer items to array
        // Home
        navDrawerItems.add(new DrawerItem(navMenuTitles[0], navMenuIcons.getResourceId(0, -1)));
        // Find People
        navDrawerItems.add(new DrawerItem(navMenuTitles[1], navMenuIcons.getResourceId(1, -1)));
        // Photos
        navDrawerItems.add(new DrawerItem(navMenuTitles[2], navMenuIcons.getResourceId(2, -1)));
        // Communities, Will add a counter here
        navDrawerItems.add(new DrawerItem(navMenuTitles[3], navMenuIcons.getResourceId(3, -1), true, "22"));
        // Pages
        navDrawerItems.add(new DrawerItem(navMenuTitles[4], navMenuIcons.getResourceId(4, -1)));
        // What's hot, We  will add a counter here
        navDrawerItems.add(new DrawerItem(navMenuTitles[5], navMenuIcons.getResourceId(5, -1), true, "50+"));


        // Recycle the typed array
        navMenuIcons.recycle();

        // setting the nav drawer list adapter
        DrawerListAdapter adapter = new DrawerListAdapter(getApplicationContext(), navDrawerItems);
        mDrawerList.setAdapter(adapter);

        // enabling action bar app icon and behaving it as toggle button
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setHomeButtonEnabled(true);

        mDrawerToggle = new ActionBarDrawerToggle(this,
                mDrawerLayout,
                R.drawable.ic_drawer, //nav menu toggle icon
                R.string.app_name, // nav drawer open - description for accessibility
                R.string.app_name // nav drawer close - description for accessibility
        ) {
            public void onDrawerClosed(View view) {
                getSupportActionBar().setTitle(mTitle);
                // calling onPrepareOptionsMenu() to show action bar icons
                invalidateOptionsMenu();
            }

            public void onDrawerOpened(View drawerView) {
                getSupportActionBar().setTitle(mDrawerTitle);
                // calling onPrepareOptionsMenu() to hide action bar icons
                invalidateOptionsMenu();
            }
        };
        mDrawerLayout.setDrawerListener(mDrawerToggle);
    }

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

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // toggle nav drawer on selecting action bar app icon/title
        if (mDrawerToggle.onOptionsItemSelected(item)) {
            return true;
        }
        // Handle action bar actions click
        switch (item.getItemId()) {
            case R.id.action_settings:
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }

    /**
     * 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);
    }

    @Override
    public void setTitle(CharSequence title) {
        mTitle = title;
        getSupportActionBar().setTitle(mTitle);
    }

    /**
     * When using the ActionBarDrawerToggle, you must call it during
     * onPostCreate() and onConfigurationChanged()...
     */

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

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        // Pass any configuration change to the drawer toggls
        mDrawerToggle.onConfigurationChanged(newConfig);
    }


}

Debugger

1 个答案:

答案 0 :(得分：0)

我认为你的mDrawerList应该直接在DrawerLayout中，这就是为什么它告诉你无法转换布局参数。您发布的示例中的xml应该如下所示：

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">

    <android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@drawable/bg1"
        tools:context="com.lanceit.haito.lanceit.activities.HubActivity">

    <android.support.v4.view.PagerTitleStrip
        android:id="@+id/pager_strip"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/primary_material_dark"
        android:paddingBottom="10dp"
        android:paddingTop="10dp" />
    </android.support.v4.view.ViewPager>
    <CheckedTextView
        android:id="@+id/home_drawer_cv_banks"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:background="@android:color/holo_red_light"
        android:focusable="true"
        android:text="Some Dummy Text"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:textColor="#FFF" />
    <ListView
        android:id="@+id/list_slidermenu"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:background="@android:color/holo_red_light"
        android:choiceMode="singleChoice"
        android:divider="@android:color/black"
        android:dividerHeight="5dp" >
    </ListView>

再看一下您给出的示例http://www.androidhive.info/2013/11/android-sliding-menu-using-navigation-drawer/

P.S。另一种方法是在不改变你的xml的情况下传递给你的LinearLayout的isDrawerOpen方法，其中ListView是直接进入你的DrawerLayout，所以这是一个具有RelativeLayout的那个。请参阅此问题What do you need to pass to v4.widget.DrawerLayout.isDrawerOpen()/.openDrawer()/.closeDrawer()

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