Question

我想在导航抽屉中放置底部ListView的TextView。抛出java.lang.ClassCastException: android.widget.LinearLayout$LayoutParams cannot be cast to android.support.v4.widget.DrawerLayout$LayoutParams

main.xml中

    <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"
    >

    <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/content_frame"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingRight="@dimen/activity_horizontal_margin"
        android:paddingTop="0dp"
        android:paddingBottom="4dp"
    />

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:id="@+id/left_drawer"
        android:layout_gravity="start"
        >

        <ListView
            android:id="@+id/left_menu"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:choiceMode="singleChoice"
            android:dividerHeight="0.1dp"
            android:background="#111"
            android:divider="#FFF"
            />

        <TextView
            android:id="@+id/joke_text1"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:textSize="16sp"
            android:lineSpacingExtra="5sp"
            android:text="AAAAAA"
            />
    </LinearLayout>

</android.support.v4.widget.DrawerLayout>

和java代码：

// Getting reference to the DrawerLayout
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerLinear = (LinearLayout) findViewById(R.id.left_drawer);

leftMenuItems = getResources().getStringArray(R.array.leftMenuItems);

mDrawerList = (ListView) findViewById(R.id.left_menu);
mDrawerList.setOnItemClickListener(new DrawerItemClickListener());

// set a custom shadow that overlays the main content when the drawer opens
mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);

// Generate title
String[] title = new String[] { "item1", "item2", "item4", "item4" };

// Generate icon
int[] icon = new int[] { R.drawable.abc_ic_clear, R.drawable.abc_ic_clear,
        R.drawable.abc_ic_clear, R.drawable.abc_ic_clear };


MenuListAdapter adapter = new MenuListAdapter(this, title, icon);

// Setting the adapter on mDrawerList
mDrawerList.setAdapter(adapter);

// Getting reference to the ActionBarDrawerToggle
mDrawerToggle = new ActionBarDrawerToggle(
        this,
        mDrawerLayout,
        R.drawable.ic_drawer,
        R.string.drawer_open,
        R.string.drawer_close) {

    public void onDrawerOpened(View drawerView) {
        vstitle.setText("Menu");
        invalidateOptionsMenu();
    }

    public void onDrawerClosed(View view) {
        vstitle.setText("App");
        invalidateOptionsMenu();
    }


};

// Setting DrawerToggle on DrawerLayout
mDrawerLayout.setDrawerListener(mDrawerToggle);

我找到了一些相关的主题，但对我来说没什么用呢

Answer 1

Hoorray！我在代码中发现了问题。在函数selectItem中需要将mDrawerLayout.closeDrawer(mDrawerList);更改为mDrawerLayout.closeDrawer(mDrawerLinear); 现在它完美无缺！感谢所有

Answer 2

我尝试使用您的提供代码示例并做了一些修改。请检查一下它是否对您有帮助..

activity_main.xml文件

<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/content_frame"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="4dp"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="0dp" />

<LinearLayout
    android:id="@+id/left_drawer"
    android:layout_width="240dp"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:orientation="vertical" >

    <ListView
        android:id="@+id/left_menu"
        android:layout_width="match_parent"
        android:layout_height="300dip"
        android:background="#111"
        android:choiceMode="singleChoice"
        android:divider="#FFF"
        android:dividerHeight="0.1dp" />

    <TextView
        android:id="@+id/joke_text1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:lineSpacingExtra="5sp"
        android:text="AAAAAA"
        android:textColor="@android:color/white"
        android:textSize="16sp" />
</LinearLayout>

和MainActivity.java

package com.example.navdrawer;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
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.View;
import android.widget.ArrayAdapter;
import android.widget.LinearLayout;
import android.widget.ListView;

public class MainActivity extends Activity {
private DrawerLayout mDrawerLayout;
private LinearLayout mDrawerLinear;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;

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



    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
    mDrawerLinear = (LinearLayout) findViewById(R.id.left_drawer);

    //leftMenuItems = getResources().getStringArray(R.array.leftMenuItems);

    mDrawerList = (ListView) findViewById(R.id.left_menu);
    //mDrawerList.setOnItemClickListener(new DrawerItemClickListener());

    // set a custom shadow that overlays the main content when the drawer opens
    //mDrawerLayout.setDrawerShadow(R.drawable.ic_launcher, GravityCompat.START);

    // Generate title
    String[] title = new String[] { "item1", "item2", "item4", "item4" };

    // Generate icon
    int[] icon = new int[] { R.drawable.ic_launcher, R.drawable.ic_launcher,
            R.drawable.ic_launcher, R.drawable.ic_launcher };


    ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,
        android.R.layout.simple_spinner_item, title);



    //MenuListAdapter adapter = new MenuListAdapter(this, title, icon);

    // Setting the adapter on mDrawerList
    mDrawerList.setAdapter(dataAdapter);

    // Getting reference to the ActionBarDrawerToggle
    mDrawerToggle = new ActionBarDrawerToggle(
            this,
            mDrawerLayout,
            R.drawable.ic_launcher,
            R.drawable.ic_launcher,
            R.drawable.ic_launcher) {

        @SuppressLint("NewApi")
        public void onDrawerOpened(View drawerView) {
         //   vstitle.setText("Menu");
            invalidateOptionsMenu();
        }

        @SuppressLint("NewApi")
        public void onDrawerClosed(View view) {
          //  vstitle.setText("App");
            invalidateOptionsMenu();
        }


    };

    // Setting DrawerToggle on DrawerLayout
    mDrawerLayout.setDrawerListener(mDrawerToggle);
}

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

}

Answer 3

如果您正在使用Eclipse，请尝试执行Project->Clean。

此外，从xml中删除xmlns:android="http://schemas.android.com/apk/res/android定义，因为没有必要。

导航抽屉中的LinearLayout

main.xml中

和java代码：

3 个答案: