Question

下面是我的代码，每当我运行它时，它都会崩溃........

我正在尝试将一个字符串列表放入ListView，但每当我收到错误消息时：

致命异常：主要无法启动活动ComponentInfo {com.ss.website/com.ss.website.MainActivity}：java.lang.ClassCastException：android.widget.SlidingDrawer无法在android.app中强制转换为android.support.v4.widget.DrawerLayout。 ActivityThread.performLaunchActivity（ActivityThread.java:2338）

提前致谢。

package com.ss.website;


import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.LinearLayout;
import android.widget.ListView;

public class MainActivity extends ActionBarActivity {

    private DrawerLayout drawer;
    private ListView listview;  
    private String[] planets;
    private LinearLayout linearLayout;

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

        drawer = (DrawerLayout) findViewById(R.id.slidingDrawer1);
        planets=getResources().getStringArray(R.array.planets);
        linearLayout = (LinearLayout)findViewById(R.id.content);
        listview= (ListView) findViewById(R.id.listView1);


        listview.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, planets));

    }


}

Answer 1

简单：DrawerLayout不是SlidingDrawer的子类或超类。

我运行代码时我的应用程序崩溃了。错误是：“android.widget.SlidingDrawer无法强制转换为android.support.v4.widget.Drawerlayout”

1 个答案: