Question

我是java的新手。我已经创建了一个listview，并将我的包命名为AndroidList，并尝试在模拟器上查看它是如何工作的，但它会显示错误“不幸的是Androidlist已停止”。

这是.java代码

package com.exercise.androidlist;

import android.app.ListActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;

public class AndroidList extends ListActivity {

 String[] DayOfWeek = {"Sunday", "Monday", "Tuesday",
   "Wednesday", "Thursday", "Friday", "Saturday"
 };

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //setContentView(R.layout.main);
        setListAdapter(new ArrayAdapter<String>(this, 
        android.R.layout.simple_list_item_1, DayOfWeek));
    }
}

这是logcat

    02-13 21:24:02.330: W/Trace(409): Unexpected value from nativeGetEnabledTags: 0
    02-13 21:24:02.330: W/Trace(409): Unexpected value from nativeGetEnabledTags: 0
    02-13 21:24:02.390: W/Trace(409): Unexpected value from nativeGetEnabledTags: 0
    02-13 21:24:02.390: W/Trace(409): Unexpected value from nativeGetEnabledTags: 0
    02-13 21:24:02.500: W/Trace(409): Unexpected value from nativeGetEnabledTags: 0
    02-13 21:24:02.531: W/Trace(409): Unexpected value from nativeGetEnabledTags: 0
    02-13 21:24:02.531: I/Choreographer(409): Skipped 35 frames! The application may be      doing too much work on its main thread.
    02-13 21:24:02.600: W/Trace(409): Unexpected value from nativeGetEnabledTags: 0
    02-13 21:24:02.600: W/Trace(409): Unexpected value from nativeGetEnabledTags: 0
    02-13 21:24:02.693: W/Trace(409): Unexpected value from nativeGetEnabledTags: 0
    02-13 21:24:02.693: W/Trace(409): Unexpected value from nativeGetEnabledTags: 0
    02-13 21:24:02.720: I/Choreographer(409): Skipped 44 frames!  The application may be doing too much work on its main thread.

   02-13 21:24:02.812: E/StrictMode(628): android.app.ServiceConnectionLeaked: Service    com.android.exchange.ExchangeService has leaked ServiceConnection com.android.emailcommon.service.ServiceProxy$ProxyConnection@40cda940 that was originally bound here
02-13 21:24:02.812: E/StrictMode(628):  at android.app.LoadedApk$ServiceDispatcher.<init>(LoadedApk.java:969)
02-13 21:24:02.812: E/StrictMode(628):  at android.app.LoadedApk.getServiceDispatcher(LoadedApk.java:863)
02-13 21:24:02.812: E/StrictMode(628):  at android.app.ContextImpl.bindService(ContextImpl.java:1418)
02-13 21:24:02.812: E/StrictMode(628):  at android.app.ContextImpl.bindService(ContextImpl.java:1407)
02-13 21:24:02.812: E/StrictMode(628):  at android.content.ContextWrapper.bindService(ContextWrapper.java:473)
02-13 21:24:02.812: E/StrictMode(628):  at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:157)
02-13 21:24:02.812: E/StrictMode(628):  at 
02-13 21:24:05.291: W/Trace(409): Unexpected value from nativeGetEnabledTags: 0
02-13 21:24:05.291: W/Trace(409): Unexpected value from nativeGetEnabledTags: 0
02-13 21:24:05.380: W/Trace(409): Unexpected value from nativeGetEnabledTags: 0
02-13 21:24:05.380: W/Trace(409): Unexpected value from nativeGetEnabledTags: 0
02-13 21:24:05.411: I/Choreographer(409): Skipped 39 frames!  The application may be doing too much work on its main thread.

Answer 1

setContentView(R.layout.main);对于加载活动布局非常重要= P

 @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        setListAdapter(new ArrayAdapter<String>(this, 
        android.R.layout.simple_list_item_1, DayOfWeek));
    }

并且LogCat的消息与查找原因无关，请查找“例外”一词：）

Answer 2

可能是因为应用程序没有加载任何视图？取消注释//setContentView(R.layout.main);然后重试。

Answer 3

使用Listview创建ListActivity时，两件事必须包含一个ListView，android:id属性设置为@android：id / list（NOT android：id = “@ + id / list”）。

如果您定义ListView并将android:id属性设置为
@ + id / list然后它会给出错误。

            public class AndroidList extends ListActivity {

             String[] DayOfWeek = {"Sunday", "Monday", "Tuesday",
               "Wednesday", "Thursday", "Friday", "Saturday"
             };

                /** Called when the activity is first created. */
                @Override
                public void onCreate(Bundle savedInstanceState) {
                    super.onCreate(savedInstanceState);
                    setContentView(R.layout.main);

                // Define a new Adapter
                    // First parameter - Context
                    // Second parameter - Layout for the row
                    // Third - the Array of data

                    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                                     android.R.layout.simple_list_item_1, DayOfWeek);
                    // Assign adapter to List
                    setListAdapter(adapter); 
                }
            }

适配器用于向ListView提供数据参数： simple_list_item_1：Android内部布局视图 values：用户定义的数据数组。

       ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
           android.R.layout.simple_list_item_1, DayOfWeek);

         // Assign adapter to List
           setListAdapter(adapter);

加载应用时出错

3 个答案: