我创建了一个xml文件，其中显示了两个列表视图，如下所示：
<?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="match_parent"
android:background="#fff" >
<LinearLayout
android:id="@+id/top_layover"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:background="@drawable/blue_gradient"
android:orientation="horizontal" >
<TextView
style="@style/BlackText"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:text="זמני יום חול"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
<LinearLayout
android:id="@+id/top_layover2"
android:layout_below="@id/top_layover"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_marginTop="5dp"
android:background="@drawable/blue_gradient"
android:orientation="horizontal" >
<TextView
style="@style/BlackText"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:text="ראשון עד חמישי"
android:textSize="16sp"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
<LinearLayout
android:id="@+id/lists"
android:layout_below="@+id/top_layover2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:weightSum="100"
android:orientation="vertical">
<LinearLayout
android:id="@+id/list1_la"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="40"
>
<ListView
android:id="@+id/weeklylist"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#fff"
android:divider="@android:color/transparent"
android:scrollbars="none" />
</LinearLayout>
<LinearLayout
android:id="@+id/bottom_layover"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@id/list1_la"
android:layout_alignParentLeft="true"
android:layout_marginTop="5dp"
android:background="@drawable/blue_gradient"
android:orientation="horizontal"
android:layout_weight="1" >
<TextView
style="@style/BlackText"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:text="יום שישי"
android:textSize="16sp"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
<LinearLayout
android:id="@+id/list2_la"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/bottom_layover"
android:layout_weight="59">
<ListView
android:id="@+id/weeklylist2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#fff"
android:divider="@android:color/transparent"
android:scrollbars="none" />
</LinearLayout>
我试图设置我在java类中创建的适配器，但每次我启动应用程序崩溃的活动时都会：
package com.example.neotavraham;
import java.util.ArrayList;
import java.util.HashMap;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import com.example.neotavraham.Messages.LoadComments;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.AdapterView.OnItemClickListener;
public class WeeklyPrays extends ListActivity{
ListView lv;
// Progress Dialog
private ProgressDialog pDialog;
//php read comments script
//localhost :
//testing on your device
//put your local ip instead, on windows, run CMD > ipconfig
//or in mac's terminal type ifconfig and look for the ip under en0 or en1
// private static final String READ_COMMENTS_URL = "http://xxx.xxx.x.x:1234/webservice/comments.php";
//testing on Emulator:
private static final String READ_WEEKLY_PRAYS_URL = "http://www.neotavraham.netne.net/webservice/weeklyprays.php";
//testing from a real server:
//private static final String READ_COMMENTS_URL = "http://www.mybringback.com/webservice/comments.php";
//JSON IDS:
private static final String TAG_SUCCESS = "success";
private static final String TAG_PRAY = "pray";
private static final String TAG_TIME = "time";
private static final String TAG_PLACE = "place";
private static final String TAG_POSTS = "posts";
private static final String TAG_POST_ID = "post_id";
//it's important to note that the message is both in the parent branch of
//our JSON tree that displays a "Post Available" or a "No Post Available" message,
//and there is also a message for each individual post, listed under the "posts"
//category, that displays what the user typed as their message.
//An array of all of our comments
private JSONArray mComments = null;
//manages all of our comments in a list.
private ArrayList<HashMap<String, String>> mCommentList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//note that use read_comments.xml instead of our single_post.xml
setContentView(R.layout.read_weekly_times);
lv = (ListView) findViewById(R.id.weeklylist);
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
//loading the comments via AsyncTask
new LoadWeeklyPrays().execute();
}
/**
* Retrieves recent post data from the server.
*/
public void updateJSONdata() {
// Instantiate the arraylist to contain all the JSON data.
// we are going to use a bunch of key-value pairs, referring
// to the json element name, and the content, for example,
// message it the tag, and "I'm awesome" as the content..
mCommentList = new ArrayList<HashMap<String, String>>();
// Bro, it's time to power up the J parser
JSONParser jParser = new JSONParser();
// Feed the beast our comments url, and it spits us
//back a JSON object. Boo-yeah Jerome.
JSONObject json = jParser.getJSONFromUrl(READ_WEEKLY_PRAYS_URL);
//when parsing JSON stuff, we should probably
//try to catch any exceptions:
try {
//I know I said we would check if "Posts were Avail." (success==1)
//before we tried to read the individual posts, but I lied...
//mComments will tell us how many "posts" or comments are
//available
mComments = json.getJSONArray(TAG_POSTS);
// looping through all posts according to the json object returned
for (int i = 0; i < mComments.length(); i++) {
JSONObject c = mComments.getJSONObject(i);
//gets the content of each tag
String pray = c.getString(TAG_PRAY);
String time = c.getString(TAG_TIME);
String place = c.getString(TAG_PLACE);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
map.put(TAG_PRAY, pray);
map.put(TAG_TIME, time);
map.put(TAG_PLACE, place);
// adding HashList to ArrayList
mCommentList.add(map);
//annndddd, our JSON data is up to date same with our array list
}
} catch (JSONException e) {
e.printStackTrace();
}
}
/**
* Inserts the parsed data into the listview.
*/
private void updateList() {
// For a ListActivity we need to set the List Adapter, and in order to do
//that, we need to create a ListAdapter. This SimpleAdapter,
//will utilize our updated Hashmapped ArrayList,
//use our single_post xml template for each item in our list,
//and place the appropriate info from the list to the
//correct GUI id. Order is important here.
ListAdapter adapter = new SimpleAdapter(this, mCommentList,
R.layout.single_time_box, new String[] { TAG_PRAY, TAG_TIME,TAG_PLACE
}, new int[] { R.id.pray, R.id.pray_time,R.id.place});
// I shouldn't have to comment on this one:
lv.setAdapter(adapter);
// Optional: when the user clicks a list item we
//could do something. However, we will choose
//to do nothing...
/*ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// This method is triggered if an item is click within our
// list. For our example we won't be using this, but
// it is useful to know in real life applications.
}
});*/
}
public class LoadWeeklyPrays extends AsyncTask<Void, Void, Boolean> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(WeeklyPrays.this);
pDialog.setMessage("Loading weekly prays...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected Boolean doInBackground(Void... arg0) {
//we will develop this method in version 2
updateJSONdata();
return null;
}
@Override
protected void onPostExecute(Boolean result) {
super.onPostExecute(result);
pDialog.dismiss();
//we will develop this method in version 2
updateList();
}
}
}
这是logCat：
01-18 10:02:26.531: W/ApplicationPackageManager(3788): getCSCPackageItemText()
01-18 10:02:26.601: E/MoreInfoHPW_ViewGroup(3788): Parent view is not a TextView
01-18 10:02:26.801: D/OpenGLRenderer(3788): Enabling debug mode 0
01-18 10:02:34.531: W/ApplicationPackageManager(3788): getCSCPackageItemText()
01-18 10:02:34.546: E/MoreInfoHPW_ViewGroup(3788): Parent view is not a TextView
01-18 10:02:34.571: D/AbsListView(3788): Get MotionRecognitionManager
01-18 10:02:34.586: D/AbsListView(3788): Get MotionRecognitionManager
01-18 10:02:34.591: D/AndroidRuntime(3788): Shutting down VM
01-18 10:02:34.591: W/dalvikvm(3788): threadid=1: thread exiting with uncaught exception (group=0x41825c08)
01-18 10:02:34.596: E/AndroidRuntime(3788): FATAL EXCEPTION: main
01-18 10:02:34.596: E/AndroidRuntime(3788): Process: com.example.neotavraham, PID: 3788
01-18 10:02:34.596: E/AndroidRuntime(3788): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.neotavraham/com.example.neotavraham.WeeklyPrays}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
01-18 10:02:34.596: E/AndroidRuntime(3788): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2305)
01-18 10:02:34.596: E/AndroidRuntime(3788): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2363)
01-18 10:02:34.596: E/AndroidRuntime(3788): at android.app.ActivityThread.access$900(ActivityThread.java:161)
01-18 10:02:34.596: E/AndroidRuntime(3788): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1265)
01-18 10:02:34.596: E/AndroidRuntime(3788): at android.os.Handler.dispatchMessage(Handler.java:102)
01-18 10:02:34.596: E/AndroidRuntime(3788): at android.os.Looper.loop(Looper.java:157)
01-18 10:02:34.596: E/AndroidRuntime(3788): at android.app.ActivityThread.main(ActivityThread.java:5356)
01-18 10:02:34.596: E/AndroidRuntime(3788): at java.lang.reflect.Method.invokeNative(Native Method)
01-18 10:02:34.596: E/AndroidRuntime(3788): at java.lang.reflect.Method.invoke(Method.java:515)
01-18 10:02:34.596: E/AndroidRuntime(3788): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
01-18 10:02:34.596: E/AndroidRuntime(3788): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
01-18 10:02:34.596: E/AndroidRuntime(3788): at dalvik.system.NativeStart.main(Native Method)
01-18 10:02:34.596: E/AndroidRuntime(3788): Caused by: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
01-18 10:02:34.596: E/AndroidRuntime(3788): at android.app.ListActivity.onContentChanged(ListActivity.java:243)
01-18 10:02:34.596: E/AndroidRuntime(3788): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java)
01-18 10:02:34.596: E/AndroidRuntime(3788): at android.app.Activity.setContentView(Activity.java:2010)
01-18 10:02:34.596: E/AndroidRuntime(3788): at com.example.neotavraham.WeeklyPrays.onCreate(WeeklyPrays.java:68)
01-18 10:02:34.596: E/AndroidRuntime(3788): at android.app.Activity.performCreate(Activity.java:5426)
01-18 10:02:34.596: E/AndroidRuntime(3788): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
01-18 10:02:34.596: E/AndroidRuntime(3788): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2269)
01-18 10:02:34.596: E/AndroidRuntime(3788): ... 11 more
01-18 10:03:05.831: I/Process(3788): Sending signal. PID: 3788 SIG: 9
我可以看到它说：01-18 10:02:34.596: E/AndroidRuntime(3788): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.neotavraham/com.example.neotavraham.WeeklyPrays}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'但为什么？如何使用具有不同名称的列表视图？
在updateList()函数中我正在执行lv.setAdapter(adapter)但由于某种原因它无效。我有另一个活动，只有一个列表视图，所以我正在做lv = getListView()，它工作正常..但我不想在此活动中使用此功能......