我收到运行时异常：
java.lang.ArrayIndexOutOfBoundsException：length = 1; index = 4 at com.sit.loco.frgment.VideoListFragment.onCreateView（VideoListFragment.java:110）
我在下面的编码中提到了第110行。
StackTrace：
08-25 04:55:10.808: E/AndroidRuntime(2402): FATAL EXCEPTION: main
08-25 04:55:10.808: E/AndroidRuntime(2402): Process: com.loco.android, PID: 2402
08-25 04:55:10.808: E/AndroidRuntime(2402): java.lang.ArrayIndexOutOfBoundsException: length=1; index=4
08-25 04:55:10.808: E/AndroidRuntime(2402): at com.sit.loco.frgment.VideoListFragment.onCreateView(VideoListFragment.java:110)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.support.v4.app.Fragment.performCreateView(Fragment.java:1500)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:938)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1115)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1478)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:478)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:141)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.support.v4.view.ViewPager.populate(ViewPager.java:1068)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.support.v4.view.ViewPager.populate(ViewPager.java:914)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1436)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.view.View.measure(View.java:16497)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:719)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:455)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.view.View.measure(View.java:16497)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.view.View.measure(View.java:16497)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
08-25 04:55:10.808: E/AndroidRuntime(2402): at com.android.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:327)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.view.View.measure(View.java:16497)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
08-25 04:55:10.808: E/AndroidRuntime(2402): at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2291)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.view.View.measure(View.java:16497)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1916)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1113)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1295)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1000)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5670)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.view.Choreographer.doCallbacks(Choreographer.java:574)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.view.Choreographer.doFrame(Choreographer.java:544)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.os.Handler.handleCallback(Handler.java:733)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.os.Handler.dispatchMessage(Handler.java:95)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.os.Looper.loop(Looper.java:136)
08-25 04:55:10.808: E/AndroidRuntime(2402): at android.app.ActivityThread.main(ActivityThread.java:5017)
08-25 04:55:10.808: E/AndroidRuntime(2402): at java.lang.reflect.Method.invokeNative(Native Method)
08-25 04:55:10.808: E/AndroidRuntime(2402): at java.lang.reflect.Method.invoke(Method.java:515)
08-25 04:55:10.808: E/AndroidRuntime(2402): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
08-25 04:55:10.808: E/AndroidRuntime(2402): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
08-25 04:55:10.808: E/AndroidRuntime(2402): at dalvik.system.NativeStart.main(Native Method)
VideoListFragment.java：
package com.sit.loco.frgment;
import android.support.v4.app.Fragment;
public class VideoListFragment extends Fragment {
OnVideoSelectedListener mCallback;
boolean loadingMore = false;
// create string variables
String YOUTUBE_USERNAME = "";
private String YOUTUBE_API = "http://gdata.youtube.com/feeds/api/users/"+YOUTUBE_USERNAME+"/uploads?alt=jsonc" +
"&v=2"+
"&start-index=1"+
"&max-results=10";
// create object of views
ListView list;
ProgressBar prgLoading;
Button btnRefresh;
Button btnLoadMore;
// create variable to get position, connection status, resources, and channel username
int position;
boolean isConnect = true;
Resources res;
String[] ChannelUsername;
// create object of custom adapter
VideoListAdapter vla;
// create arraylist variables
ArrayList<HashMap<String, String>> menuItems;
ProgressDialog pDialog;
// flag for current page
int current_page = 1;
int previous_page;
static final String KEY_ID = "id";
static final String KEY_TITLE = "title";
static final String KEY_THUMBNAIL = "thumbnail";
static final String KEY_DURATION = "duration";
// create interface listener
public interface OnVideoSelectedListener{
public void onVideoSelected(String ID);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
View view = inflater.inflate(R.layout.fragment_list, container, false);
list = (ListView)view .findViewById(R.id.list);
btnRefresh = (Button)view .findViewById(R.id.btnRefresh);
menuItems = new ArrayList<HashMap<String, String>>();
// get value that passed from previous page
Bundle bundle = getArguments();
position = bundle.getInt("position", 0);
// get channel username and put selected channel to youtube api
res = getActivity().getResources();
ChannelUsername = res.getStringArray(R.array.channel_username);
YOUTUBE_USERNAME = ChannelUsername[position];---->Error at Line 110
YOUTUBE_API = "http://gdata.youtube.com/feeds/api/users/"+YOUTUBE_USERNAME+"/uploads?alt=jsonc" +
"&v=2"+
"&start-index=1"+
"&max-results=10";
// create LoadMore button
btnLoadMore = new Button(getActivity());
btnLoadMore.setBackgroundResource(R.drawable.btn_default_holo_light);
btnLoadMore.setText(getString(R.string.load_more));
// adding load more button to lisview at bottom
list.addFooterView(btnLoadMore);
new loadFirstListView().execute();
// listener to handle load more buttton when clicked
btnLoadMore.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// Starting a new async task
isConnect = true;
new loadMoreListView().execute();
}
});
// listener to handle list when clicked
list.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position,
long arg3) {
// TODO Auto-generated method stub
HashMap<String, String> item = new HashMap<String, String>();
item = menuItems.get(position);
mCallback.onVideoSelected(item.get("id"));
list.setItemChecked(position, true);
}
});
// listener to handle refresh button when clicked
btnRefresh.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
isConnect = true;
new loadFirstListView().execute();
}
});
return view;
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
// This makes sure that the container activity has implemented
// the callback interface. If not, it throws an exception.
try {
mCallback = (OnVideoSelectedListener) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString()
+ " must implement OnHeadlineSelectedListener");
}
}
// load first 10 videos
private class loadFirstListView extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
// Showing progress dialog before sending http request
pDialog = new ProgressDialog(
getActivity());
pDialog.setMessage("Please wait..");
pDialog.setIndeterminate(true);
pDialog.setCancelable(false);
pDialog.show();
}
protected Void doInBackground(Void... unused) {
try {
HttpClient client = new DefaultHttpClient();
HttpConnectionParams.setConnectionTimeout(client.getParams(), 15000);
HttpConnectionParams.setSoTimeout(client.getParams(), 15000);
// Perform a GET request to YouTube for a JSON list of all the videos by a specific user
HttpUriRequest request = new HttpGet(YOUTUBE_API);
// Get the response that YouTube sends back
HttpResponse response = client.execute(request);
// Convert this response into an inputstream for the parser to use
InputStream atomInputStream = response.getEntity().getContent();
BufferedReader in = new BufferedReader(new InputStreamReader(atomInputStream));
//BufferedReader in = new BufferedReader(new InputStreamReader(tc.getInputStream()));
String line;
String str = "";
while ((line = in.readLine()) != null){
str += line;
}
JSONObject json = new JSONObject(str);
JSONObject dataObject = json.getJSONObject("data"); // this is the "data": { } part
JSONArray items = dataObject.getJSONArray("items"); // this is the "items: [ ] part
for (int i = 0; i < items.length(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
JSONObject youtubeObject = items.getJSONObject(i);
map.put(KEY_ID, youtubeObject.getString("id")); // id not using any where
map.put(KEY_TITLE, youtubeObject.getString("title"));
map.put(KEY_THUMBNAIL, youtubeObject.getJSONObject("thumbnail").getString("hqDefault"));
String duration = secondToTime(youtubeObject.getInt("duration"));
map.put(KEY_DURATION, duration);
// adding HashList to ArrayList
menuItems.add(map);
}
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
isConnect = false;
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return (null);
}
protected void onPostExecute(Void unused) {
// closing progress dialog
pDialog.dismiss();
if(isAdded()){
if(isConnect){
btnRefresh.setVisibility(View.GONE);
// Getting adapter
vla = new VideoListAdapter(getActivity(), menuItems);
list.setAdapter(vla);
}else{
btnRefresh.setVisibility(View.VISIBLE);
Toast.makeText(getActivity(), getString(R.string.no_connection), Toast.LENGTH_SHORT).show();
}
}
}
}
// load more videos
private class loadMoreListView extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
// Showing progress dialog before sending http request
pDialog = new ProgressDialog(
getActivity());
pDialog.setMessage("Please wait..");
pDialog.setIndeterminate(true);
pDialog.setCancelable(false);
pDialog.show();
}
protected Void doInBackground(Void... unused) {
// store previous value of current page
previous_page = current_page;
// increment current page
current_page += 10;
YOUTUBE_API = "http://gdata.youtube.com/feeds/api/users/"+YOUTUBE_USERNAME+"/uploads?alt=jsonc" +
"&v=2"+
"&start-index="+current_page+
"&max-results=10";
try {
HttpClient client = new DefaultHttpClient();
HttpConnectionParams.setConnectionTimeout(client.getParams(), 15000);
HttpConnectionParams.setSoTimeout(client.getParams(), 15000);
// Perform a GET request to YouTube for a JSON list of all the videos by a specific user
HttpUriRequest request = new HttpGet(YOUTUBE_API);
// Get the response that YouTube sends back
HttpResponse response = client.execute(request);
// Convert this response into an inputstream for the parser to use
InputStream atomInputStream = response.getEntity().getContent();
BufferedReader in = new BufferedReader(new InputStreamReader(atomInputStream));
//BufferedReader in = new BufferedReader(new InputStreamReader(tc.getInputStream()));
String line;
String str = "";
while ((line = in.readLine()) != null){
str += line;
}
JSONObject json = new JSONObject(str);
JSONObject dataObject = json.getJSONObject("data"); // this is the "data": { } part
JSONArray items = dataObject.getJSONArray("items"); // this is the "items: [ ] part
for (int i = 0; i < items.length(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
JSONObject youtubeObject = items.getJSONObject(i);
map.put(KEY_ID, youtubeObject.getString("id")); // id not using any where
map.put(KEY_TITLE, youtubeObject.getString("title"));
map.put(KEY_THUMBNAIL, youtubeObject.getJSONObject("thumbnail").getString("hqDefault"));
String duration = secondToTime(youtubeObject.getInt("duration"));
map.put(KEY_DURATION, duration);
// adding HashList to ArrayList
menuItems.add(map);
}
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
isConnect = false;
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return (null);
}
protected void onPostExecute(Void unused) {
// closing progress dialog
pDialog.dismiss();
if(isConnect){
// get listview current position - used to maintain scroll position
int currentPosition = list.getFirstVisiblePosition();
btnRefresh.setVisibility(View.GONE);
// Appending new data to menuItems ArrayList
vla = new VideoListAdapter(
getActivity(),
menuItems);
list.setAdapter(vla);
// Setting new scroll position
list.setSelectionFromTop(currentPosition + 1, 0);
}else{
if(menuItems != null){
current_page = previous_page;
btnRefresh.setVisibility(View.GONE);
}else{
btnRefresh.setVisibility(View.VISIBLE);
}
Toast.makeText(getActivity(), getString(R.string.no_connection), Toast.LENGTH_SHORT).show();
}
}
}
// method to convert second to hours, minutes, and seconds
String secondToTime(int duration){
String time = "";
String Hours = "";
String Minutes = "";
String Seconds = "";
double hours = 0.0;
double minutes = 0.0;
double seconds = 0.0;
DecimalFormat df = new DecimalFormat("#.####");
hours = duration / 3600;
minutes = (duration % 3600) /60;
seconds = duration % 60;
if((hours < 10) && (hours > 0)){
Hours = "0" + df.format(hours);
}else if(hours == 0){
Hours = "00";
}else{
Hours = df.format(hours);
}
if((minutes < 10) && (minutes > 0)){
Minutes = "0" + df.format(minutes);
}else if(minutes == 0){
Minutes = "00";
}else{
Minutes = df.format(minutes);
}
if((seconds < 10) && (seconds > 0)){
Seconds = "0" + df.format(seconds);
}else if(seconds == 0){
Seconds = "00";
}else{
Seconds = df.format(seconds);
}
time = Hours +":"+Minutes+":"+Seconds;
return time;
}
@Override
public void onDestroy() {
super.onDestroy();
vla.imageLoader.clearCache();
Log.d("clear cache", "clear cache");
}
}
的strings.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">Loco</string>
<string name="action_settings">Settings</string>
<string name="hello_world">Hello world!</string>
<string-array name="channel_name">
<item >The Loco</item>
</string-array>
<string-array name="channel_username">
<item >LOCOMEDIATVM</item>
</string-array>
</resources>
编辑：
HomeActivity.java：
package com.sit.loco.activity;
import com.loco.android.R;
import com.sit.loco.frgment.VideoListFragment;
public class HomeActivity extends FragmentActivity
implements ActionBar.OnNavigationListener, VideoListFragment.OnVideoSelectedListener{
// create object of ActionBar and VideoListFragment
ActionBar actionbar;
VideoListFragment videoListFrag;
int selectedItem;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
// add channel list array to actionbar spinner
Context context = getSupportActionBar().getThemedContext();
ArrayAdapter<CharSequence> list = ArrayAdapter.createFromResource(context, R.array.channel_name, R.layout.sherlock_spinner_item);
list.setDropDownViewResource(R.layout.sherlock_spinner_dropdown_item);
// remove actionbar title and add spinner to actionbar
getActionBar().setDisplayShowTitleEnabled(false);
getActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);
getActionBar().setListNavigationCallbacks(list, this);
}
@Override
public boolean onNavigationItemSelected(int itemPosition, long itemId) {
// TODO Auto-generated method stub
selectedItem = itemPosition;
// create object of VideoListFragment and send data position to that fragment
videoListFrag = new VideoListFragment();
Bundle bundle = new Bundle();
bundle.putInt("position", itemPosition);
videoListFrag.setArguments(bundle);
// call video list fragment with new data
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.content_frame, videoListFrag, "VIDEO_LIST_FRAGMENT")
.commit();
return true;
}
@Override
public void onVideoSelected(String ID) {
// call player page to play selected video
Intent i = new Intent(this, PlayerActivity.class);
i.putExtra("id", ID);
startActivity(i);
}
}
我不知道如何解决这个问题。任何人都可以帮助我。谢谢。
答案 0 :(得分：1)
您的上一页错误排名：
Bundle bundle = getArguments();
position = bundle.getInt("position", 0);
虽然您可以添加支票
ChannelUsername = res.getStringArray(R.array.channel_username);
if (position > ChannelUsername.length()-1) {
YOUTUBE_USERNAME = ChannelUsername[position];
}
你最好先弄清楚你为什么会在错误的位置发错。
答案 1 :(得分：0)
在VideoListFragment.java中：
我改变了这个
YOUTUBE_USERNAME = ChannelUsername [position]; ----＆gt;第110行的错误
到
YOUTUBE_USERNAME = ChannelUsername [0];
为什么我将此位置设置为0表示我只有一个通道user_name。