我正在尝试使用ViewPager来显示文章。 首先，我有一个带有文章标题的ListView，当你点击其中一个时，你可以登陆ViewPager，在那里你可以通过滑动看到上一篇或下一篇文章。
但是我无法摆脱ArrayIndexOutOfBoundsException ......并且堆栈跟踪不是很有用。
这是我的主页（您可以在其中找到包含可点击文章标题的ListView）
public class HomepageActivity extends MenuActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.homepage);
actionBarTitle.setVisibility(View.INVISIBLE);
actionBarMenuButton.setVisibility(View.VISIBLE);
actionBarAccountButton.setVisibility(View.VISIBLE);
ParallaxListView listView = (ParallaxListView) findViewById(R.id.list_view);
HomepageItemAdapter adapter = new HomepageItemAdapter(this, getLayoutInflater());
LayoutInflater inflater = LayoutInflater.from(this);
RelativeLayout homepageParallaxHeader = (RelativeLayout) inflater.inflate(R.layout.homepage_parallax, null);
listView.addParallaxedHeaderView(homepageParallaxHeader);
listView.setAdapter(adapter);
DatabaseHelper db = new DatabaseHelper(getApplicationContext());
final List<ExternalContent> articles = db.getAllArticles();
adapter.updateData(articles);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent intent = new Intent(HomepageActivity.this, ExternalContentPagerActivity.class);
intent.putExtra("external_content_id", id);
intent.putExtra("external_contents", (Serializable) articles);
startActivity(intent);
}
});
}
}
这是ViewPager活动
public class ExternalContentPagerActivity extends FragmentActivity {
// When requested, this adapter returns a DemoObjectFragment,
// representing an object in the collection.
ExternalContentPagerAdapter externalContentPagerAdapter;
ViewPager mViewPager;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.external_content_view_pager);
// ViewPager and its adapters use support library
// fragments, so use getSupportFragmentManager.
List<ExternalContent> externalContents = (List<ExternalContent>) getIntent().getSerializableExtra("external_contents");
Long externalContentId = getIntent().getLongExtra("external_content_id", 0);
externalContentPagerAdapter = new ExternalContentPagerAdapter(getSupportFragmentManager(), externalContents, externalContentId);
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(externalContentPagerAdapter);
mViewPager.setCurrentItem(externalContentId.intValue());
}
}
适配器：
public class ExternalContentPagerAdapter extends FragmentStatePagerAdapter {
private final List<ExternalContent> externalContents;
private final Long externalContentId;
public ExternalContentPagerAdapter(FragmentManager supportFragmentManager, List<ExternalContent> externalContents, Long externalContentId) {
super(supportFragmentManager);
this.externalContents = externalContents;
this.externalContentId = externalContentId;
}
@Override
public Fragment getItem(int i) {
Fragment fragment = new ExternalContentPagerFragment();
Bundle args = new Bundle();
// Our object is just an integer :-P
args.putSerializable(ExternalContentPagerFragment.EXTERNAL_CONTENT, externalContents.get(i));
fragment.setArguments(args);
return fragment;
}
@Override
public int getCount() {
return externalContents != null ? externalContents.size() : 0;
}
}
页面片段：
public class ExternalContentPagerFragment extends Fragment {
public static final String EXTERNAL_CONTENT = "external_content";
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.external_content, container, false);
Bundle args = getArguments();
ExternalContent externalContent = (ExternalContent) args.getSerializable(EXTERNAL_CONTENT);
ImageView image = (ImageView) rootView.findViewById(R.id.image);
TextView title = (TextView) rootView.findViewById(R.id.title);
TextView content = (TextView) rootView.findViewById(R.id.content);
Picasso.with(getActivity()).load(externalContent.pictureUrl).into(image);
title.setText(externalContent.title);
content.setText(Html.fromHtml(externalContent.content));
return rootView;
}
}
这是没有帮助的堆栈跟踪...
12-02 16:08:26.200 3059-3059/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.ArrayIndexOutOfBoundsException: length=2036; index=2036
at android.text.MeasuredText.addStyleRun(MeasuredText.java:170)
at android.text.MeasuredText.addStyleRun(MeasuredText.java:204)
at android.text.StaticLayout.generate(StaticLayout.java:281)
at android.text.StaticLayout.<init>(StaticLayout.java:140)
at android.text.StaticLayout.<init>(StaticLayout.java:80)
at android.text.StaticLayout.<init>(StaticLayout.java:59)
at android.widget.TextView.makeSingleLayout(TextView.java:5901)
at android.widget.TextView.makeNewLayout(TextView.java:5741)
at android.widget.TextView.onMeasure(TextView.java:6098)
at android.view.View.measure(View.java:15172)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:617)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:399)
at android.view.View.measure(View.java:15172)
at android.widget.ScrollView.measureChildWithMargins(ScrollView.java:1196)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.widget.ScrollView.onMeasure(ScrollView.java:318)
at android.view.View.measure(View.java:15172)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4814)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:15172)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1456)
at android.view.View.measure(View.java:15172)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4814)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:15172)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:833)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:574)
at android.view.View.measure(View.java:15172)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4814)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2148)
at android.view.View.measure(View.java:15172)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1848)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1100)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1273)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:998)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4212)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
at android.view.Choreographer.doCallbacks(Choreographer.java:555)
at android.view.Choreographer.doFrame(Choreographer.java:525)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
我在这些课程中使用了调试器停止点，但我找不到任何东西...... 谢谢！