我正在从gridviewadapter向片段发送arraylist，但数据未显示。在将arraylist发送到活动时gridview代码正在工作，所以问题在于片段
这是网格视图适配器
@Override
public View getView(int position, View convertView, ViewGroup parent) {
System.out.println("entering adapter1");
View row = convertView;
final ViewHolder holder;
if (row == null) {
LayoutInflater inflater = LayoutInflater.from(mcontext);
row = inflater.inflate(layoutResourceId, parent, false);
holder = new ViewHolder();
holder.imageTitle = (TextView) row.findViewById(R.id.text);
holder.imageView = (ImageView) row.findViewById(R.id.imageView);
row.setTag(holder);
} else {
holder = (ViewHolder) row.getTag();
}
final Listitem item = getItem(position);
System.out.println("item.getUrl() ");
System.out.println(item.getUrl());
Picasso.with(mcontext).setIndicatorsEnabled(true);
holder.imageTitle.setText(item.getId());
/* Picasso.
with(mcontext).
load(item.getUrl())
.placeholder(R.drawable.logo)
.fit()
.noFade()
.into(holder.imageView)
;*/
//int maxSize = 4 * 1024 * 1024; // 4MiB
//Picasso myNewPicasso = new Picasso.Builder(mcontext).memoryCache(new LruCache(maxSize)).build();
Picasso.with(mcontext)
.load(item.getUrl())
.placeholder(R.drawable.logo)
.fit()
.noFade()
.into(holder.imageView);
holder.imageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
ArrayList<Listitem> personArrayList = new ArrayList<>();
personArrayList.add(new Listitem(item.getId(), item.getUrl()));
Intent intent = new Intent(mcontext,SingleViewActivity.class);
intent.putExtra("Person_List", personArrayList);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
mcontext.startActivity(intent);
Log.d("OnImageButton", "Clicked");
}
});
return row;
}
static class ViewHolder {
TextView imageTitle;
ImageView imageView;
}
这是包含视图寻呼机的片段
public class SingleViewActivity extends FragmentActivity {
ImageView imageView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_page_view);
DemoCollectionPagerAdapter mDemoCollectionPagerAdapter = new DemoCollectionPagerAdapter( getSupportFragmentManager());
ViewPager mViewPager = (ViewPager) findViewById(R.id.pager);
imageView = (ImageView) findViewById(R.id.funnyimage);
Bundle bundle = getIntent().getExtras();
Log.d("s","singleview");
mViewPager.setAdapter(mDemoCollectionPagerAdapter);
}
/* if (savedInstanceState == null) {
// During initial setup, plug in the details fragment.
MyFragment myrag = new MyFragment();
myrag.setArguments(getIntent().getExtras());
getSupportFragmentManager().beginTransaction().add(android.R.id.content, myrag).commit();
}
*/
// Since this is an object collection, use a FragmentStatePagerAdapter,
// and NOT a FragmentPagerAdapter.
public class DemoCollectionPagerAdapter extends FragmentStatePagerAdapter {
public DemoCollectionPagerAdapter(FragmentManager fm) {
super(fm);
Log.d("s","adapterview");
}
@Override
public Fragment getItem(int i) {
Fragment fragment = new DemoObjectFragment();
Bundle args = new Bundle();
// Our object is just an integer :-P
args.putInt(DemoObjectFragment.ARG_OBJECT, i + 1);
fragment.setArguments(args);
return fragment;
}
@Override
public int getCount() {
return 100;
}
@Override
public CharSequence getPageTitle(int position) {
return "OBJECT " + (position + 1);
}
}
// Instances of this class are fragments representing a single
// object in our collection.
public static class DemoObjectFragment extends Fragment {
public static final String ARG_OBJECT = "object";
ImageView imageView;
int imageResourceId;
int numberSelected;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//change to avoid orientation crash
Log.d("s","fragview");
}
public static Fragment newInstance(Context context,ArrayList<Listitem> personArrayList, int numberSelected) {
DemoObjectFragment f = new DemoObjectFragment();
Bundle args= new Bundle();
args.putParcelableArrayList("Person_List", personArrayList);
//args.putInt("",imageResourceId);
f.setArguments(args);
return f;
}
@Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
// The last two arguments ensure LayoutParams are inflated
// properly.
View rootView = inflater.inflate(
R.layout.fragment_collection_object, container, false);
// Bundle args = getArguments();
// ((TextView) rootView.findViewById(R.id.text1)).setText(Integer.toString(args.getInt(ARG_OBJECT)));
Bundle args= new Bundle();
ArrayList<Listitem> personArrayList = args.getParcelableArrayList("Person_List");
System.out.print(personArrayList);
System.out.print("here1");
if (personArrayList != null && !personArrayList.isEmpty()) {
for (Listitem person : personArrayList) {
Picasso.
with(getActivity()).
load(person.url)
.placeholder(R.drawable.logo)
.fit()
.noFade()
.into(imageView);
Log.i("PersonsActivity",String.valueOf(person.url));
}
}
return rootView;
}
}
}
对我正在做什么的一点解释 在我的主要活动中，我有一个图像的网格视图，当我点击一个图像时，我得到单个图像 - 点击一个新活动。我使用parcelable arraylist将数据从gridview发送到singleview acitivity。它正在为这项活动而努力。但是当我实现了viewpager和片段和片段适配器时，没有显示我不知道为什么，
这是我的logcat，因为您注意到它没有继续进行其余操作，因此在我的代码中添加了log print。
01-11 20:54:40.814 3323-3323/com.justedhak.www.i D/Activity: performCreate Call secproduct feature valuefalse
01-11 20:54:40.814 3323-3323/com.justedhak.www.i D/Activity: performCreate Call debug elastic valuetrue
01-11 20:54:40.829 3323-3323/com.justedhak.www.i D/s: fragview
01-11 20:54:40.839 3323-3323/com.justedhak.www.i D/s: fragview
01-11 20:54:40.954 3323-3323/? I/Timeline: Timeline: Activity_idle id: android.os.BinderProxy@211f949f time:9248062
这是Singleviewactivity.java中片段代码的一部分
public static class DemoObjectFragment extends Fragment {
public static final String ARG_OBJECT = "object";
ImageView imageView;
int imageResourceId;
int numberSelected;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//change to avoid orientation crash
Log.d("s","fragview");
}
public static Fragment newInstance(Context context,ArrayList<Listitem> personArrayList, int numberSelected) {
DemoObjectFragment f = new DemoObjectFragment();
Bundle args= new Bundle();
args.putParcelableArrayList("Person_List", personArrayList);
//args.putInt("",imageResourceId);
f.setArguments(args);
return f;
}
@Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
// The last two arguments ensure LayoutParams are inflated
// properly.
View rootView = inflater.inflate(
R.layout.fragment_collection_object, container, false);
// Bundle args = getArguments();
// ((TextView) rootView.findViewById(R.id.text1)).setText(Integer.toString(args.getInt(ARG_OBJECT)));
Bundle args= new Bundle();
ArrayList<Listitem> personArrayList = args.getParcelableArrayList("Person_List");
System.out.print(personArrayList);
System.out.print("here1");
if (personArrayList != null && !personArrayList.isEmpty()) {
for (Listitem person : personArrayList) {
Picasso.
with(getActivity()).
load(person.url)
.placeholder(R.drawable.logo)
.fit()
.noFade()
.into(imageView);
Log.i("PersonsActivity",String.valueOf(person.url));
}
}
return rootView;
}
}
}
答案 0 :(得分：1)
Moudiz，
您需要更改DemoCollectionPagerAdapter构造函数以接受人员的ArrayList：
DemoCollectionPagerAdapter(FragmentManager fm, ArrayList<Listitem> personArrayList)
使用新构造函数时，请确保在首次在SinglePageActivity View中创建它时将其传递给适配器对象。
public class SingleViewActivity extends FragmentActivity {
ImageView imageView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_page_view);
Bundle bundle = getIntent().getExtras();
ArrayList<Listitem> personList = getIntent().getParcelableArrayListExtra("Person_List");
// Pass it here using your new constructor.
DemoCollectionPagerAdapter mDemoCollectionPagerAdapter = new DemoCollectionPagerAdapter(getSupportFragmentManager(), personList);
ViewPager mViewPager = (ViewPager) findViewById(R.id.pager);
imageView = (ImageView) findViewById(R.id.funnyimage);
Log.d("s","singleview");
mViewPager.setAdapter(mDemoCollectionPagerAdapter);
}
下一部分是你要弄清楚的，因为在你在这里创建一个Fragment对象时传递你的ArrayList是相当令人困惑的：
public static Fragment newInstance(Context context,ArrayList<Listitem> personArrayList, int numberSelected) {
如果有帮助，请告诉我。