首先，我很抱歉我的英语不好。请原谅我。 ：）..
我尝试制作一个自定义listView，其中包含ImageView，TextViews和Button。 因此，我想在listview中单击ImageView并从库中选择图像后更改图像。但是......对我来说真的很难。
在我的代码（customAdapter）中，Adapter类不是Activity，所以它不能直接调用startActivityForResult。所以我创建了新的Activity（它是GalleryImage.java）。并使用该类调用startActivity。但它没有用。我该怎么办......
（ImageView.setOnClickListner，PhoneBookAdapter的getView出现错误）
CustomAdapter源代码
//..skip import
public class PhoneBookAdapter extends BaseAdapter implements Filterable {
ArrayList<Contact> m_people = new ArrayList<Contact>();
ArrayList<Contact> m_filteredPeople = new ArrayList<Contact>();
private ItemFilter mFilter = new ItemFilter();
private class CustomHolder {
ImageView m_photo;
TextView m_name, m_phone;
Button m_call, m_reserve;
}
public PhoneBookAdapter(ArrayList<Contact> people) {
m_people = people;
m_filteredPeople = people;
}
@Override
public int getCount() {
return m_filteredPeople.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// final int pos = position;
final Context context = parent.getContext();
final TextView phone;
final ImageView photo;
TextView name;
Button call, reserve;
final int pos = position;
CustomHolder holder = null;
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.phonebook_list_item, parent,
false);
photo = (ImageView) convertView.findViewById(R.id.iv_photo);
name = (TextView) convertView.findViewById(R.id.tv_name);
phone = (TextView) convertView.findViewById(R.id.tv_phonenumber);
call = (Button) convertView.findViewById(R.id.btn_call);
reserve = (Button) convertView.findViewById(R.id.btn_reserve);
holder = new CustomHolder();
holder.m_photo = photo;
holder.m_name = name;
holder.m_phone = phone;
holder.m_call = call;
holder.m_reserve = reserve;
convertView.setTag(holder);
} else {
holder = (CustomHolder) convertView.getTag();
photo = holder.m_photo;
name = holder.m_name;
phone = holder.m_phone;
call = holder.m_call;
reserve = holder.m_reserve;
}
//photo.setImageResource(m_filteredPeople.get(position).getImage());
name.setText(m_filteredPeople.get(position).getName());
phone.setText(m_filteredPeople.get(position).getNumber());
photo.setOnClickListener(new OnClickListener() {
Activity activity;
int SELECT_IMAGE=90;
@Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_PICK);
intent.setType(android.provider.MediaStore.Images.Media.CONTENT_TYPE);
intent.setData(android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
GalleryImage gallery = new GalleryImage(SELECT_IMAGE, photo);
gallery.startActivityForResult(intent, SELECT_IMAGE);
}
});
call.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO make real phone call
Toast.makeText(context, "call " + phone.getText(),
Toast.LENGTH_SHORT).show();
Intent intent = new Intent(Intent.ACTION_CALL, Uri
.parse("tel:" + m_filteredPeople.get(pos).getNumber()));
context.startActivity(intent);
}
});
reserve.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(context, "reserve " + phone.getText(),
Toast.LENGTH_SHORT).show();
}
});
return convertView;
}
@Override
public Filter getFilter() {
return mFilter;
}
private class ItemFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
String filterString = constraint.toString();
FilterResults results = new FilterResults();
final ArrayList<Contact> m_IFpeople = m_people;
int count = m_IFpeople.size();
final ArrayList<Contact> n_people = new ArrayList<Contact>();
String filterableString;
if (filterString != null
&& filterString.trim().equalsIgnoreCase("") != true) {
// Whitespace와 null 제거
// for (int i = 0; i < count; i++) {
// filterableString = m_IFpeople.get(i).getName();
// if (filterableString.indexOf(filterString) >= 0) {
// n_people.add(m_IFpeople.get(i));
// }
// }
for (int i = 0; i < count; i++) {
filterableString = HangulUtils.getHangulInitialSound(
m_IFpeople.get(i).getName(), filterString);
if (filterableString.indexOf(filterString) >= 0) {
n_people.add(m_IFpeople.get(i));
}
}
results.values = n_people;
results.count = n_people.size();
} else {
results.values = m_IFpeople;
results.count = m_IFpeople.size();
}
return results;
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
m_filteredPeople = (ArrayList<Contact>) results.values;
notifyDataSetChanged();
}
}
}
GalleryImage.java（新活动）
//..skip import
public class GalleryImage extends Activity {
final int REQ_CODE_SELECT_IMAGE;
ImageView photo;
public GalleryImage(int codeImage, ImageView m_photo) {
REQ_CODE_SELECT_IMAGE = codeImage;
photo = m_photo;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Intent intent = new Intent(Intent.ACTION_PICK);
// intent.setType(android.provider.MediaStore.Images.Media.CONTENT_TYPE);
// intent.setData(
// android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
// startActivityForResult(intent, REQ_CODE_SELECT_IMAGE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQ_CODE_SELECT_IMAGE && resultCode == Activity.RESULT_OK
&& data != null) {
final Uri selectImageUri = data.getData();
final String[] filePathColumn = { MediaStore.Images.Media.DATA };
final Cursor imageCursor = this.getContentResolver()
.query(selectImageUri, filePathColumn, null, null, null);
final int columnIndex = imageCursor.getColumnIndex(filePathColumn[0]);
final String imagePath = imageCursor.getString(columnIndex);
imageCursor.close();
final Bitmap bitmap = BitmapFactory.decodeFile(imagePath);
}
}
}
感谢您的帮助。 ：d
答案 0 :(得分：0)
此处的解决方案不是创建Activity的新实例，而是能够访问Android Framework创建的现有实例。应用程序员永远不应该创建Activity的实例。
最佳方法是将Activity类型的参数添加到PhoneBookAdapter的构造函数中。如：
private Activity activity;
public PhoneBookAdapter(Activity activity, ArrayList<Contact> people) {
this.activity = activity;
m_people = people;
m_filteredPeople = people;
}
您可以在此activity.startActivityForResult的实例上致电Activity。
然后在创建适配器时传入Activity的实例。在Activity中，您只需传递此内容，在Fragment中，您可以通过调用getActivity()类的Fragment方法来获取实例。
至于处理已启动Activity的结果，您需要在显示列表的Activity或Fragment中实现此功能。