我想要实现一个ListView动画，左边是ImageView，右边是文本，我使用的是一个为ListView提供动画的适配器，它们非常棒，所以我想知道如何修改类，特别是适配器在左侧显示带有ImageView的ListView。这是班级：
public class Post extends SherlockActivity implements
PullToRefreshAttacher.OnRefreshListener, OnItemLongClickListener,
OnItemClickListener {
private PullToRefreshAttacher mPullToRefreshAttacher;
private ListView listview;
private DisplayMetrics metrics;
ActionMode mMode;
Animation animation;
Intent i;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
sessionCheck();
}
private void sessionCheck() {
// TODO Auto-generated method stub
Session session = Session.getActiveSession();
if (session != null && session.isOpened()) {
// Get the user's data
listview = new ListView(this);
listview.setFadingEdgeLength(0);
ArrayList<String> strings = new ArrayList<String>();
for (int i = 0; i < 100; i++) {
strings.add("That's list number " + (i + 1));
}
MainAdapter mAdapter = new MainAdapter(this, strings, metrics);
listview.setAdapter(mAdapter);
listview.setOnItemLongClickListener(this);
listview.setOnItemClickListener(this);
setContentView(listview);
pullToRefresh();
} else {
Toast.makeText(getApplicationContext(), "Please log in first",
Toast.LENGTH_LONG).show();
i = new Intent(getApplicationContext(), StartBase.class);
startActivity(i);
}
}
private void pullToRefresh() {
// TODO Auto-generated method stub
PullToRefreshAttacher.Options ptrOptions = new PullToRefreshAttacher.Options();
ptrOptions.refreshScrollDistance = 0.6f;
ptrOptions.headerLayout = R.layout.customised_header;
ptrOptions.headerTransformer = new CustomisedHeaderTransformer();
mPullToRefreshAttacher = PullToRefreshAttacher.get(this, ptrOptions);
PullToRefreshAttacher.ViewDelegate handler = new AbsListViewDelegate();
mPullToRefreshAttacher.addRefreshableView(listview, handler, this);
}
@Override
public void onRefreshStarted(View view) {
new AsyncTask<Void, Void, Void>() {
@Override
protected Void doInBackground(Void... params) {
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Notify PullToRefreshAttacher that the refresh has finished
mPullToRefreshAttacher.setRefreshComplete();
}
}.execute();
}
static class CustomisedHeaderTransformer extends
PullToRefreshAttacher.HeaderTransformer {
private View mHeaderView;
private TextView mMainTextView;
private TextView mProgressTextView;
@Override
public void onViewCreated(Activity activity, View headerView) {
mHeaderView = headerView;
mMainTextView = (TextView) headerView.findViewById(R.id.ptr_text);
mProgressTextView = (TextView) headerView
.findViewById(R.id.ptr_text_secondary);
}
@Override
public void onReset() {
mMainTextView.setVisibility(View.VISIBLE);
mMainTextView.setText(R.string.pull_to_refresh_pull_label);
mProgressTextView.setVisibility(View.GONE);
mProgressTextView.setText("");
}
@Override
public void onPulled(float percentagePulled) {
mProgressTextView.setVisibility(View.VISIBLE);
mProgressTextView
.setText(Math.round(100f * percentagePulled) + "%");
}
@Override
public void onRefreshStarted() {
mMainTextView.setText(R.string.pull_to_refresh_refreshing_label);
mProgressTextView.setVisibility(View.GONE);
}
@Override
public void onReleaseToRefresh() {
mMainTextView.setText(R.string.pull_to_refresh_release_label);
}
@Override
public void onRefreshMinimized() {
// In this header transformer, we will ignore this call
}
@Override
public boolean showHeaderView() {
final boolean changeVis = mHeaderView.getVisibility() != View.VISIBLE;
if (changeVis) {
mHeaderView.setVisibility(View.VISIBLE);
}
return changeVis;
}
@Override
public boolean hideHeaderView() {
final boolean changeVis = mHeaderView.getVisibility() != View.GONE;
if (changeVis) {
mHeaderView.setVisibility(View.GONE);
}
return changeVis;
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getSupportMenuInflater();
inflater.inflate(R.menu.main, menu);
SubMenu subMenu1 = menu.addSubMenu("Categories");
subMenu1.add(0, 1, Menu.NONE, "One");
subMenu1.add(0, 2, Menu.NONE, "Two");
subMenu1.add(0, 3, Menu.NONE, "Three");
subMenu1.add(0, 4, Menu.NONE, "Four");
subMenu1.add(0, 5, Menu.NONE, "Five");
subMenu1.add(0, 6, Menu.NONE, "Six");
MenuItem subMenu1Item = subMenu1.getItem();
subMenu1Item.setIcon(android.R.drawable.ic_dialog_info);
subMenu1Item.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS
| MenuItem.SHOW_AS_ACTION_WITH_TEXT);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case 1:
Toast.makeText(getApplicationContext(), "That's selected",
Toast.LENGTH_LONG).show();
break;
case 2:
Toast.makeText(getApplicationContext(), "That's selected",
Toast.LENGTH_LONG).show();
break;
case 3:
Toast.makeText(getApplicationContext(), "That's selected",
Toast.LENGTH_LONG).show();
break;
case 4:
Toast.makeText(getApplicationContext(), "That's selected",
Toast.LENGTH_LONG).show();
break;
case 5:
Toast.makeText(getApplicationContext(), "That's selected",
Toast.LENGTH_LONG).show();
break;
case 6:
Toast.makeText(getApplicationContext(), "That's selected",
Toast.LENGTH_LONG).show();
break;
case R.id.action_account:
i = new Intent(getApplicationContext(), Account.class);
startActivity(i);
break;
case R.id.action_logout:
Toast.makeText(getApplicationContext(), "Working on this...",
Toast.LENGTH_LONG).show();
break;
}
return super.onOptionsItemSelected(item);
}
public class MainAdapter extends ArrayAdapter<String> {
private Context context;
private LayoutInflater mInflater;
private ArrayList<String> strings;
private DisplayMetrics metrics_;
private class Holder {
public TextView textview;
}
public MainAdapter(Context context, ArrayList<String> strings,
DisplayMetrics metrics) {
super(context, 0, strings);
this.context = context;
this.mInflater = (LayoutInflater) this.context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
this.strings = strings;
this.metrics_ = metrics;
}
@Override
public View getView(final int position, View convertView,
ViewGroup parent) {
final String str = this.strings.get(position);
final Holder holder;
if (convertView == null) {
convertView = mInflater.inflate(
android.R.layout.simple_list_item_1, null);
convertView.setBackgroundColor(0xFF202020);
holder = new Holder();
holder.textview = (TextView) convertView
.findViewById(android.R.id.text1);
holder.textview.setTextColor(0xFFFFFFFF);
holder.textview.setBackgroundResource(R.drawable.list_selector);
convertView.setTag(holder);
} else {
holder = (Holder) convertView.getTag();
}
holder.textview.setText(str);
animation = animation = AnimationUtils.loadAnimation(context,
R.anim.push_left_in);
animation.setDuration(200);
convertView.startAnimation(animation);
animation = null;
return convertView;
}
}
private final class AnActionModeOfEpicProportions implements
ActionMode.Callback {
@Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
menu.add("One").setIcon(android.R.drawable.ic_dialog_info)
.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
menu.add("Two").setIcon(android.R.drawable.ic_dialog_info)
.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
menu.add("Three").setIcon(android.R.drawable.ic_dialog_info)
.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
menu.add("Four").setIcon(android.R.drawable.ic_dialog_info)
.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
menu.add("Five").setIcon(android.R.drawable.ic_dialog_info)
.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
menu.add("Six").setIcon(android.R.drawable.ic_dialog_info)
.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
return true;
}
@Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
return false;
}
@Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
Toast.makeText(getApplicationContext(), "Got click: " + item,
Toast.LENGTH_SHORT).show();
mode.finish();
return true;
}
@Override
public void onDestroyActionMode(ActionMode mode) {
}
}
@Override
public boolean onItemLongClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
mMode = startActionMode(new AnActionModeOfEpicProportions());
return false;
}
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), "List item selected",
Toast.LENGTH_LONG).show();
}
}
我只是复制粘贴的所有内容:-)您正在寻找的适配器是MainAdapter ......在那里。请帮帮我。
答案 0 :(得分：0)
您应该修改此部分：
if (convertView == null) {
convertView = mInflater.inflate(android.R.layout.simple_list_item_1, null);
convertView.setBackgroundColor(0xFF202020);
holder = new Holder();
holder.textview = (TextView) convertView.findViewById(android.R.id.text1);
holder.textview.setTextColor(0xFFFFFFFF);
holder.textview.setBackgroundResource(R.drawable.list_selector);
convertView.setTag(holder);
} else {
holder = (Holder) convertView.getTag();
}
因此，android.R.layout.simple_list_item_1是用于列表项的布局。它只包含一个TextView。要添加ImageView，您应该使用自定义列表项布局，例如：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:minHeight="?android:attr/listPreferredItemHeight">
<ImageView
android:id="@+id/pic"
android:layout_width="48dp"
android:layout_height="48dp"
android:src="@drawable/your_custom_image"
android:scaleType="centerCrop"/>
<TextView
android:id="@+id/text"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_marginLeft="8dp"/>
</LinearLayout>
将其放入res\layout目录的XML文件中，并将其命名为custom_list_item.xml。然后，在代码中将android.R.layout.simple_list_item_1替换为R.layout.custom_list_item，将android.R.id.text1替换为R.id.text。
多数民众赞成！动画保持不变。
如果您想更改每个列表项的图像，那么您还应该：
ImageView imageView字段添加到Holder类添加
holder.imageView = (ImageView) convertView.findViewById(R.id.pic);
后
holder.textview.setBackgroundResource(R.drawable.list_selector);
添加
holder.imageView.setImage(R.drawable.my_drawable);
后
holder.textview.setText(str);
如果需要，将R.drawable.my_drawable更改为您的自定义绘图。