ListView
发布时间：2020-12-16 00:30:53 所属栏目：百科 来源：网络整理
导读：Listview:一个View来显示垂直滚动的的下拉列表。 android xml属性： android：divider:listiview中每个item之间的分隔线 可以设置color android：dividerHeight:分隔符的高度。 android：entries：引用一个将使用在此ListView里的数组。若数组是固定的，使用
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Listview:一个View来显示垂直滚动的的下拉列表。 android xml属性： android：divider:listiview中每个item之间的分隔线 可以设置color android：dividerHeight:分隔符的高度。 android：entries：引用一个将使用在此ListView里的数组。若数组是固定的，使用此属性将比在程序中写入更为简单。 android：footerdividersenabled:设成flase时，此ListView将不会在页脚视图前画分隔符。此属性缺省值为true。 android:headerDividersEnabled:设成flase时，此ListView将不会在页眉视图后画分隔符。此属性缺省值为true。 android:choicMode:none=0 表示无选择模式 / singlechoice=1 表示只能选择一项 / multipleChoice=2 表示可以多选
1 android and lists
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:padding="6dip" >
<ImageView
android:id="@+id/icon"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_alignParentBottom="true"
android:layout_alignParentTop="true"
android:layout_marginRight="6dip"
android:contentDescription="TODO"
android:src="@drawable/ic_launcher" />
<TextView
android:id="@+id/secondLine"
android:layout_width="fill_parent"
android:layout_height="26dip"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_toRightOf="@id/icon"
android:ellipsize="marquee"
android:singleLine="true"
android:text="Description"
android:textSize="12sp" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_above="@id/secondLine"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_alignWithParentIfMissing="true"
android:layout_toRightOf="@id/icon"
android:gravity="center_vertical"
android:text="Example application"
android:textSize="16sp" />
</RelativeLayout>
2.default arrayAdapter xml
<ListView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/listview"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
ListViewExampleActivity.calss public class ListViewExampleActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_listviewexampleactivity);
final ListView listview = (ListView) findViewById(R.id.listview);
String[] values = new String[] { "Android","iPhone","WindowsMobile","Blackberry","WebOS","Ubuntu","Windows7","Max OS X","Linux","OS/2","Android","WindowsMobile" };
final ArrayList<String> list = new ArrayList<String>();
for (int i = 0; i < values.length; ++i) {
list.add(values[i]);
}
final StableArrayAdapter adapter = new StableArrayAdapter(this,android.R.layout.simple_list_item_1,list);
listview.setAdapter(adapter);
listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent,final View view,int position,long id) {
final String item = (String) parent.getItemAtPosition(position);
view.animate().setDuration(2000).alpha(0)
.withEndAction(new Runnable() {
@Override
public void run() {
list.remove(item);
adapter.notifyDataSetChanged();
view.setAlpha(1);
}
});
}
});
}
private class StableArrayAdapter extends ArrayAdapter<String> {
HashMap<String,Integer> mIdMap = new HashMap<String,Integer>();
public StableArrayAdapter(Context context,int textViewResourceId,List<String> objects) {
super(context,textViewResourceId,objects);
for (int i = 0; i < objects.size(); ++i) {
mIdMap.put(objects.get(i),i);
}
}
@Override
public long getItemId(int position) {
String item = getItem(position);
return mIdMap.get(item);
}
@Override
public boolean hasStableIds() {
return true;
}
}
}
3.自定义的adapter
note：此布局增压泵服务可以通过访问getLayoutInflator()方法的活动或通过context.getSystemService(Context.LAYOUT_INFLATER_SERVICE)方法调用。 public class MySimpleArrayAdapter extends ArrayAdapter<String> {
private final Context context;
private final String[] values;
public MySimpleArrayAdapter(Context context,String[] values) {
super(context,R.layout.rowlayout,values);
this.context = context;
this.values = values;
}
@Override
public View getView(int position,View convertView,ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView = inflater.inflate(R.layout.rowlayout,parent,false);
TextView textView = (TextView) rowView.findViewById(R.id.label);
ImageView imageView = (ImageView) rowView.findViewById(R.id.icon);
textView.setText(values[position]);
// change the icon for Windows and iPhone
String s = values[position];
if (s.startsWith("iPhone")) {
imageView.setImageResource(R.drawable.no);
} else {
imageView.setImageResource(R.drawable.ok);
}
return rowView;
}
}
4.listactivity and listFragment public class MyListFragment extends ListFragment {
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
String[] values = new String[] { "Android","OS/2" };
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(),values);
setListAdapter(adapter);
}
@Override
public void onListItemClick(ListView l,View v,long id) {
// do something with the data
}
}
public class MyListActivity extends ListActivity {
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
String[] values = new String[] { "Android","OS/2" };
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,values);
setListAdapter(adapter);
}
}
5.ListView and ListActivity public class MyListActivity extends ListActivity {
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
String[] values = new String[] { "Android",values);
setListAdapter(adapter);
}
@Override
protected void onListItemClick(ListView l,long id) {
String item = (String) getListAdapter().getItem(position);
Toast.makeText(this,item + " selected",Toast.LENGTH_LONG).show();
}
}
6.listActivity 自己的Layout xml <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<ImageView
android:id="@+id/icon"
android:layout_width="22px"
android:layout_height="22px"
android:layout_marginLeft="4px"
android:layout_marginRight="10px"
android:layout_marginTop="4px"
android:src="@drawable/ic_launcher" >
</ImageView>
<TextView
android:id="@+id/label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@+id/label"
android:textSize="20px" >
</TextView>
</LinearLayout>
public class MyListActivity extends ListActivity {
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
String[] values = new String[] { "Android","OS/2" };
// use your custom layout
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,R.id.label,values);
setListAdapter(adapter);
}
@Override
protected void onListItemClick(ListView l,Toast.LENGTH_LONG).show();
}
}
7.实现自己的适配器 public class MySimpleArrayAdapter extends ArrayAdapter<String> {
private final Context context;
private final String[] values;
public MySimpleArrayAdapter(Context context,values);
this.context = context;
this.values = values;
}
@Override
public View getView(int position,false);
TextView textView = (TextView) rowView.findViewById(R.id.label);
ImageView imageView = (ImageView) rowView.findViewById(R.id.icon);
textView.setText(values[position]);
// Change the icon for Windows and iPhone
String s = values[position];
if (s.startsWith("Windows7") || s.startsWith("iPhone")
|| s.startsWith("Solaris")) {
imageView.setImageResource(R.drawable.no);
} else {
imageView.setImageResource(R.drawable.ok);
}
return rowView;
}
}
public class MyListActivity extends ListActivity {
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
String[] values = new String[] { "Android","OS/2" };
MySimpleArrayAdapter adapter = new MySimpleArrayAdapter(this,values);
setListAdapter(adapter);
}
}
8.上下文ListViews行动模式 public class MyListActivityActionbar extends ListActivity {
protected Object mActionMode;
public int selectedItem = -1;
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
String[] values = new String[] { "Android","OS/2" };
MySimpleArrayAdapter adapter = new MySimpleArrayAdapter(this,values);
setListAdapter(adapter);
getListView().setOnItemLongClickListener(new OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> parent,View view,long id) {
if (mActionMode != null) {
return false;
}
selectedItem = position;
// start the CAB using the ActionMode.Callback defined above
mActionMode = MyListActivityActionbar.this
.startActionMode(mActionModeCallback);
view.setSelected(true);
return true;
}
});
}
private ActionMode.Callback mActionModeCallback = new ActionMode.Callback() {
// called when the action mode is created; startActionMode() was called
public boolean onCreateActionMode(ActionMode mode,Menu menu) {
// Inflate a menu resource providing context menu items
MenuInflater inflater = mode.getMenuInflater();
// assumes that you have "contexual.xml" menu resources
inflater.inflate(R.menu.rowselection,menu);
return true;
}
// the following method is called each time
// the action mode is shown. Always called after
// onCreateActionMode,but
// may be called multiple times if the mode is invalidated.
public boolean onPrepareActionMode(ActionMode mode,Menu menu) {
return false; // Return false if nothing is done
}
// called when the user selects a contextual menu item
public boolean onActionItemClicked(ActionMode mode,MenuItem item) {
switch (item.getItemId()) {
case R.id.menuitem1_show:
show();
// the Action was executed,close the CAB
mode.finish();
return true;
default:
return false;
}
}
// called when the user exits the action mode
public void onDestroyActionMode(ActionMode mode) {
mActionMode = null;
selectedItem = -1;
}
};
private void show() {
Toast.makeText(MyListActivityActionbar.this,String.valueOf(selectedItem),Toast.LENGTH_LONG).show();
}
}
9.在列表视图中选择多个项目 @ model.class
public class Model {
private String name;
private boolean selected;
public Model(String name) {
this.name = name;
selected = false;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public boolean isSelected() {
return selected;
}
public void setSelected(boolean selected) {
this.selected = selected;
}
}
@@ rowbuttonlayout.xml.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@+id/label"
android:textSize="30px" >
</TextView>
<CheckBox
android:id="@+id/check"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_marginLeft="4px"
android:layout_marginRight="10px" >
</CheckBox>
</RelativeLayout>
@@@ InteractiveArrayAdapter public class InteractiveArrayAdapter extends ArrayAdapter<Model> {
private final List<Model> list;
private final Activity context;
public InteractiveArrayAdapter(Activity context,List<Model> list) {
super(context,R.layout.rowbuttonlayout,list);
this.context = context;
this.list = list;
}
static class ViewHolder {
protected TextView text;
protected CheckBox checkbox;
}
@Override
public View getView(int position,ViewGroup parent) {
View view = null;
if (convertView == null) {
LayoutInflater inflator = context.getLayoutInflater();
view = inflator.inflate(R.layout.rowbuttonlayout,null);
final ViewHolder viewHolder = new ViewHolder();
viewHolder.text = (TextView) view.findViewById(R.id.label);
viewHolder.checkbox = (CheckBox) view.findViewById(R.id.check);
viewHolder.checkbox
.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {
Model element = (Model) viewHolder.checkbox
.getTag();
element.setSelected(buttonView.isChecked());
}
});
view.setTag(viewHolder);
viewHolder.checkbox.setTag(list.get(position));
} else {
view = convertView;
((ViewHolder) view.getTag()).checkbox.setTag(list.get(position));
}
ViewHolder holder = (ViewHolder) view.getTag();
holder.text.setText(list.get(position).getName());
holder.checkbox.setChecked(list.get(position).isSelected());
return view;
}
}
@@@@ MyList public class MyList extends ListActivity {
/** Called when the activity is first created. */
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
// create an array of Strings,that will be put to our ListActivity
ArrayAdapter<Model> adapter = new InteractiveArrayAdapter(this,getModel());
setListAdapter(adapter);
}
private List<Model> getModel() {
List<Model> list = new ArrayList<Model>();
list.add(get("Linux"));
list.add(get("Windows7"));
list.add(get("Suse"));
list.add(get("Eclipse"));
list.add(get("Ubuntu"));
list.add(get("Solaris"));
list.add(get("Android"));
list.add(get("iPhone"));
// Initially select one of the items
list.get(1).setSelected(true);
return list;
}
private Model get(String s) {
return new Model(s);
}
}
单选 、多选、：http://blog.csdn.net/fx_sky/article/details/9381651
10 expandable listView @activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<ExpandableListView
android:id="@+id/listView"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ExpandableListView>
</LinearLayout>
@@ listrow_group.xml. <CheckedTextView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="?android:attr/listPreferredItemHeight"
android:layout_marginLeft="8dp"
android:drawableRight="@drawable/ic_launcher"
android:gravity="left"
android:paddingLeft="32dp"
android:paddingTop="8dp"
android:text="Test"
android:textSize="14sp"
android:textAlignment="textEnd"
android:textStyle="bold" />
listrow_details.xml. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="40dp"
android:clickable="true"
android:orientation="vertical"
android:paddingLeft="40dp"
tools:context=".MainActivity" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:drawableLeft="@drawable/ic_launcher"
android:drawablePadding="5dp"
android:gravity="center_vertical"
android:text="@string/hello_world"
android:textSize="14sp"
android:textStyle="bold" >
</TextView>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="@android:color/black" />
</LinearLayout>
@@@ MyExpandableListAdapter public class MyExpandableListAdapter extends BaseExpandableListAdapter {
private final SparseArray<Group> groups;
public LayoutInflater inflater;
public Activity activity;
public MyExpandableListAdapter(Activity act,SparseArray<Group> groups) {
activity = act;
this.groups = groups;
inflater = act.getLayoutInflater();
}
@Override
public Object getChild(int groupPosition,int childPosition) {
return groups.get(groupPosition).children.get(childPosition);
}
@Override
public long getChildId(int groupPosition,int childPosition) {
return 0;
}
@Override
public View getChildView(int groupPosition,final int childPosition,boolean isLastChild,ViewGroup parent) {
final String children = (String) getChild(groupPosition,childPosition);
TextView text = null;
if (convertView == null) {
convertView = inflater.inflate(R.layout.listrow_details,null);
}
text = (TextView) convertView.findViewById(R.id.textView1);
text.setText(children);
convertView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(activity,children,Toast.LENGTH_SHORT).show();
}
});
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
return groups.get(groupPosition).children.size();
}
@Override
public Object getGroup(int groupPosition) {
return groups.get(groupPosition);
}
@Override
public int getGroupCount() {
return groups.size();
}
@Override
public void onGroupCollapsed(int groupPosition) {
super.onGroupCollapsed(groupPosition);
}
@Override
public void onGroupExpanded(int groupPosition) {
super.onGroupExpanded(groupPosition);
}
@Override
public long getGroupId(int groupPosition) {
return 0;
}
@Override
public View getGroupView(int groupPosition,boolean isExpanded,ViewGroup parent) {
if (convertView == null) {
convertView = inflater.inflate(R.layout.listrow_group,null);
}
Group group = (Group) getGroup(groupPosition);
((CheckedTextView) convertView).setText(group.string);
((CheckedTextView) convertView).setChecked(isExpanded);
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition,int childPosition) {
return false;
}
}
@@@@ MainActivity public class MainActivity extends Activity {
// more efficient than HashMap for mapping integers to objects
SparseArray<Group> groups = new SparseArray<Group>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
createData();
ExpandableListView listView = (ExpandableListView) findViewById(R.id.listView);
MyExpandableListAdapter adapter = new MyExpandableListAdapter(this,groups);
listView.setAdapter(adapter);
}
public void createData() {
for (int j = 0; j < 5; j++) {
Group group = new Group("Test " + j);
for (int i = 0; i < 5; i++) {
group.children.add("Sub Item" + i);
}
groups.append(j,group);
}
}
}
11.listiview Header and Footer public class MyList extends ListActivity {
/** Called when the activity is first created. */
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
// create an array of Strings,that will be put to our ListActivity
String[] names = new String[] { "Linux","Eclipse","Suse","Solaris","iPhone" };
View header = getLayoutInflater().inflate(R.layout.header,null);
View footer = getLayoutInflater().inflate(R.layout.footer,null);
ListView listView = getListView();
listView.addHeaderView(header);
listView.addFooterView(footer);
setListAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_single_choice,android.R.id.text1,names));
}
}
12SimpleCursorAdapter
public class MyListActivity extends ListActivity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Cursor mCursor = getContacts();
startManagingCursor(mCursor);
// now create a new list adapter bound to the cursor.
// SimpleListAdapter is designed for binding to a Cursor.
ListAdapter adapter = new SimpleCursorAdapter(this,// Context.
android.R.layout.two_line_list_item,// Specify the row template
// to use (here,two
// columns bound to the
// two retrieved cursor
// rows).
mCursor,// Pass in the cursor to bind to.
// Array of cursor columns to bind to.
new String[] { ContactsContract.Contacts._ID,ContactsContract.Contacts.DISPLAY_NAME },// Parallel array of which template objects to bind to those
// columns.
new int[] { android.R.id.text1,android.R.id.text2 });
// Bind to our new adapter.
setListAdapter(adapter);
}
private Cursor getContacts() {
// Run query
Uri uri = ContactsContract.Contacts.CONTENT_URI;
String[] projection = new String[] { ContactsContract.Contacts._ID,ContactsContract.Contacts.DISPLAY_NAME };
String selection = ContactsContract.Contacts.IN_VISIBLE_GROUP + " = '"
+ ("1") + "'";
String[] selectionArgs = null;
String sortOrder = ContactsContract.Contacts.DISPLAY_NAME
+ " COLLATE LOCALIZED ASC";
return managedQuery(uri,projection,selection,selectionArgs,sortOrder);
}
}
解决ListView和Scrollviewd的问题
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