当我触摸它并保持突出显示时，我需要突出显示一个列表视图项目。我尝试了我发现的一切，但没有任何效果。这是我的代码：
这是列表视图：
<ListView
android:id="@+id/lvUsers"
android:layout_width="300dp"
android:layout_height="fill_parent"
android:layout_alignParentLeft="true"
android:background="@drawable/border2"
android:choiceMode="singleChoice"
android:padding="5dp" >
</ListView>
这@drawable/border2只是列表视图周围的边框。
这是列表视图项目布局：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/layoutUsersRow"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/list_selector_background"
android:orientation="vertical" >
<TextView
android:id="@+id/tvAllUsersName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dp"
android:text="User name"
android:textAppearance="?android:attr/textAppearanceLarge" />
这是 list_selector_background：
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_focused="true" android:drawable="@color/blue" /> <!-- focused -->
<item android:state_focused="true" android:state_pressed="true" android:drawable="@color/blue" /> <!-- focused and pressed-->
<item android:state_pressed="true" android:drawable="@color/blue" /> <!-- pressed -->
<item android:drawable="@color/transparent" /> <!-- default -->
</selector>
这是来自 listview 适配器的代码
public class UsersAdapter extends BaseAdapter implements OnClickListener {
LoginActivity context;
private List<String> listOfUsers;
public UsersAdapter(LoginActivity _context, List<String> listOfUsers) {
context = _context;
this.listOfUsers = listOfUsers;
}
public int getCount() {
return listOfUsers.size();
}
public Object getItem(int position) {
return listOfUsers.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
String entry = listOfUsers.get(position);
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.users_row, null);
}
TextView UserName = (TextView) convertView.findViewById(R.id.tvAllUsersName);
UserName.setText(entry);
LinearLayout LinLayout = (LinearLayout) convertView.findViewById(R.id.layoutUsersRow);
LinLayout.setFocusableInTouchMode(false);
LinLayout.setFocusable(false);
LinLayout.setOnClickListener(this);
return convertView;
}
public void onClick(View v) {
// get the row the clicked button is in
LinearLayout row = (LinearLayout) v;
TextView child = (TextView) row.getChildAt(0);
if (child.getText().toString().equals("Admin")) {
Intent i = new Intent("com.vorteksed.checkinform.ADMINLOGINACTIVITY");
i.putExtra("verificationFor", "ADMIN_LOGIN");
context.startActivity(i);
} else {
context.userClicked(child.getText().toString());
// focus the pin field after selecting user name from the list
if (context.currentList != null) {
context.etLoginPin.setVisibility(View.VISIBLE);
context.tvPin.setVisibility(View.VISIBLE);
context.etLoginPin.requestFocus();
context.etLoginPin.setText("");
InputMethodManager imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
imm.showSoftInput(context.etLoginPin, 0);
}
}
}
}
这是行不通的。它仅在按下时突出显示该项目。一旦我释放它，亮点就消失了。
这是解决方案
android:background="@drawable/list_selector_background"从列表视图项布局中删除该行。根本不需要选择器。这是适配器的代码：
public class UsersAdapter extends BaseAdapter {
LoginActivity context;
private List<String> listOfUsers;
boolean[] arrBgcolor;
private int blue = Color.BLUE;
private int transparent = Color.TRANSPARENT;
public UsersAdapter(LoginActivity _context, List<String> listOfUsers) {
context = _context;
this.listOfUsers = listOfUsers;
arrBgcolor = new boolean[listOfUsers.size()];
resetArrbg();
}
private void resetArrbg() {
for (int i = 0; i < arrBgcolor.length; i++) {
arrBgcolor[i] = false;
}
}
public int getCount() {
return listOfUsers.size();
}
public Object getItem(int position) {
return listOfUsers.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(final int position, View convertView, ViewGroup parent) {
String entry = listOfUsers.get(position);
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.users_row, null);
}
TextView UserName = (TextView) convertView.findViewById(R.id.tvAllUsersName);
UserName.setText(entry);
LinearLayout LinLayout = (LinearLayout) convertView.findViewById(R.id.layoutUsersRow);
LinLayout.setFocusableInTouchMode(false);
LinLayout.setFocusable(false);
LinLayout.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
handleClick(v, position);
}
});
if (arrBgcolor[position])
LinLayout.setBackgroundColor(blue);
else
LinLayout.setBackgroundColor(transparent);
return convertView;
}
public void handleClick(View v, int position) {
LinearLayout row = (LinearLayout) v;
resetArrbg();
arrBgcolor[position] = true;
notifyDataSetChanged();
TextView child = (TextView) row.getChildAt(0);
if (child.getText().toString().equals("Admin")) {
Intent i = new Intent("com.vorteksed.checkinform.ADMINLOGINACTIVITY");
i.putExtra("verificationFor", "ADMIN_LOGIN");
context.startActivity(i);
} else {
context.userClicked(child.getText().toString());
// focus the pin field after selecting user name from the list
if (context.currentList != null) {
context.etLoginPin.setVisibility(View.VISIBLE);
context.tvPin.setVisibility(View.VISIBLE);
context.etLoginPin.requestFocus();
context.etLoginPin.setText("");
InputMethodManager imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
imm.showSoftInput(context.etLoginPin, 0);
}
}
}
}