我在更改位置上的GroupView的背景颜色时有问题。
根据我的守则
当我按第一个数字GroupView时，则第一个数字GroupView的颜色发生变化。
和
当我按第二个数字GroupView时，第一个数字GroupView的颜色已更改。
我想在位置展开和折叠时更改GroupView颜色。
ExpandableListViewAdapter.java
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.NumberPicker;
import android.widget.TextView;
import com.acase.clouds.cloudstailor.Models.ExpandableModel;
import com.acase.clouds.cloudstailor.R;
import java.util.List;
public class ExpandableListViewAdapter extends BaseExpandableListAdapter {
private Context context;
private LayoutInflater inflater;
private List<ExpandableModel> listDataGroup;
public ExpandableListViewAdapter(Context context, List<ExpandableModel> listDataGroup) {
this.context = context;
this.listDataGroup = listDataGroup;
this.inflater = LayoutInflater.from(context);
}
@Override
public Object getChild(int groupPosition, int childPosititon) {
return listDataGroup.get(groupPosition);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return 1;
}
@Override
public View getChildView(int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
ExpandableModel model = listDataGroup.get(groupPosition);
if (convertView == null) {
convertView = inflater.inflate(model.getLayoutId(), null);
}
switch (model.getType()) {
case AGE:
setNumberPicker(convertView, model);
break;
case STATE:
setNumberPicker(convertView, model);
break;
}
return convertView;
}
private void setNumberPicker(View convertView, final ExpandableModel model) {
NumberPicker numberPicker = convertView.findViewById(R.id.numberPicker);
numberPicker.setMinValue(0);
numberPicker.setMaxValue(99);
if (!model.getValue().isEmpty()) {
numberPicker.setValue(Integer.parseInt(model.getValue()));
}
// to change formate of number in numberpicker
numberPicker.setFormatter(new NumberPicker.Formatter() {
@Override
public String format(int i) {
return String.format("%02d", i);
}
});
numberPicker.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
@Override
public void onValueChange(NumberPicker numberPicker, int i, int i1) {
model.setValue(i1 + "");
}
});
}
@Override
public int getChildrenCount(int groupPosition) {
return 1;
}
@Override
public Object getGroup(int groupPosition) {
return this.listDataGroup.get(groupPosition);
}
@Override
public int getGroupCount() {
return this.listDataGroup.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
// String headerTitle = (String) getGroup(groupPosition);
if (convertView == null) {
convertView = inflater.inflate(R.layout.list_row_group, null);
}
ExpandableModel model = listDataGroup.get(groupPosition);
TextView tv_title = convertView.findViewById(R.id.tv_title);
TextView tv_value = convertView.findViewById(R.id.tv_value);
tv_title.setText(model.getName());
tv_value.setText(model.getValue());
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
EditProfileActivity
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.ExpandableListView;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.acase.clouds.cloudstailor.Adapter.ExpandableListViewAdapter;
import com.acase.clouds.cloudstailor.Models.ExpandableModel;
import com.bumptech.glide.Glide;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class EditProfileActivity extends AppCompatActivity {
Toolbar toolbar;
ImageView profileimage;
TextView changephototext, textView;
RelativeLayout item;
private static final int PICK_IMAGE_REQUEST = 1;
public Uri path;
private ExpandableListView expandableListView;
private ExpandableListViewAdapter expandableListViewAdapter;
List<ExpandableModel> list = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_edit_profile);
toolbar = findViewById(R.id.tool).findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setTitle("Edit Profile");
profileimage = findViewById(R.id.Profile_Img);
profileimage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
fileChooser();
}
});
changephototext = findViewById(R.id.Change_Photo_Button);
changephototext.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
fileChooser();
}
});
// initializing the views
initViews();
// initializing the listeners
initListeners();
// initializing the objects
initObjects();
}
private void initViews() {
expandableListView = findViewById(R.id.expandableListView);
}
private void initListeners() {
expandableListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
ExpandableModel model = list.get(groupPosition);
Toast.makeText(EditProfileActivity.this, model.getName() + " clicked at " + childPosition, Toast.LENGTH_SHORT).show();
return false;
}
});
expandableListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
@Override
public void onGroupExpand(int groupPosition) {
ExpandableModel model = list.get(groupPosition);
Toast.makeText(EditProfileActivity.this, model.getName() + " expanded", Toast.LENGTH_SHORT).show();
item = findViewById(R.id.Group);
item.setBackgroundResource(R.drawable.selectedlistback);
textView = findViewById(R.id.tv_title);
textView.setTextColor(getResources().getColor(R.color.colorPrimaryDark));
}
});
// ExpandableListView Group collapsed listener
expandableListView.setOnGroupCollapseListener(new ExpandableListView.OnGroupCollapseListener() {
@Override
public void onGroupCollapse(int groupPosition) {
ExpandableModel model = list.get(groupPosition);
Toast.makeText(EditProfileActivity.this, model.getName() + " collapsed", Toast.LENGTH_SHORT).show();
item = findViewById(R.id.Group);
item.setBackgroundResource(R.drawable.listback);
textView = findViewById(R.id.tv_title);
textView.setTextColor(getResources().getColor(R.color.colorAccent));
}
});
}
private void initObjects() {
ExpandableModel age = new ExpandableModel("AGE", "", ExpandableModel.ExpandableType.AGE, R.layout.list_row_child);
list.add(age);
ExpandableModel state = new ExpandableModel("STATE", "", ExpandableModel.ExpandableType.STATE, R.layout.list_row_child);
list.add(state);
expandableListViewAdapter = new ExpandableListViewAdapter(this, list);
expandableListView.setAdapter(expandableListViewAdapter);
}
private void fileChooser()
{
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(intent, PICK_IMAGE_REQUEST);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data){
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data.getData() != null)
{
path = data.getData();
Glide.with(this).load(path).into(profileimage);
path = data.getData();
try {
Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(),path);
profileimage.setImageBitmap(bitmap);
}catch (IOException e){
e.printStackTrace();
}
}
}
}
最佳答案
尝试在适配器的getGroupView中添加以下代码：
if(isExpanded) {
convertView.setBackgroundResource(R.drawable.selectedlistback);
tv_title.setTextColor(context.getResources().getColor(R.color.colorPrimaryDark));
}else{
convertView.setBackgroundResource(R.drawable.listback);
tv_title.setTextColor(context.getResources().getColor(R.color.colorAccent));
}
并删除监听器。希望有帮助！
关于java - 如何在ExpandableListView中的Expand上更改GroupView背景颜色？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/56222311/