[英]Android Studio ListView Checkbox Save
我已经看了一些关于stackoverflow的关于这个问题的其他问题但是我无法将这个问题实现到我的代码中,因为我相信我做的事情有点不同。 我还在学习Android Studio,所以请耐心等待任何愚蠢。
我希望在列表视图的右侧创建复选框,当前用户将加载应用程序时,检查时将保持该状态。
XML:
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:text="Which Will Be Next"
android:textAllCaps="false"
android:textColor="#f1b75a"
android:textSize="32sp"
android:textStyle="bold" />
<ListView
android:id="@+id/results_listview"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_below="@+id/textView3"></ListView>
</RelativeLayout>
活动代码:
public class .... extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_all_flavour);
ListView resultListView = (ListView) findViewById(R.id.results_listview);
HashMap<String, String> nameAddress = new HashMap<>();
nameAddress.put("exmp ", "Locate");
List<HashMap<String, String>> listItems = new ArrayList<>();
SimpleAdapter adapter = new SimpleAdapter(this, listItems, R.layout.list_item, new String[]{"First Address", "Second Address"},new int[]{R.id.tv1, R.id.tv3});
Iterator it = nameAddress.entrySet().iterator();
while (it.hasNext()){
HashMap<String, String> resultsMap = new HashMap<>();
Map.Entry pair = (Map.Entry)it.next();
resultsMap.put("First Address", pair.getKey().toString());
resultsMap.put("Second Address", pair.getValue().toString());
listItems.add(resultsMap);
}
resultListView.setAdapter(adapter);
}
}
列出Items.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<CheckedTextView
android:id="@+id/tv1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#ffa200"
android:textSize="21sp"
android:textStyle="bold"
android:drawableLeft="?android:attr/listChoiceIndicatorMultiple"
/>
<CheckedTextView
android:id="@+id/tv3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:textSize="16sp"
android:textStyle="bold"
/>
</LinearLayout>
任何帮助表示赞赏:)
我建议您可以使用Recyclerview而不是listview,试试这种方式
public class CardViewDataAdapter extends
RecyclerView.Adapter<CardViewDataAdapter.ViewHolder> {
private List<Student> stList;
public CardViewDataAdapter(List<Student> students) {
this.stList = students;
}
// Create new views
@Override
public CardViewDataAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
// create a new view
View itemLayoutView = LayoutInflater.from(parent.getContext()).inflate(
R.layout.cardview_row, null);
// create ViewHolder
ViewHolder viewHolder = new ViewHolder(itemLayoutView);
return viewHolder;
}
@Override
public void onBindViewHolder(ViewHolder viewHolder, int position) {
final int pos = position;
viewHolder.tvName.setText(stList.get(position).getName());
viewHolder.tvEmailId.setText(stList.get(position).getEmailId());
viewHolder.chkSelected.setChecked(stList.get(position).isSelected());
viewHolder.chkSelected.setTag(stList.get(position));
viewHolder.chkSelected.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
CheckBox cb = (CheckBox) v;
Student contact = (Student) cb.getTag();
contact.setSelected(cb.isChecked());
stList.get(pos).setSelected(cb.isChecked());
Toast.makeText(
v.getContext(),
"Clicked on Checkbox: " + cb.getText() + " is "
+ cb.isChecked(), Toast.LENGTH_LONG).show();
}
});
}
// Return the size arraylist
@Override
public int getItemCount() {
return stList.size();
}
public static class ViewHolder extends RecyclerView.ViewHolder {
public TextView tvName;
public TextView tvEmailId;
public CheckBox chkSelected;
public Student singlestudent;
public ViewHolder(View itemLayoutView) {
super(itemLayoutView);
tvName = (TextView) itemLayoutView.findViewById(R.id.tvName);
tvEmailId = (TextView) itemLayoutView.findViewById(R.id.tvEmailId);
chkSelected = (CheckBox) itemLayoutView
.findViewById(R.id.chkSelected);
}
}
// method to access in activity after updating selection
public List<Student> getStudentist() {
return stList;
}
}
http://android-pratap.blogspot.in/2015/01/recyclerview-with-checkbox-example.html
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