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我遇到的问题是我在展开的视图中键入的文本没有被保存。当我关闭一组以打开另一组时，所有保存在第一组中的值消失。任何人都可以告诉我该怎么做，所以不仅可以保存它，而且可以保存当我打开expandedView时，也可以保存当我重新启动或恢复时。我不知道如何使用onResume和onRestart函数。由于EditText在关闭expandedView后消失
我附上的代码，以及：
import android.content.Context;
import android.content.SharedPreferences;
import android.database.DataSetObserver;
import android.graphics.Color;
import android.preference.PreferenceManager;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.EditText;
import android.widget.ListAdapter;
import android.widget.TextView;
public class MyAdapter extends BaseExpandableListAdapter
{
private int counter;
SharedPreferences getPrefs;
private Context context;
String[] parent= new String [4];
String[][] child= new String [4][4];
String [][] weights= new String [4][4];
boolean KU=false;
boolean MC=false;
boolean TI=false;
boolean C=false;
boolean allEdited=false;
EditText et1;
EditText et2;
EditText et3;
EditText et4;
public MyAdapter(Context context)
{
this.context=context;
}
@Override
public Object getChild(int arg0, int arg1) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return 0;
}
@Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView,
ViewGroup parent)
{
counter++;
if (!allEdited)
{
et1= new EditText (context);
et2= new EditText (context);
et3= new EditText (context);
et4= new EditText (context);
child[groupPosition][0]=et1.getText().toString();
child[groupPosition][1]=et2.getText().toString();
child[groupPosition][2]=et3.getText().toString();
child[groupPosition][3]=et4.getText().toString();
}
if(!KU)
{
et1.setText(child[groupPosition][childPosition]);
et1.setPadding(50, 10, 10, 10);
et1.setTextSize(15);
et1.setTextColor(Color.WHITE);
et1.setFocusable(true);
et1.setInputType(0x00000002);
weights[groupPosition][0]=(et1.getText().toString());
}
if (!et1.getText().toString().equals(""))
{
KU=true;
}
if(KU)
{
et1.setText(weights[groupPosition][0]);
et1.setFreezesText(true);
}
if (!MC)
{
et2.setText(child[groupPosition][childPosition]);
et2.setPadding(50, 10, 10, 10);
et2.setTextSize(15);
et2.setTextColor(Color.WHITE);
et2.setFocusable(true);
et2.setInputType(0x00000002);
weights[groupPosition][1]=(et2.getText().toString());
}
else if (!et2.getText().toString().equals(""))
{
MC=true;
}
weights[groupPosition][1]=(et2.getText().toString());
if(MC)
{
et1.setText(weights[groupPosition][1]);
}
if (!TI)
{
et3.setText(child[groupPosition][childPosition]);
et3.setPadding(50, 10, 10, 10);
et3.setTextSize(15);
et3.setTextColor(Color.WHITE);
et3.setFocusable(true);
et3.setInputType(0x00000002);
weights[groupPosition][2]=(et3.getText().toString());
}
else if (!et3.getText().toString().equals(""))
{
TI=true;
}
weights[groupPosition][2]=(et3.getText().toString());
if(TI)
{
et3.setText(weights[groupPosition][2]);
}
if (!C)
{
et4.setText(child[groupPosition][childPosition]);
et4.setPadding(50, 10, 10, 10);
et4.setTextSize(15);
et4.setTextColor(Color.WHITE);
et4.setFocusable(true);
et4.setInputType(0x00000002);
weights[groupPosition][3]=(et4.getText().toString());
}
else if (!et4.getText().toString().equals(""))
{
C=true;
}
weights[groupPosition][3]=(et1.getText().toString());
if(C)
{
et4.setText(weights[groupPosition][3]);
}
if (KU && MC && TI && C)
{
allEdited=true;
}
if (counter==1)
return et1;
else if (counter==2)
return et2;
else if (counter==3)
return et3;
else if (counter==4)
return et4;
else
counter=0; return et1;
}
@Override
public int getChildrenCount(int groupPosition) {
// TODO Auto-generated method stub
return child[groupPosition].length;
}
@Override
public Object getGroup(int groupPosition) {
// TODO Auto-generated method stub
return groupPosition;
}
@Override
public int getGroupCount()
{
return parent.length;
}
@Override
public long getGroupId(int groupPosition)
{
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent)
{
TextView tv= new TextView (context);
this.parent[groupPosition]=tv.getText().toString();
getPrefs = PreferenceManager.getDefaultSharedPreferences(context);
String allCourses= getPrefs.getString("allClasses", "Please enter your course code");
String[] courses= allCourses.split(",");
for (int i=0;i<courses.length;i++)
{
this.parent[i]=courses[i];
}
tv.setText(this.parent[groupPosition]);
tv.setPadding(50, 10, 10, 10);
tv.setTextSize(20);
tv.setTextColor(Color.GREEN);
return tv;
}
我已经尝试实施SQLite数据库，但我不知道如果我做得正确。问题仍然存在。请告诉我 –
还是有可能将数据保存在共享首选项中，并使其在首选项中不可见 –
您正在更新您的字符串数组，例如。 child [groupPosition] [0]使用'et1.getText（）。toString（）;'onResume将为null，因此没有值。您需要使用SQLite数据库或sharedPreference将值分配给字符串数组。这样他们将显示保存的数据。还有一些参与者，总是喜欢帮助你的答案。这将鼓励用户回答你。 –