我编写了一个 CustomAdapter 来将哈希键+值项的列表显示为列表。但我被困在下面的线上。
label.setText(my_VALUES[0])
第二类是我的 CustomAdapter，我正在传递一个 hashMap
public MyCustomAdapter(DynamicLists dynamicLists, int row, HashMap<String,String> data)
在这里，我组合键+值对，并将它们分配给一个名为 my_VALUES 的数组。但我不知道这是否正确？
如何在 getview 中将每个 KEY+VALUE 对打印为单独的项目。目前我只能使用 label.setText(my_VALUES[0])
谢谢
格雷厄姆包 gb.org；
//lists are not checkboxes
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import android.app.ListActivity;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
//class 1
public class DynamicLists extends ListActivity {
//class 2
public class MyCustomAdapter extends BaseAdapter {
private HashMap<String,String> mData = new HashMap<String,String>();
private String[] mKeys;
String[] my_VALUES = new String[100];
public MyCustomAdapter(DynamicLists dynamicLists, int row, HashMap<String,String> data){
mData = data;
mKeys = mData.keySet().toArray(new String[data.size()]);
Log.d(TAG, "INSIDE ADAPTER HELLO WORLD " + map.entrySet());
String[] array = new String[map.size()];
int count = 0;
String combined="";
for(Map.Entry<String, String> entry : map.entrySet()){
combined="A"+entry.getKey()+"B"+entry.getValue();
my_VALUES[count]=combined;
Log.d(TAG, " my_VALUES " + my_VALUES);
count++;
}
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
String key = mKeys[position];
String Value = getItem(position).toString();
//do your view stuff here
Log.d(TAG, "inside getview ");
View row=convertView;
if (row==null){
LayoutInflater inflater=getLayoutInflater();
row=inflater.inflate(R.layout.row, null);
}
TextView label =(TextView)row.findViewById(R.id.blocked);
label.setText(my_VALUES[0]); //printing out the last value
return row;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return mData.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return mData.get(mKeys[position]);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
} //end of class 2
private static final String TAG = "Example";
//class 1
public static HashMap<String, String> map = new HashMap<String, String>();
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//tie data to list, call constructor MyCustomAdapter
//populate the list. ArrayAdapter takes current class, layout and array
map.put("year", "Apple");
map.put("make", "Mango");
map.put("model", "Grape");
map.put("style", "Orange");
map.put("series", "Peach");
Log.d(TAG, "HELLO WORLD " + map.entrySet());
//link to my adapter
setListAdapter(new MyCustomAdapter(DynamicLists.this, R.layout.row, map));
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
// TODO Auto-generated method stub
//super.onListItemClick(l, v, position, id);
String selection = l.getItemAtPosition(position).toString();
Toast.makeText(this, selection, Toast.LENGTH_LONG).show();
}
} //end of class 1