我正在创建一个Android应用程序，其中json数据通过API解析并存储在数据库中。并且存储的数据将显示在列表视图中。下面显示的代码用于显示商店数据。
我的问题是如何在ActionBarCallback类中获取所选的listview项目，以便在长按时我可以通过操作栏图标删除传递的项目。
package com.async2.example;
import java.util.ArrayList;
import java.util.HashMap;
import android.app.Activity;
import android.app.SearchManager;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.util.SparseBooleanArray;
import android.view.ActionMode;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.SearchView;
import android.widget.TextView;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import com.async2.example.db.DBcontact;
public class SQLView extends Activity {
static final String ID = "id";
static final String NAME = "name";
static final String ADDRESS = "address";
static final String GENDER = "gender";
static final String EMAIL = "email";
static final String MOBILE = "mobile";
private ActionMode mActionMode;
ArrayList<HashMap<String, String>> listFill;
ListView lv;
DBcontact db;
Cursor data;
Context context;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listFill = new ArrayList<HashMap<String, String>>();
lv = (ListView) findViewById(R.id.listView1);
db = new DBcontact(getApplicationContext());
db.open();
data = db.getInfo();
String[] id = new String[data.getCount()];
String[] name = new String[data.getCount()];
String[] address = new String[data.getCount()];
String[] email = new String[data.getCount()];
String[] gender = new String[data.getCount()];
String[] mobile = new String[data.getCount()];
data.moveToFirst();
for (int i = 0; i < data.getCount(); i++) {
String d = data.getString(0);
String n = data.getString(1);
String a = data.getString(2);
String e = data.getString(3);
String g = data.getString(4);
String m = data.getString(5);
id[i] = d;
name[i] = n;
address[i] = a;
email[i] = e;
gender[i] = g;
mobile[i] = m;
data.moveToNext();
}
data.close();
for (int i = 0; i < name.length; i++) {
HashMap<String, String> map = new HashMap<String, String>();
map.put(ID, id[i]);
map.put(NAME, name[i]);
map.put(ADDRESS, address[i]);
map.put(EMAIL, email[i]);
map.put(GENDER, gender[i]);
map.put(MOBILE, mobile[i]);
// System.out.println("name:" + map.get("NAME"));
listFill.add(map);
}
final MyCustomAdapter adapter;
adapter = new MyCustomAdapter(getApplicationContext(), listFill);
lv.setAdapter(adapter);
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
String rid = ((TextView) view.findViewById(R.id.list_id))
.getText().toString();
String name = ((TextView) view.findViewById(R.id.list_name))
.getText().toString();
String email = ((TextView) view.findViewById(R.id.list_email))
.getText().toString();
String address = ((TextView) view
.findViewById(R.id.list_address)).getText().toString();
String gender = ((TextView) view.findViewById(R.id.list_gender))
.getText().toString();
String mobile = ((TextView) view.findViewById(R.id.list_mobile))
.getText().toString();
// Starting single contact activity
Intent in = new Intent(getApplicationContext(), EditPage.class);
in.putExtra(ID, rid);
in.putExtra(NAME, name);
in.putExtra(ADDRESS, address);
in.putExtra(GENDER, gender);
in.putExtra(EMAIL, email);
in.putExtra(MOBILE, mobile);
startActivity(in);
}
});
lv.setOnItemLongClickListener(new OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> arg0, View view,
int position, long arg3) {
// // TODO Auto-generated method stub
mActionMode = SQLView.this
.startActionMode(new ActionBarCallBack());
return true;
}
});
// adapter.notifyDataSetChanged();
}
class ActionBarCallBack implements ActionMode.Callback {
@Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
// TODO Auto-generated method stub
switch (item.getItemId()) {
case R.id.item_delete:
DBcontact ex = new DBcontact(getApplicationContext());
ex.open();
ex.deleteEntry();
ex.close();
Toast.makeText(SQLView.this, "deleted", Toast.LENGTH_LONG)
.show();
//
mode.finish();
return true;
case R.id.item_edit:
Toast.makeText(getApplicationContext(), "edited",
Toast.LENGTH_SHORT).show();
mode.finish();
return true;
default:
return false;
}
}
@Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
// TODO Auto-generated method stub
mode.getMenuInflater().inflate(R.menu.contextual, menu);
return true;
}
@Override
public void onDestroyActionMode(ActionMode mode) {
// TODO Auto-generated method stub
}
@Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
// TODO Auto-generated method stub
mode.setTitle("ListView is Clicked");
return false;
}
}
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
db.close();
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
db.close();
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
db.open();
}
@Override
public void onBackPressed() {
// TODO Auto-generated method stub
super.onBackPressed();
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.contextual_menu, menu);
SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
SearchView searchView = (SearchView) menu.findItem(R.id.action_search)
.getActionView();
searchView.setSearchableInfo(searchManager
.getSearchableInfo(getComponentName()));
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_refresh:
Intent i = new Intent(SQLView.this, SQLView.class);
startActivity(i);
Toast.makeText(this, "refreshed", Toast.LENGTH_SHORT).show();
break;
default:
break;
}
return true;
}
}
答案 0 :(得分：0)
为ActionbarCallback创建一个构造函数，将该项作为参数。
onItemLongClick()可能如下所示：
mActionMode = SQLView.this
.startActionMode(new ActionBarCallBack(adapter.getItem(position)));
您的适配器当然必须正确实现getItem()。