具体报错见下面。高手求解决·····
先贴代码,下面是PointMgrActivity.java
package com.app.bluetoothpro;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import com.app.DB.DBManager;
import com.app.DB.PointClass;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.SimpleAdapter;
public class PointMgrActivity extends Activity {
protected static final String ACTIVITY_TAG = "LogDemo";
private DBManager dbManager;
public SQLiteDatabase db;
String gID;
String pStatu;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.point_mgr);
dbManager = new DBManager(this);
/*
* Points person = new Points(); person.pid = "id1"; person.pstatu =
* "OFF"; db.execSQL("INSERT INTO points VALUES (?, ?)", new
* Object[]{person.pid, person.pstatu});
*/
addbtn();
}
/********************************* 添加add方法 ****************************************/
public void add() {
ArrayList<PointClass> persons = new ArrayList<PointClass>();
PointClass person = new PointClass(gID, pStatu);
persons.add(person);
dbManager.add(persons);
}
* */***************************** 添加query()查询方法 ******************************/
public void query() {
List<PointClass> persons = dbManager.query();
ArrayList<HashMap<String, Object>> listItem = new ArrayList<HashMap<String, Object>>();
for (PointClass person : persons) {
HashMap<String, Object> map = new HashMap<String, Object>();
map.put("pid", person.pid);
map.put("pstatu", getstatu(pStatu));
listItem.add(map);
Log.d(ACTIVITY_TAG, person.pid + " +++++++++++++++++++++++++++ "
+ getstatu(pStatu));
}
ListView list = (ListView) findViewById(R.id.pointListView);
SimpleAdapter listItemAdapter = new SimpleAdapter(this, listItem,
R.layout.point_mgr_list_item,
new String[] { "pointsID", "pointsStatu" },
new int[] { R.id.pointsID, R.id.pointsStatu });
list.setAdapter(listItemAdapter);
list.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
}
});
}
private Object getstatu(String str) {
// TODO Auto-generated method stub
if (str.equals("ON")) {
return R.drawable.led_green;
} else {
return R.drawable.led_red;
}
}* *
/************************* 为添加按钮添加事件 **************************/
void addbtn() {
ImageButton ib_add = (ImageButton) findViewById(R.id.addpoint);
ib_add.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
LayoutInflater inflater = getLayoutInflater();
final View layout = inflater.inflate(R.layout.add_dialog,
(ViewGroup) findViewById(R.id.dialog));
new AlertDialog.Builder(PointMgrActivity.this)
.setTitle("请添加节点")
.setView(layout)
.setPositiveButton("确定",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
EditText et = (EditText) layout
.findViewById(R.id.addID);
gID = et.getText().toString();
pStatu = "OFF";
/***************************************** 将输入的id,状态写入map中 **************/
Log.i(PointMgrActivity.ACTIVITY_TAG,
gID + " " + pStatu);
// insert(db,gID,pStatu);
// close(db);
add();
query();
/******************** 调试代码 ********************************************/
Log.i(PointMgrActivity.ACTIVITY_TAG,
gID);
/***************************************************************************************/
}
})
.setNegativeButton("取消",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
}
}).show();
}
});
}
}
layout.xml布局文件中有listview,有 两列textview imageview ,
上面query()方法是将从sqlite查询的数据在listview显示,下面是适配器代码:
ListView list = (ListView) findViewById(R.id.pointListView);
SimpleAdapter listItemAdapter = new SimpleAdapter(this, listItem,
R.layout.point_mgr_list_item,
new String[] { "pointsID", "pointsStatu" },
new int[] { R.id.pointsID, R.id.pointsStatu });
list.setAdapter(listItemAdapter);
log调试得到正确从数据库查询数据,就是不listview显示数据.
运行报错:
10-23 10:56:36.670: E/BitmapFactory(12701): Unable to decode stream: java.io.FileNotFoundException: /: open failed: EISDIR (Is a directory)