Android 将url中的图像插入Sqlite表
我正在尝试使用blob将图像插入sqlite数据库我不想将图像存储在存储卡中并从中读取,因为我不想让用户访问它。表中有一行名为image,数据来自mysql数据库Android 将url中的图像插入Sqlite表,android,mysql,sqlite,Android,Mysql,Sqlite,我正在尝试使用blob将图像插入sqlite数据库我不想将图像存储在存储卡中并从中读取,因为我不想让用户访问它。表中有一行名为image,数据来自mysql数据库 package com.mall.our; import java.io.ByteArrayOutputStream; import java.util.ArrayList; import java.util.HashMap; import android.content.ContentValues; import android
package com.mall.our;
import java.io.ByteArrayOutputStream;
import java.util.ArrayList;
import java.util.HashMap;
import android.content.ContentValues;
import android.content.Context;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.preference.PreferenceManager;
import android.util.Log;
public class DBTool extends SQLiteOpenHelper {
private Context appContext;
static final String firstname="firstname";
static final String lastname="lastname";
public DBTool(Context applicationContext){
super(applicationContext, "friend.db", null, 1);
this.appContext = applicationContext;
}
@Override
public void onCreate(SQLiteDatabase database) {
String query = "CREATE TABLE friends ( contactId INTEGER PRIMARY KEY, name TEXT, " +
"message TEXT, image BLOB)";
database.execSQL(query);
}
@Override
public void onUpgrade(SQLiteDatabase database, int oldVersion, int newVersion) {
String query = "DROP TABLE IF EXISTS friends";
database.execSQL(query);
onCreate(database);
}
public void insertContact(HashMap<String, String> queryValues){
SQLiteDatabase database = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put("name", queryValues.get("name"));
values.put("message", queryValues.get("message"));
values.put("image", queryValues.get("image"));
database.insert("friends", null, values);
database.close();
}
public ArrayList<HashMap<String, String>> getAllContacts(){
ArrayList<HashMap<String, String>> contactArrayList = new ArrayList<HashMap<String, String>>();
String selectQuery = "SELECT * FROM friends";
SQLiteDatabase database = this.getWritableDatabase();
Cursor cursor = database.rawQuery(selectQuery, null);
if(cursor.moveToFirst()){
do{
HashMap<String, String> contactMap = new HashMap<String, String>();
contactMap .put("name", cursor.getString(0));
contactMap .put("message", cursor.getString(1));
contactMap .put("image", cursor.getString(2));
contactArrayList.add(contactMap);
} while(cursor.moveToNext());
}
return contactArrayList;
}
public int updateContact(HashMap<String, String> queryValues){
SQLiteDatabase database = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put("name", queryValues.get("name"));
values.put("message", queryValues.get("message"));
values.put("image", queryValues.get("image"));
return database.update("friends", values,
"contactId" + " = ?", new String[] {queryValues.get("contactId") });
}
public void deleteContact(){
SQLiteDatabase database = this.getWritableDatabase();
String deleteQuery = "DELETE FROM friends ";
database.execSQL(deleteQuery);
}
public HashMap<String, String> getContactInfo(String id){
HashMap<String, String> contactMap = new HashMap<String, String>();
SQLiteDatabase database = this.getReadableDatabase();
String selectQuery = "SELECT * FROM friends WHERE contactId='" + id + "'";
Cursor cursor = database.rawQuery(selectQuery, null);
if(cursor.moveToFirst()){
do{
contactMap.put("name", cursor.getString(0));
contactMap.put("message", cursor.getString(1));
contactMap.put("image", cursor.getString(2));
} while(cursor.moveToNext());
}
return contactMap;
}
}
package com.mall.our;
导入java.io.ByteArrayOutputStream;
导入java.util.ArrayList;
导入java.util.HashMap;
导入android.content.ContentValues;
导入android.content.Context;
导入android.content.SharedReferences;
导入android.database.Cursor;
导入android.database.sqlite.SQLiteDatabase;
导入android.database.sqlite.SQLiteException;
导入android.database.sqlite.SQLiteOpenHelper;
导入android.graphics.Bitmap;
导入android.graphics.BitmapFactory;
导入android.preference.PreferenceManager;
导入android.util.Log;
公共类DBTool扩展了SQLiteOpenHelper{
私人语境;
静态最终字符串firstname=“firstname”;
静态最终字符串lastname=“lastname”;
公共数据库工具(上下文应用程序上下文){
super(applicationContext,“friend.db”,null,1);
this.appContext=applicationContext;
}
@凌驾
public void onCreate(SQLiteDatabase){
String query=“创建表朋友(contactId整数主键,名称文本,”+
“消息文本、图像块)”;
execSQL(查询);
}
@凌驾
public void onUpgrade(SQLiteDatabase数据库,int-oldVersion,int-newVersion){
String query=“如果存在朋友,则删除表”;
execSQL(查询);
onCreate(数据库);
}
public void insertContact(HashMap queryvalue){
SQLiteDatabase=this.getWritableDatabase();
ContentValues=新的ContentValues();
value.put(“name”),queryvalue.get(“name”);
value.put(“message”),queryvalue.get(“message”);
value.put(“image”),queryvalue.get(“image”);
数据库。插入(“朋友”,空,值);
close()数据库;
}
公共阵列列表getAllContacts(){
ArrayList contactArrayList=新建ArrayList();
String selectQuery=“SELECT*FROM friends”;
SQLiteDatabase=this.getWritableDatabase();
Cursor=database.rawQuery(selectQuery,null);
if(cursor.moveToFirst()){
做{
HashMap contactMap=新建HashMap();
contactMap.put(“name”,cursor.getString(0));
contactMap.put(“message”,cursor.getString(1));
contactMap.put(“image”,cursor.getString(2));
contactArrayList.add(contactMap);
}while(cursor.moveToNext());
}
返回联系人列表;
}
public int updateContact(HashMap查询值){
SQLiteDatabase=this.getWritableDatabase();
ContentValues=新的ContentValues();
value.put(“name”),queryvalue.get(“name”);
value.put(“message”),queryvalue.get(“message”);
value.put(“image”),queryvalue.get(“image”);
返回数据库。更新(“朋友”,值,
“contactId”+“=?”,新字符串[]{queryValues.get(“contactId”)});
}
公共联系人(){
SQLiteDatabase=this.getWritableDatabase();
String deleteQuery=“从朋友中删除”;
execSQL(deleteQuery);
}
公共HashMap getContactInfo(字符串id){
HashMap contactMap=新建HashMap();
SQLiteDatabase=this.getReadableDatabase();
String selectQuery=“SELECT*FROM friends,其中contactId=”+id+“”;
Cursor=database.rawQuery(selectQuery,null);
if(cursor.moveToFirst()){
做{
contactMap.put(“name”,cursor.getString(0));
contactMap.put(“message”,cursor.getString(1));
contactMap.put(“image”,cursor.getString(2));
}while(cursor.moveToNext());
}
返回联系人地图;
}
}
这是我的另一节课
package com.mall.our;
import java.io.IOException;
import java.net.URL;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONObject;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.TextView;
import com.actionbarsherlock.app.SherlockListFragment;
import com.mall.first.JSONParser;
import com.mall.first.R;
public class Chat extends SherlockListFragment {
JSONParser jsonParser = new JSONParser();
private static final String TAG_POSTS = "posts";
public static final String TAG_ID = "id";
public static final String TAG_NAME = "name";
public static final String TAG_pic = "pic";
public static final String TAG_MESSAGE = "message";
public static final String TAG_CATEGORIES_LOGO = "categories_logo";
DBTool dbTool = new DBTool(getActivity());
/*
user details
private static final String NAME = "name";
private static final String AGE = "age";
private static final String STATUS = "status";
private static final String PIC = "pic";
private static final String SEX = "sex"; String friendname,status;
private static final String TAG_SUCCESS = "success";*/
//user
private static final String URL = "http://10.0.2.2/ochat/chattingname.php";
private static final String URL_CATEGORY = "http://10.0.2.2/ochat/selectchat.php";
private BaseAdapter mAdapter;
private ListView lv;
SharedPreferences sp ;
Bundle bon = new Bundle();
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.friends, container, false);
return rootView;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
new LoadComments().execute();
}
class LoadComments extends AsyncTask<Void, Void, ArrayList<HashMap<String,String>>> {
private ProgressDialog pDialog;
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(getActivity());
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
}
@Override
protected ArrayList<HashMap<String, String>> doInBackground(Void... arg0) {
ArrayList<HashMap<String, String>> categoryList = new ArrayList<HashMap<String, String>>();
SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(getActivity());
String username = sp.getString("username", "anon");
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("username", username));
JSONObject json = jsonParser.makeHttpRequest(URL_CATEGORY, "POST",
params);
try {
JSONArray categories = json.getJSONArray(TAG_POSTS);
for (int i = 0; i < categories.length(); i++) {
String id = categories.getJSONObject(i).getString("TAG_ID");
String name = categories.getJSONObject(i).getString("TAG_NAME");
String pic = categories.getJSONObject(i).getString("TAG_pic");
String message = categories.getJSONObject(i).getString("TAG_MESSAGE");
HashMap<String, String> queryValuesMap = new HashMap<String, String>();
queryValuesMap.put("name", name);
queryValuesMap.put("image", pic);
queryValuesMap.put("message",message);
dbTool.insertContact(queryValuesMap);
}
}catch (Throwable e){
e.printStackTrace();
}
return categoryList;
}
@Override
protected void onPostExecute(ArrayList<HashMap<String, String>> result) {
super.onPostExecute(result);
}
}
}
package com.mall.our;
导入java.io.IOException;
导入java.net.URL;
导入java.io.InputStream;
导入java.net.HttpURLConnection;
导入java.util.ArrayList;
导入java.util.HashMap;
导入java.util.List;
导入org.apache.http.NameValuePair;
导入org.apache.http.message.BasicNameValuePair;
导入org.json.JSONArray;
导入org.json.JSONObject;
导入android.app.ProgressDialog;
导入android.content.Intent;
导入android.content.SharedReferences;
导入android.content.SharedReferences.Editor;
导入android.graphics.Bitmap;
导入android.graphics.BitmapFactory;
导入android.os.AsyncTask;
导入android.os.Bundle;
导入android.preference.PreferenceManager;
导入android.view.LayoutInflater;
导入android.view.view;
导入android.view.ViewGroup;
导入android.widget.AdapterView;
导入android.widget.BaseAdapter;
导入android.widget.ImageView;
导入android.widget.ListView;
导入android.widget.AdapterView.OnItemClickListener;
导入android.widget.TextView;
导入com.actionbarsherlock.app.SherlockListFragment;
导入com.mall.first.JSONParser;
导入com.mall.first.R;
公共类聊天扩展了SherlockListFragment{
JSONParser JSONParser=新的JSONParser();
私有静态最终字符串标记_POSTS=“POSTS”;
公共静态最终字符串标记\u ID=“ID”;
公共静态最终字符串标记_NAME=“NAME”;
公共静态最终字符串标记\u pic=“pic”;
公共静态最终字符串标记_MESSAGE=“MESSAGE”;
公共静态最终字符串TAG\u CATEGORIES\u LOGO=“CATEGORIES\u LOGO”;
DBTool DBTool=newdbtool(getActivity());
/*
用户详细信息
私有静态最终字符串NAME=“NAME”;
私有静态最终字符串AGE=“AGE”;
私人sta
ArrayList<String> list = new ArrayList<String>(); list.add(pic);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
// converting drawable to bitmap
_bitmapToInsert = ((BitmapDrawable) getResources().getDrawable(
R.drawable.skholingua)).getBitmap();
// compressing bitmap
_bitmapToInsert.compress(Bitmap.CompressFormat.PNG, 100, baos);
// converting bitmap to byte array
_photoToInsert = baos.toByteArray();
// inserting into to database
_sqlLiteManger.insert(_photoToInsert);