我想通过PHP将数据从MySQL保存到我的Android SQLite数据库。我正在使用其他教程中的代码。
我使用数据库适配器和数据库助手。
我尝试了这项工作但不确定接下来要做什么，我还需要关闭数据库以防止内存泄漏。
任何人都可以告诉我这种方法是否正确以及在PhpAdapter中放入什么以将数据插入数据库。
由于
PhpActivity.java
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;
public class PhpActivity extends Activity {
private PhpAdapter dbHelper;
/** Called when the activity is first created. */
TextView txt;
//EditText edittxt;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
dbHelper = new PhpAdapter(this);
dbHelper.open();
// Create a crude view - this should really be set via the layout resources
// but since its an example saves declaring them in the XML.
LinearLayout rootLayout = new LinearLayout(getApplicationContext());
txt = new TextView(getApplicationContext());
rootLayout.addView(txt);
//edittxt = new EditText(this);
//rootLayout.addView(edittxt);
setContentView(rootLayout);
// Set the text and call the connect function.
txt.setText("Connecting...");
//call the method to run the data retreival
txt.setText(getServerData(KEY_121));
}
public static final String KEY_121 = "http://10.101.0.64/peopledata/getAllPeopleBornAfter.php"; //i use my real ip here
private String getServerData(String returnString) {
InputStream is = null;
String result = "";
//the year data to send
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("year", "2007"));
//nameValuePairs.add(new BasicNameValuePair("year", edittxt.getText().toString()));
//http post
try{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(KEY_121);
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
}catch(Exception e){
Log.e("log_tag", "Error in http connection "+e.toString());
}
//convert response to string
try{
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
result=sb.toString();
}catch(Exception e){
Log.e("log_tag", "Error converting result "+e.toString());
}
//parse json data
try{
JSONArray jArray = new JSONArray(result);
for(int i=0;i<jArray.length();i++){
JSONObject json_data = jArray.getJSONObject(i);
String qureylog ="insert or replace into table(name, sex, birthyear) " +
"values('"+json_data.getString("name")+"'," +
" '"+json_data.getString("sex")+"'," +
" '"+json_data.getString("birthyear")+"')";
dbHelper.insert(qureylog);
Log.i("log_tag","id: "+json_data.getInt("id")+
", name: "+json_data.getString("name")+
", sex: "+json_data.getString("sex")+
", birthyear: "+json_data.getInt("birthyear")
);
//Get an output to the screen
// returnString += "\n\t" + jArray.getJSONObject(i);
}
}catch(JSONException e){
Log.e("log_tag", "Error parsing data "+e.toString());
}
return returnString;
}
}
PhpAdapter.java
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
public class PhpAdapter {
private static final String DATABASE_TABLE = "people";
private Context context;
private PhpAdapter dbHelper;
private SQLiteDatabase database;
public PhpAdapter(Context context) {
this.context = context;
}
public PhpAdapter open() {
dbHelper = new PhpAdapter(context);
//database = dbHelper.getWritableDatabase();
return this;
}
public void close() {
dbHelper.close();
}
public void insert(String qureylog) {
// TODO Auto-generated method stub
}
}
DatabaseHelper
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
public class DatabaseHelper extends SQLiteOpenHelper {
private static final String DATABASE_NAME = "phpdb";
private static final int DATABASE_VERSION = 1;
public DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
private static final String DATABASE_CREATE = "create table people" +
" (_id integer primary key autoincrement, " +
"sex text , name text , birthyear text);";
// Method is called during creation of the database
@Override
public void onCreate(SQLiteDatabase database) {
database.execSQL(DATABASE_CREATE);
}
// Method is called during an upgrade of the database, e.g. if you increase
// the database version
@Override
public void onUpgrade(SQLiteDatabase database, int oldVersion,
int newVersion) {
Log.w(DatabaseHelper.class.getName(),
"Upgrading database from version " + oldVersion + " to "
+ newVersion + ", which will destroy all old data");
database.execSQL("DROP TABLE IF EXISTS people");
onCreate(database);
}
}
答案 0 :(得分：0)
基本上看起来很好。您可以在活动的onDestroy（）中关闭db。
至于dbAdapter的实现之后你就会怀疑SO上的人会为你写这个......但是简单的dbAdapter示例的一个很好的资源是Reto Meir的Android 2应用程序开发书。
您可以通过以下链接获取示例代码。您想查看第7章的代码清单。它将为您提供充足的帮助。