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我想用包含術語的listview開發醫學詞典,當一個項目被點擊時,細節出現在另一個意圖上。所有這些都從我的本地數據庫中提取,我不使用SQLITE。我希望醫學的每個細節都至少有一個圖像。但我只能夠檢索文本而不是圖像。android從MySql數據庫中檢索blob圖像
任何人都知道如何?
這是我顯示該藥的詳細信息的代碼。
MedInfoActivity.java
import library.JSONParser2;
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.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
public class MedInfoActivity extends Activity {
TextView txtMedInfo;
TextView med_name;
String mid;
ImageView medimg;
// Progress Dialog
private ProgressDialog pDialog;
// JSON parser class
JSONParser2 jsonParser = new JSONParser2();
// url to get all products list
private static String url_med_info = "http://10.0.2.2/android_connect/med_info.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_MEDICINE = "medicine";
private static final String TAG_MED_ID = "mid";
private static final String TAG_MED_NAME = "med_name";
private static final String TAG_MED_INFO = "med_info";
private static final String TAG_IMAGE = "image";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.med_info);
// save button
//btnSave = (Button) findViewById(R.id.btnSave);
//btnDelete = (Button) findViewById(R.id.btnDelete);
// getting product details from intent
Intent i = getIntent();
// getting product id (pid) from intent
mid = i.getStringExtra(TAG_MED_ID);
// Getting complete product details in background thread
new GetMedicineDetails().execute();
}
/**
* Background Async Task to Get complete product details
* */
class GetMedicineDetails extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MedInfoActivity.this);
pDialog.setMessage("Loading medicines details. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Getting product details in background thread
* */
protected String doInBackground(String... params) {
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
// Check for success tag
int success;
try {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("mid", mid));
// getting product details by making HTTP request
// Note that product details url will use GET request
JSONObject json = jsonParser.makeHttpRequest(
url_med_info, "GET", params);
// check your log for json response
Log.d("Single Medicine Details", json.toString());
// json success tag
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully received product details
JSONArray medObj = json
.getJSONArray(TAG_MEDICINE); // JSON Array
// get first product object from JSON Array
JSONObject medical_dictionary = medObj.getJSONObject(0);
// product with this pid found
// Edit Text
med_name = (TextView) findViewById(R.id.med_name);
txtMedInfo = (TextView) findViewById(R.id.inputMedInfo);
medimg = (ImageView) findViewById(R.id.medimg);
// display product data in EditText
txtMedInfo.setText(medical_dictionary.getString(TAG_MED_INFO));
med_name.setText(medical_dictionary.getString(TAG_MED_NAME));
medimg.setTag(medical_dictionary.getString(TAG_IMAGE));
}else{
// product with pid not found
}
} catch (JSONException e) {
e.printStackTrace();
}
}
});
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog once got all details
pDialog.dismiss();
}
}
}
med_info.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/white_bg"
android:orientation="vertical" >
<!-- Name Label -->
<TextView
android:id="@id/med_name"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingLeft="10dip"
android:paddingRight="10dip"
android:paddingTop="10dip"
android:textColor="#000000"
android:textSize="30dp" />
<!-- Input description -->
<ImageView
android:id="@+id/medimg"
android:layout_width="48dp"
android:layout_height="40dp" />
<TextView
android:id="@+id/inputMedInfo"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:layout_margin="5dip"
android:layout_marginBottom="15dip"
android:gravity="top"
android:lines="28"
android:textColor="#000000"
android:textSize="19dp" />
</LinearLayout>
誰能告訴我用我的代碼,我怎麼可以添加代碼從表medicine_dictionary圖像檢索和檢索列med_name,med_info包括圖像。請。對於那些會回答我的人,我會非常感謝和感謝。
結果中有錯誤。結果是什麼意思? – user3226149