此应用程序尝试连接到mysql并将数据插入/更新/删除到数据库中 但是当启动应用程序时,它显示消息“不幸的是项目已停止”
MainActivity.java
package com.example.testsql;
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.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity implements OnClickListener {
Button btn_select;
Button btn_insert;
Button btn_update;
Button btn_delete;
TextView tv_res;
EditText txt_hn;
EditText txt_name;
EditText txt_age;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// ตั้งค่าตัวแปล View
tv_res = (TextView)findViewById(R.id.tv_res);
txt_hn = (EditText)findViewById(R.id.txt_hn);
txt_name = (EditText)findViewById(R.id.txt_name);
txt_age = (EditText)findViewById(R.id.txt_age);
btn_select = (Button)findViewById(R.id.btn_select);
btn_select.setOnClickListener(this);
btn_insert = (Button)findViewById(R.id.btn_insert);
btn_insert.setOnClickListener(this);
btn_update = (Button)findViewById(R.id.btn_update);
btn_update.setOnClickListener(this);
btn_delete = (Button)findViewById(R.id.btn_delete);
btn_delete.setOnClickListener(this);
}
@Override
public void onClick(View v){
switch(v.getId()){
case R.id.btn_select:
{
select();
break;
}
case R.id.btn_insert:
{
insert();
break;
}
case R.id.btn_update:
{
update();
break;
}
case R.id.btn_delete:
{
delete();
break;
}
}
}
public void clsText(){
txt_hn.setText("");
txt_name.setText("");
txt_age.setText("");
}
public void insert(){
try{
String hn = txt_hn.getText().toString().trim();
String name = txt_name.getText().toString().trim();
String age = txt_age.getText().toString().trim();
if ( hn.equals("") || name.equals("") || age.equals("") ){
return ;
}
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("isAdd","true"));
nameValuePairs.add(new BasicNameValuePair("hn",hn));
nameValuePairs.add(new BasicNameValuePair("name",name));
nameValuePairs.add(new BasicNameValuePair("age",age));
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://locahost/php_set_data.php");//Change IP to you WebServer
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs,"UTF-8"));
httpclient.execute(httppost);
clsText();
}catch(Exception e){
Log.d("log_err", "Error in http connection " + e.toString());
}
}
public void update(){
// Your update algorithm
Toast.makeText(getApplicationContext(), "update",Toast.LENGTH_SHORT).show();
}
public void delete(){
// Your delete algorithm
Toast.makeText(getApplicationContext(), "delete",Toast.LENGTH_SHORT).show();
}
public void select() {
tv_res.setText("");
InputStream is = null;
String js_result = "";
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://locahost/php_get_data.php");
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
} catch (Exception e) {
Log.d("log_err", "Error in http connection " + e.toString());
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"UTF-8"));
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line);
}
is.close();
js_result = sb.toString();
} catch (Exception e) {
Log.e("log_tag", "Error converting result " + e.toString());
}
try {
final JSONArray jArray = new JSONArray(js_result);
for (int i = 0; i < jArray.length(); i++) {
JSONObject jo = jArray.getJSONObject(i);
String hn = jo.getString("hn");
String name = jo.getString("name");
String age = String.valueOf(jo.getInt("age"));
String date_serv = jo.getString("date_serv");
Log.d("log",hn+","+name+","+age+","+date_serv);
tv_res.append(hn+","+name+","+age+","+date_serv+"\n");
}
} catch (JSONException e) {
Log.e("log_tag", "Error parsing data " + e.toString());
}
}
}
activity_main.xml中
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Connect To Mysql Example" />
<EditText
android:id="@+id/txt_hn"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="HN" >
</EditText>
<EditText
android:id="@+id/txt_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Name-Lastname" />
<EditText
android:id="@+id/txt_age"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Age" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<Button
android:id="@+id/btn_insert"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Insert" />
<Button
android:id="@+id/btn_select"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Select" />
<Button
android:id="@+id/btn_update"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Update" />
<Button
android:id="@+id/btn_delete"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Delete" />
</LinearLayout>
<ScrollView
android:id="@+id/scrollView1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/tv_res"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="" />
</LinearLayout>
</ScrollView>
</LinearLayout>
的AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.testsql"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".Main"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
php_set_data.php
<?php
header("content-type:text/javascript;charset=utf-8");
$con=mysql_connect('localhost','root','')or die(mysql_error()); // เปลี่ยน localhost เป็น ip ของ mysql server
mysql_select_db('android')or die(mysql_error());
mysql_query("SET NAMES UTF8");
if (isset($_POST)){
if($_POST['isAdd']=='true'){
$hn=$_POST['hn'];
$name=$_POST['name'];
$age = $_POST['age'];
$date = date('Y-m-d');
$sql="INSERT INTO `patient` (`hn`, `name`, `age`, `date_serv`) VALUES ('$hn', '$name', '$age', '$date')";
mysql_query($sql);
}
}
mysql_close();
?>
php_get_data.php
<?php
header("content-type:text/javascript;charset=utf-8");
$con=mysql_connect('localhost','root','')or die(mysql_error()); // เปลี่ยน localhost เป็น ip ของ mysql server
mysql_select_db('android')or die(mysql_error());
mysql_query("SET NAMES UTF8");
$sql="SELECT * FROM patient";
$res=mysql_query($sql);
while($row=mysql_fetch_assoc($res)){
$output[]=$row;
}
print(json_encode($output));
mysql_close();
?>
这是logcat
答案 0 :(得分:5)
启动应用程序时显示消息&#34;遗憾的是Project Has 停止&#34;
因为您没有在AndroidManifest.xml
中注册MainActivity活动
使用.MainActivity
代替.Main
在MainActivity
注册AndroidManifest.xml
活动:
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<!-- your code here -->
</activity>