android获取php简单数据

最新推荐文章于 2021-03-28 21:17:38 发布

原创最新推荐文章于 2021-03-28 21:17:38 发布 · 5.9k 阅读

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#android4.0 #network #线程 #数据

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本文详细介绍了Android应用程序如何通过HTTP客户端获取PHP数据的步骤，包括加入必要的权限、启动新线程、注意URL设置以及通过Handler将数据从新线程中传递回主线程的方法。

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一 android获取php数据
步骤：
1 加入权限：
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

2启动一个新线程
android4.0开始不允许直接在ui线程直接操作httpClient

3 注意url:http://10.0.2.2/testAndroid.php
(不要填写:127.0.0.1 这个是本机电脑的,模拟器有自己的默认ip)

4通过handler将数据从新线程中传送出来

MainActivity.java======================

public class MainActivity extends Activity {

public final static String EXTRA_MESSAGE = "com.example.myapp.MESSAGE";
HttpClient client;
public String res;
public Handler myHandler;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

myHandler = new Handler(){
public void handleMessage(Message msg){
if(msg.what == 0x123){
Toast toast = Toast.makeText(MainActivity.this,msg.obj.toString(),Toast.LENGTH_SHORT);
toast.show();
}
}
};
}
public void sendMessage(View view) {
startUrlCheck();

}

private void startUrlCheck()
{
new Thread(){
public void run(){
client = new DefaultHttpClient();
StringBuilder builder = new StringBuilder();
HttpGet myget = new HttpGet("http://10.0.2.2/testAndroid.php");
//HttpGet myget = new HttpGet("http://www.crazyit.org");
try {
HttpResponse response = client.execute(myget);
HttpEntity entity = response.getEntity();
BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent()));
for (String s = reader.readLine(); s != null; s = reader.readLine()) {
builder.append(s);
}
JSONObject jsonObject = new JSONObject(builder.toString());
String re_password = jsonObject.getString("password");
res = re_password;
Message msg = new Message();
msg.what = 0x123;
msg.obj = res;
myHandler.sendMessage(msg);

} catch (Exception e) {
e.printStackTrace();
}
}
}.start();
}
}

testAndroid.php===================================

<?php
$array = array(
'username'=>'杨铸',
'password'=>'123456',
'user_id'=>1
);
echo json_encode($array);
?>