關於安卓通過網路介面解析Json資料的簡單實現
1 MainActivity.java
package com.example.ms18.finalexam_2_20150861213;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.IOException;
public class MainActivity extends AppCompatActivity {
private TextView textView;
private EditText editText;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView = (TextView)this.findViewById(R.id.tv);
editText = (EditText)this.findViewById(R.id.editId);
}
private Handler handler = new Handler(){
public void handleMessage(Message msg){
super.handleMessage(msg);
String data=(String)msg.obj;
getJson(data);
}
};
public void btnLook(View view){
new Thread(runnable).start();
}
public void getJson(String data){
String[] datas = data.split("",2);
for(String s:datas){
System.out.println("2111111111111111111111111111");
System.out.println(s);
}
String newDtas = datas[1].substring(0,datas[1].lastIndexOf(""));
// String weather1 = "["+newDtas+"]";
//如果獲取到的json是資料，就直接用，如果不是，就拼接[]，成為json陣列後再使用。
String weather1 = newDtas;
System.out.println("2111111111111111111111111111");
System.out.println(newDtas);
System.out.println(newDtas);
try{
JSONArray array = new JSONArray(weather1);
for(int i =0; i<array.length();i++){
System.out.println(array.length());
JSONObject jsonObject = array.getJSONObject(i);
String op = jsonObject.getString("op");
String m = jsonObject.getString("m");
String id = jsonObject.getString("id");
String p= jsonObject.getString("p");
System.out.println("2333333333333333");
System.out.println("op:"+op +"m:"+m+"id:"+id+"p"+p);
textView.setText("op:"+op +" m:"+m+" id:"+id+" p"+p);
}
}
catch(JSONException e){
System.out.println(e.getMessage());
e.printStackTrace();
}
}
private Runnable runnable = new Runnable() {
@Override
public void run() {
try {
Message msg = new Message();
StreamTools streamTools = new StreamTools();
String id = editText.getText().toString();
System.out.println(id);
String urls="http://p.3.cn/prices/mgets?skuIds=J_"+id+"&type=1";
//String urls=" http://pv.sohu.com/cityjson?ie=utf-8";
String data = streamTools.getDataFromNetWork(urls);
msg.obj = data;
handler.sendMessage(msg);
}
catch (IOException e){
e.printStackTrace();
}
}
};
}
2 StreamTools.java
package com.example.ms18.finalexam_2_20150861213;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
/**
* Created by ms28 on 2017-6-21.
*/
public class StreamTools {
public String getDataFromNetWork(String uri)throws IOException{
String data="";
URL url =new URL(uri);
HttpURLConnection connection=(HttpURLConnection)url.openConnection();
connection.setConnectTimeout(4000);
connection.setRequestMethod("GET");
int code = connection.getResponseCode();
if(code==200){
InputStream inputStream = connection.getInputStream();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buf = new byte[1024];
int length;
length = inputStream.read(buf);
while (length>-1){
baos.write(buf,0,length);
length = inputStream.read(buf);
}
data = baos.toString();
inputStream.close();
baos.close();
baos.flush();
}
return data;
}
}
一 activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.ms18.finalexam_2_20150861213.MainActivity">
<TextView
android:id="@+id/tt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="輸入IP:" />
<EditText
android:layout_width="300dp"
android:layout_height="wrap_content"
android:id="@+id/editId"
android:layout_below="@+id/tt"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/btnLook"
android:onClick="btnLook"
android:text="檢視"
android:layout_below="@id/editId"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tv"
android:layout_below="@id/btnLook"/>
</RelativeLayout>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.ms18.finalexam_2_20150861213">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.INTERNET"/>
</manifest>