android多线程，在方法中执行

2024年5月3日 互联网

主类：

package com.example.thread_1;import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;public class MainActivity extends Activity {private Handler handler;private Button button1;private String result1 = null, result2 = null;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);button1 = (Button) findViewById(R.id.button1);final RunClass runClass = new RunClass();button1.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO 自动生成的方法存根Run1();// //桐城市Run2();// /舒城runClass.RunThread3();// /巢湖runClass.RunThread4();// /庐江}});handler = new Handler() {@Overridepublic void handleMessage(Message msg) {// TODO 自动生成的方法存根// super.handleMessage(msg);if (result1 != null) {Log.i("result1", result1);}}};}// /onCreatepublic void Run1() {new Thread(new Runnable() {@Overridepublic void run() {// TODO 自动生成的方法存根send1();Message m = new Message();handler.sendMessage(m);}}).start();}
///private void send1() {// TODO 自动生成的方法存根 桐城市String target1 = "http://api.map.baidu.com/geocoder?output=json&location=31,117&key=GlFh.......";URL url1;try {url1 = new URL(target1);HttpURLConnection conn1 = (HttpURLConnection) url1.openConnection();BufferedReader buffer1 = new BufferedReader(new InputStreamReader(conn1.getInputStream()));String inputLine1 = null;while ((inputLine1 = buffer1.readLine()) != null) {result1 += inputLine1 + "\n";}} catch (MalformedURLException e) {// TODO 自动生成的 catch 块e.printStackTrace();} catch (IOException e) {// TODO 自动生成的 catch 块e.printStackTrace();}}// /sendpublic void Run2() {new Thread(new Runnable() {@Overridepublic void run() {// TODO 自动生成的方法存根 舒城String target2 = "http://api.map.baidu.com/geocoder?output=json&location=31.3,117&key=GlFh......";URL url2;try {url2 = new URL(target2);HttpURLConnection conn2 = (HttpURLConnection) url2.openConnection();BufferedReader buffer2 = new BufferedReader(new InputStreamReader(conn2.getInputStream()));String inputLine2 = null;while ((inputLine2 = buffer2.readLine()) != null) {result2 += inputLine2 + "\n";}Log.i("result2", result2);//// in_2.close();// conn_2.disconnect();} catch (MalformedURLException e) {// TODO 自动生成的 catch 块e.printStackTrace();} catch (IOException e) {// TODO 自动生成的 catch 块e.printStackTrace();}}}).start();}}

另一个类：

<pre name="code" class="java">package com.example.thread_1;import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;import android.app.Activity;
import android.os.Message;
import android.util.Log;public class RunClass extends Activity {private String result3 = null, result4 = null;public void RunThread3() {new Thread(new Runnable() {@Overridepublic void run() {// TODO 自动生成的方法存根send3();//Message m = new Message();//handler.sendMessage(m);}}).start();}///private void send3() {// TODO 自动生成的方法存根巢湖市String target3 = "http://api.map.baidu.com/geocoder?output=json&location=31.9,117.8&key=Gl.....";需要自己申请URL url3;try {url3 = new URL(target3);HttpURLConnection conn3= (HttpURLConnection) url3.openConnection();BufferedReader buffer3 = new BufferedReader(new InputStreamReader(conn3.getInputStream()));String inputLine3 = null;while ((inputLine3 = buffer3.readLine()) != null) {result3 += inputLine3 + "\n";}Log.i("result3", result3);//// in_2.close();// conn_2.disconnect();} catch (MalformedURLException e) {// TODO 自动生成的 catch 块e.printStackTrace();} catch (IOException e) {// TODO 自动生成的 catch 块e.printStackTrace();}}// /send_2public void RunThread4() {new Thread(new Runnable() {@Overridepublic void run() {// TODO 自动生成的方法存根//send_3();//Message m = new Message();//handler.sendMessage(m);// TODO 自动生成的方法存根    庐江县String target4 = "http://api.map.baidu.com/geocoder?output=json&location=31.45,117.24&key=GlF.....";URL url4;try {url4 = new URL(target4);HttpURLConnection conn4 = (HttpURLConnection) url4.openConnection();BufferedReader buffer4 = new BufferedReader(new InputStreamReader(conn4.getInputStream()));String inputLine4 = null;while ((inputLine4 = buffer4.readLine()) != null) {result4 += inputLine4 + "\n";}Log.i("result4", result4);//// in_2.close();// conn_2.disconnect();} catch (MalformedURLException e) {// TODO 自动生成的 catch 块e.printStackTrace();} catch (IOException e) {// TODO 自动生成的 catch 块e.printStackTrace();}}}).start();}///}




 加上网权限：    




 <uses-sdkandroid:minSdkVersion="15"android:targetSdkVersion="16" /><uses-permission android:name="android.permission.INTERNET"/>


结果：结果有四个，这里只写出一个了，


 



            

            

        

        

            
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