android studio 53 mp3

package com.example.mydownloadmusic01;import android.annotation.SuppressLint;import android.os.Handler;import android.os.Message;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.Button;import android.widget.EditText;import android.widget.ListView;import android.widget.TextView;import android.widget.Toast;import androidx.appcompat.app.AppCompatActivity;import java.io.InputStream;import java.io.OutputStream;import java.net.Socket;public class MainActivity extends AppCompatActivity {    TextView tv;    ListView ls;    Button btn;    EditText edt;    String NeedFindWords;    private final int HANDLER_MSG_TELL_RECV = 0x124;    @SuppressLint("HandlerLeak")    Handler handler = new Handler(){        public void handleMessage(Message msg){            //接受到服务器信息时执行//            Toast.makeText(MainActivity.this,(msg.obj).toString(),Toast.LENGTH_LONG).show();//            tv.setText((msg.obj).toString());            System.out.println((msg.obj).toString());            String[] strArr = (msg.obj).toString().split("\n");            ArrayAdapter<String> arrayAdapter= new ArrayAdapter<String> (                    MainActivity.this, android.R.layout.simple_list_item_1,strArr);            ls.setAdapter(arrayAdapter);        }    };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Button btn = findViewById(R.id.button);        edt=(EditText)findViewById(R.id.editText);        ls= (ListView) findViewById(R.id.ListName);        ls.setOnItemClickListener(new AdapterView.OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {                System.out.println(id);                Toast.makeText(MainActivity.this,"rrrrrrrrrrrrrrrrrr",Toast.LENGTH_LONG).show();            }        });//        tv= (TextView) findViewById(R.id.ReData);        btn.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                // 响应事件                NeedFindWords=edt.getText().toString();                startNetThread();            }        });    }    private void startNetThread() {        new Thread() {            @Override            public void run() {                try {                    Socket socket = new Socket("192.168.43.8", 666);                    InputStream is = socket.getInputStream();                    OutputStream out = socket.getOutputStream();                    out.write(NeedFindWords.getBytes());//3.发送                    out.flush();                    byte[] bytes = new byte[1024];                    int n = is.read(bytes);                    Message msg = handler.obtainMessage(HANDLER_MSG_TELL_RECV, new String(bytes, 0, n));                    msg.sendToTarget();                    is.close();                    socket.close();                } catch (Exception e) {                }            }        }.start();    }    }
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