我正在使用切换按钮，所以当它打开时它应该发送一个特定的字符串，当它关闭时它应该发送另一个字符串。我发布了我的代码和日志cat。所有ip地址和端口都在程序中配置和提及，还有什么需要在此代码中添加.................. .................................................. .................................................. .................................................. .................................................. .................................................. ................................................. < / p>
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;
import android.widget.ToggleButton;
import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
private Socket client;
private PrintWriter printwriter;
private ToggleButton toggleButton1;
private String messsage;
int port = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toggleButton1 = (ToggleButton) findViewById(R.id.toggleButton1);
toggleButton1.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if (toggleButton1.isChecked()) {
messsage = "TV ON";
Log.d("On", "Button On" + messsage);
new Thread(new Runnable() {
public void run() {
// TODO Auto-generated method stub
try {
// client = new
// Socket(etIP.getText().toString(), port);
client = new Socket("192.168.4.1", 100);
printwriter = new PrintWriter(client
.getOutputStream(), true);
printwriter.write(messsage);
printwriter.flush();
printwriter.close();
client.close();
}
catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}).start();
} else {
messsage = "TV OFF";
Log.d("off", "Button off " + messsage);// etMsg.getText().toString();
// etMsg.setText("");
// port = Integer.parseInt(etPort.getText().toString());
new Thread(new Runnable() {
public void run() {
// TODO Auto-generated method stub
try {
// client = new
// Socket(etIP.getText().toString(), port);
client = new Socket("192.168.4.1", 100);
printwriter = new PrintWriter(client
.getOutputStream(), true);
printwriter.write(messsage);
printwriter.flush();
printwriter.close();
client.close();
}
catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}).start();
}
}
});
new Thread(new Runnable() {
public void run() {
// TODO Auto-generated method stub
try {
// client = new Socket(etIP.getText().toString(), port);
client = new Socket("192.168.4.1", 100);
printwriter = new PrintWriter(client.getOutputStream(),
true);
printwriter.write(messsage);
printwriter.flush();
printwriter.close();
client.close();
}
catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}).start();
}
log cat：
05-14 01:08:33.494 8293-8293/? D/off﹕ Button off TV OFF
05-14 01:08:33.494 8293-11491/? W/System.err﹕ java.net.SocketException: socket failed: EACCES (Permission denied)
05-14 01:08:33.494 8293-11491/? W/System.err﹕ at libcore.io.IoBridge.socket(IoBridge.java:623)
05-14 01:08:33.494 8293-11491/? W/System.err﹕ at java.net.PlainSocketImpl.create(PlainSocketImpl.java:198)
05-14 01:08:33.494 8293-11491/? W/System.err﹕ at java.net.Socket.startupSocket(Socket.java:582)
05-14 01:08:33.494 8293-11491/? W/System.err﹕ at java.net.Socket.tryAllAddresses(Socket.java:128)
05-14 01:08:33.494 8293-11491/? W/System.err﹕ at java.net.Socket.<init>(Socket.java:178)
05-14 01:08:33.494 8293-11491/? W/System.err﹕ at java.net.Socket.<init>(Socket.java:150)
05-14 01:08:33.494 8293-11491/? W/System.err﹕ at com.example.lenovo.send.MainActivity$1$2.run(MainActivity.java:80)
05-14 01:08:33.494 8293-11491/? W/System.err﹕ at java.lang.Thread.run(Thread.java:818)
05-14 01:08:33.494 8293-11491/? W/System.err﹕ Caused by: android.system.ErrnoException: socket failed: EACCES (Permission denied)
05-14 01:08:33.494 8293-11491/? W/System.err﹕ at libcore.io.Posix.socket(Native Method)
05-14 01:08:33.494 8293-11491/? W/System.err﹕ at libcore.io.BlockGuardOs.socket(BlockGuardOs.java:282)
05-14 01:08:33.494 8293-11491/? W/System.err﹕ at libcore.io.IoBridge.socket(IoBridge.java:608)
05-14 01:08:33.494 8293-11491/? W/System.err﹕ ... 7 more
05-14 01:08:33.574 1950-2083/? I/art﹕ Explicit concurrent mark sweep GC freed 10727(462KB) AllocSpace objects, 0(0B) LOS objects, 40% free, 17MB/28MB, paused 3.913ms total 80.446ms
05-14 01:08:33.574 973-1185/? W/AudioTrack﹕ AUDIO_OUTPUT_FLAG_FAST denied by client
05-14 01:08:33.584 326-6000/? E/AudioPolicyManager﹕ unknown stream type
05-14 01:08:33.584 326-6000/? E/AudioPolicyManager﹕ unknown stream type
05-14 01:08:33.584 326-6000/? E/AudioPolicyManager﹕ unknown stream type
05-14 01:08:33.584 326-6000/? E/AudioPolicyManager﹕ unknown stream type
05-14 01:08:33.584 326-6000/? E/AudioPolicyManager﹕ unknown stream type
05-14 01:08:33.584 326-6000/? E/AudioPolicyManager﹕ unknown stream type
05-14 01:08:33.584 326-6000/? E/AudioPolicyManager﹕ unknown stream type
05-14 01:08:33.594 326-1158/? D/audio_hw_primary﹕ out_set_parameters: enter: usecase(1: low-latency-playback) kvpairs: routing=2
05-14 01:08:33.594 326-6000/? E/AudioPolicyManager﹕ unknown stream type
05-14 01:08:33.594 326-6000/? I/AudioFlinger﹕ setAppName(), name=[system_server], active=[1]
05-14 01:08:33.624 326-1187/? I/AudioFlinger﹕ setAppName(), name=[system_server], active=[0]
答案 0 :(得分：0)
你在AndroidManifest.xml中添加了所需的权限吗？
通过查看此refrence，必须添加以下权限：
<uses-permission android:name="android.permission.INTERNET" >
</uses-permission>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" >
</uses-permission>