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私はC++の恋人ですが、私の大学の割り当てにはAndroid（Java）、Web（PHP）、Arduinoをコードする必要があります。 Java。私はAndroid、PHPとArduinoの間でHTTP POSTを使って通信しようとしています
私は少なくともAndroidのコードを試しましたが、コンパイルされないと言われています。理由は分かりません。
（ああ、私は韓国の大学に行って、私は韓国の大学に行きたいと思っています。私のプログラムでは韓国語）。
package ---my package---;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.RequiresApi;
import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import static android.graphics.Color.GREEN;
import static android.graphics.Color.RED;
public class MainActivity extends AppCompatActivity {
Button mp3_1, mp3_2, mp3_3, mp3_4, finishbutton;
TextView wakeornot;
char datatosend;
String datareceived;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
wakeornot = (TextView) findViewById(R.id.wakeornot);
mp3_1 = (Button) findViewById(R.id.mp3_1);
mp3_2 = (Button) findViewById(R.id.mp3_2);
mp3_3 = (Button) findViewById(R.id.mp3_3);
mp3_4 = (Button) findViewById(R.id.mp3_4);
finishbutton = (Button) findViewById(R.id.finishbutton);
mp3_1.setOnClickListener(new View.OnClickListener() {
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
@Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "1번 자장가를 재생합니다", Toast.LENGTH_SHORT).show();
datatosend = '1';
HttpPostData();
}});
mp3_2.setOnClickListener(new View.OnClickListener() {
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
@Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "2번 자장가를 재생합니다", Toast.LENGTH_SHORT).show();
datatosend = '2';
HttpPostData();
}});
mp3_3.setOnClickListener(new View.OnClickListener() {
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
@Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "3번 자장가를 재생합니다", Toast.LENGTH_SHORT).show();
datatosend = '3';
HttpPostData();
}});
mp3_4.setOnClickListener(new View.OnClickListener() {
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
@Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "4번 자장가를 재생합니다", Toast.LENGTH_SHORT).show();
datatosend = '4';
HttpPostData();
}});
finishbutton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "프로그램을 종료합니다", Toast.LENGTH_SHORT).show();
finish();
}});
}
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
public void HttpPostData() {
try {
//URL 설정 및 접속
URL url = new URL("https://---domain---.net");
HttpsURLConnection http = (HttpsURLConnection) url.openConnection();
//전송 모드 설정
http.setDefaultUseCaches(false);
http.setDoInput(true); // 서버에서 읽기 모드 지정
http.setDoOutput(true); // 서버로 쓰기 모드 지정
http.setRequestMethod("POST"); // 전송 방식은 POST
http.setRequestProperty("content-type", "application/x-www-form-urlencoded");
//서버로 값 전송
StringBuffer buffer;
buffer = new StringBuffer();
buffer.append("datatosend").append("=").append(datatosend);
OutputStreamWriter outStream = new OutputStreamWriter(http.getOutputStream(), "EUC-KR");
PrintWriter writer = new PrintWriter(outStream);
writer.write(buffer.toString());
writer.flush();
//서버에서 전송 받기
InputStreamReader tmp = new InputStreamReader(http.getInputStream(), "EUC-KR");
BufferedReader reader = new BufferedReader(tmp);
StringBuilder builder = new StringBuilder();
String str;
while ((str = reader.readLine()) != null) { // 서버에서 라인단위로 보내줄 것이므로 라인단위로 읽는다
builder.append(str).append("\n"); // View에 표시하기 위해 라인 구분자 추가
}
datareceived = builder.toString(); // 전송결과를 전역 변수에 저장
if (datareceived.equals("5")) {
datareceived = "! 깨어 !";
((TextView)(findViewById(R.id.wakeornot))).setText(datareceived);
((TextView)(findViewById(R.id.wakeornot))).setTextColor(RED);
Toast.makeText(MainActivity.this, "아기의 상태에 변화가 있습니다", Toast.LENGTH_SHORT).show();
}
else if (datareceived.equals("6")) {
datareceived = "자고";
((TextView)(findViewById(R.id.wakeornot))).setText(datareceived);
((TextView)(findViewById(R.id.wakeornot))).setTextColor(GREEN);
Toast.makeText(MainActivity.this, "아기의 상태에 변화가 있습니다", Toast.LENGTH_SHORT).show();
}
} catch (IOException e) {
//
} // try
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}