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Je suis un amant C++, mais mon devoir d'université me demande de coder Android (Java), web (PHP) et Arduino, et je n'ai aucune expérience dans Java. Je ai au moins essayé pour le code Android, mais il dit qu'il ne compilera pas, et je ne comprends pas pourquoi. Je reçois beaucoup d'erreurs "class, interface, ou enum expected" et je ne peux tout simplement pas le trouver partout,J'essaie de communiquer entre Android, PHP et Arduino via HTTP POST
(Oh, et s'il vous plaît ignorer coréen, je vais à l'université coréenne, et mon professeur veut que je comprenne Coréen dans mon programme).
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);
}
}