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私は書いているプログラムに簡単なコードを投稿します。ここに私の質問です。私は私のサーバーに接続していると思います。（これは私がこのオンラインで投稿しているので私は偽のサーバーアドレスに置き換えます）、私は実際にサーバーに変数を送信しているかどうかを知りたいと思います。私はこの文字列（ "？systemid = demo & pwd = demo &理由= do％20something & qnumber = A36"）を使用してPHPサーバーにデータを送信しています。これはテスト目的のためにハードコードされています。私の質問は、私は実際にデータを送信していますか？ send（）メソッドがないようです。私の無知を許してください。私はAndroidが初めてです。サーバーへのデータの送信
私はOutputStreamに書き込むときにもデータを送信していると私は考えました。
public class PrintTicketActivity extends AppCompatActivity {
private static final String TAG2 = "PrintTicketActivity";
Context mContext;
Button mButtonA, mButtonB, mButtonC, mButtonD, mButtonE, mButtonF;
List<Button> mButtons;
List<PrintJob> mPrintJobs;
WebView mWebView;
int printJobNum = 1;
// here i'm initializing the variables with an arbitrary value so the compiler won't complain
// that they may have not been initialized in the button's onclick listeners
// these values are overwritten from sharedPreferences anyway.....the file will always exist unless there is a major problem
int numA, numB, numC, numD, numE, numF;
String buttonA, buttonB, buttonC, buttonD, buttonE, buttonF;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_print_ticket);
mContext = this;
mButtons = new ArrayList<>();
mPrintJobs = new ArrayList<>();
mButtonA = (Button) findViewById(R.id.button_a);
mButtonB = (Button) findViewById(R.id.button_b);
mButtonC = (Button) findViewById(R.id.button_c);
mButtonD = (Button) findViewById(R.id.button_d);
mButtonE = (Button) findViewById(R.id.button_e);
mButtonF = (Button) findViewById(R.id.button_f);
// add the buttons to the list so we can check later to see if any of the buttons has empty text
// and then hide the button if it is empty
mButtons.add(mButtonA);
mButtons.add(mButtonB);
mButtons.add(mButtonC);
mButtons.add(mButtonD);
mButtons.add(mButtonE);
mButtons.add(mButtonF);
// check for the start up file
File file = new File("data/data/com.myDomain.myProgram/shared_prefs/start.xml");
if (file.exists()) {
// place text from preferences on the buttons
updateUI();
} else {
Toast.makeText(mContext, "Something went wrong", Toast.LENGTH_SHORT).show();
}
mButtonA.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
executeQueue(NUMBER_A, numA, "A", mButtonA);
new SendQueueToServer().execute();
}
});
mButtonB.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
executeQueue(NUMBER_B, numB, "B", mButtonB);
}
});
mButtonC.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
executeQueue(NUMBER_C, numC, "C", mButtonC);
}
});
mButtonD.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
executeQueue(NUMBER_D, numD, "D", mButtonD);
}
});
mButtonE.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
executeQueue(NUMBER_E, numE, "E", mButtonE);
}
});
mButtonF.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
executeQueue(NUMBER_F, numF, "F", mButtonF);
}
});
}
private void executeQueue(String prefKey, int num, String category, Button button) {
printTicket(button.getText().toString(), category + num);
// increment the number after printing the ticket
++num;
// update the number in the shared preferences
SharedPreferences.Editor editor = getSharedPreferences(MY_PREFS, MODE_PRIVATE).edit();
editor.putInt(prefKey, num);
editor.apply();
// update the UI to get an updated version of the queue number
updateUI();
}
private void updateUI() {
SharedPreferences preferences = getSharedPreferences(MY_PREFS, MODE_PRIVATE);
buttonA = preferences.getString(A, "");
buttonB = preferences.getString(B, "");
buttonC = preferences.getString(C, "");
buttonD = preferences.getString(D, "");
buttonE = preferences.getString(E, "");
buttonF = preferences.getString(F, "");
numA = preferences.getInt(NUMBER_A, 1);
numB = preferences.getInt(NUMBER_B, 1);
numC = preferences.getInt(NUMBER_C, 1);
numD = preferences.getInt(NUMBER_D, 1);
numE = preferences.getInt(NUMBER_E, 1);
numF = preferences.getInt(NUMBER_F, 1);
mButtonA.setText(buttonA);
mButtonB.setText(buttonB);
mButtonC.setText(buttonC);
mButtonD.setText(buttonD);
mButtonE.setText(buttonE);
mButtonF.setText(buttonF);
// if a button doesn't have anything assigned to it, hide the button
for (Button button : mButtons) {
if (button.getText().equals("")) {
button.setVisibility(View.GONE);
}
}
}
private void printTicket(String queueTitle, String queueCategory) {
// create a WebView object for printing
WebView webView = new WebView(mContext);
webView.setWebViewClient(new WebViewClient() {
public boolean shouldOverrideUrlLoading(WebView view, String url) {
return false;
}
@Override
public void onPageFinished(WebView view, String url) {
Log.i(TAG2, "page finished loading " + url);
createWebPrintJob(view);
mWebView = null;
}
});
String html = "<html><body><h2 style=\"text-align:center;font-size:60px\">" + queueTitle + "</h2><h1 style=\"text-align:center" +
";font-size:200px\">" +
queueCategory + "</h1>";
webView.loadDataWithBaseURL(null, html, "text/HTML", "UTF-8", null);
// Keep a reference to WebView object until you pass the PrintDocumentAdapter
// to the PrintManager
mWebView = webView;
}
@SuppressWarnings("deprecation")
private void createWebPrintJob(WebView webView) {
PrintManager printManager = (PrintManager) mContext.getSystemService(Context.PRINT_SERVICE);
// Get a print adapter instance
PrintDocumentAdapter printAdapter;
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
printAdapter = webView.createPrintDocumentAdapter("print_job_num" + printJobNum);
printJobNum++;
} else {
printAdapter = webView.createPrintDocumentAdapter();
printJobNum++;
}
// Create a print job with name and adapter instance
String jobName = getString(R.string.app_name) + " Document";
PrintJob printJob = printManager.print(jobName, printAdapter,
new PrintAttributes.Builder().build());
// save for status checking later
mPrintJobs.add(printJob);
}
@Override
protected void onResume() {
super.onResume();
updateUI();
}
// @Override
// public void onBackPressed() {
// // don't add superclass constructor
// // I am disabling the back button here
// }
private class SendQueueToServer extends AsyncTask<String, String, String> {
@Override
protected String doInBackground(String... params) {
OutputStream out = null;
String urlParameters = "?systemid=demo&pwd=demo&reason=do%20something&qnumber=A36";
HttpsURLConnection connection = null;
try {
URL url = new URL("https://www.example.com/php");
connection = (HttpsURLConnection) url.openConnection();
connection.setRequestMethod("POST");
connection.setDoOutput(true);
connection.connect();
out = new DataOutputStream(connection.getOutputStream());
BufferedWriter writer = new BufferedWriter(
new OutputStreamWriter(out, "UTF-8"));
writer.write(urlParameters);
writer.flush();
writer.close();
Log.d(TAG2, " and the response is: " + connection.getResponseMessage());
Log.d(TAG2, "you are connected and good to go");
} catch (IOException e) {
e.printStackTrace();
} finally {
assert connection != null;
connection.disconnect();
}
return null;
}
}
}