我的应用程序允许用户命名和添加项目,然后生成一个文本文件(尚未编码)。例如,如果他们添加名为“冰箱”的项目,那么它会生成fridge.txt。当这个项目被添加时,它也被添加到一个ArrayList中,并传递给我的微调器。所以冰箱现在也可以在微调器中看到。我需要实现的是,当用户从微调框中选择一个项目时,它还会从生成的文本文件中的文本视图中显示数据。我的问题是,如果我不知道用户如何命名该项目,我该怎么做?我有一个条件,检查微调框的值是否等于一个字符串,但因为用户将命名他们自己的项目我怎么让我的微调框做一些事情时,一个项目被选中?检查从微调框中选择的项目
public class MainActivity extends AppCompatActivity {
String statusLink = "http://redacted.uk/pmt/status.txt";
String deviceLink = "http://redacted.uk/pmt/devices.txt";
String status;
final String degree = "\u00b0";
ArrayList<String> devicesAL = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Thread thread = new Thread(new Runnable() {
@Override
public void run() {
try {
// Set up connection to device.txt on web server
URL deviceUrl = new URL (deviceLink);
URLConnection deviceConn = deviceUrl.openConnection();
deviceConn.setDoOutput(true);
deviceConn.connect();
InputStream dis = deviceConn.getInputStream();
InputStreamReader disr = new InputStreamReader(dis, "UTF-8");
BufferedReader dbr = new BufferedReader(disr);
String deviceLine;
// Set up connection to status.txt on web server
URL statusUrl = new URL(statusLink);
URLConnection statusConn = statusUrl.openConnection();
statusConn.setDoOutput(true);
statusConn.connect();
InputStream sis = statusConn.getInputStream();
InputStreamReader sisr = new InputStreamReader(sis, "UTF-8");
BufferedReader sbr = new BufferedReader(sisr);
String statusLine;
try {
while ((deviceLine = dbr.readLine()) != null) {
//System.out.println(deviceLine);
devicesAL.add(deviceLine);
for (String str : devicesAL) {
System.out.println(str);
}
}
while ((statusLine = sbr.readLine()) != null) {
System.out.println(statusLine);
status = statusLine;
System.out.println("Status = " + status);
TextView output = (TextView) findViewById(R.id.textView);
System.out.println(status);
}
for (String str : devicesAL) {
System.out.println(str);
}
runOnUiThread(new Runnable() {
@Override
public void run() {
//LOAD SPINNER
Spinner spinner = (Spinner) findViewById(R.id.spinner);
ArrayAdapter adp = new ArrayAdapter(MainActivity.this, android.R.layout.simple_spinner_item, devicesAL);
adp.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adp);
adp.notifyDataSetChanged();
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
TextView output = (TextView) findViewById(R.id.textView);
if (parent.getItemAtPosition(position).equals("Water Cooler")) {
System.out.println("Water cooler selected");
output.setText(status);
}
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
});
} finally {
sbr.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}
});
thread.start();
}
}