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Code Issues Releases Wiki Activity

improve control line example

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This commit is contained in:
kai-morich 2020-07-19 18:31:13 +02:00
parent 8eaf3f5c5f
commit a2f0097092
1 changed files with 24 additions and 18 deletions
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42
usbSerialExamples/src/main/java/com/hoho/android/usbserial/examples/TerminalFragment.java
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@ -289,7 +289,7 @@ public class TerminalFragment extends Fragment implements SerialInputOutputManag
private ToggleButton rtsBtn, ctsBtn, dtrBtn, dsrBtn, cdBtn, riBtn; private ToggleButton rtsBtn, ctsBtn, dtrBtn, dsrBtn, cdBtn, riBtn;
ControlLines(View view) { ControlLines(View view) {
runnable = this::start; // w/o explicit Runnable, a new lambda would be created on each postDelayed, which would not be found again by removeCallbacks runnable = this::run; // w/o explicit Runnable, a new lambda would be created on each postDelayed, which would not be found again by removeCallbacks
rtsBtn = view.findViewById(R.id.controlLineRts); rtsBtn = view.findViewById(R.id.controlLineRts);
ctsBtn = view.findViewById(R.id.controlLineCts); ctsBtn = view.findViewById(R.id.controlLineCts);
@ -317,7 +317,9 @@ public class TerminalFragment extends Fragment implements SerialInputOutputManag
} }
} }
private boolean refresh() { private void run() {
if (!connected)
return;
try { try {
EnumSet<UsbSerialPort.ControlLine> controlLines = usbSerialPort.getControlLines(); EnumSet<UsbSerialPort.ControlLine> controlLines = usbSerialPort.getControlLines();
rtsBtn.setChecked(controlLines.contains(UsbSerialPort.ControlLine.RTS)); rtsBtn.setChecked(controlLines.contains(UsbSerialPort.ControlLine.RTS));
@ -326,33 +328,37 @@ public class TerminalFragment extends Fragment implements SerialInputOutputManag
dsrBtn.setChecked(controlLines.contains(UsbSerialPort.ControlLine.DSR)); dsrBtn.setChecked(controlLines.contains(UsbSerialPort.ControlLine.DSR));
cdBtn.setChecked(controlLines.contains(UsbSerialPort.ControlLine.CD)); cdBtn.setChecked(controlLines.contains(UsbSerialPort.ControlLine.CD));
riBtn.setChecked(controlLines.contains(UsbSerialPort.ControlLine.RI)); riBtn.setChecked(controlLines.contains(UsbSerialPort.ControlLine.RI));
mainLooper.postDelayed(runnable, refreshInterval);
} catch (IOException e) { } catch (IOException e) {
status("getControlLines() failed: " + e.getMessage() + " -> stopped control line refresh"); status("getControlLines() failed: " + e.getMessage() + " -> stopped control line refresh");
return false;
} }
return true;
} }
void start() { void start() {
if (connected) { if (!connected)
try { return;
EnumSet<UsbSerialPort.ControlLine> controlLines = usbSerialPort.getSupportedControlLines(); try {
if (!controlLines.contains(UsbSerialPort.ControlLine.RTS)) rtsBtn.setVisibility(View.INVISIBLE); EnumSet<UsbSerialPort.ControlLine> controlLines = usbSerialPort.getSupportedControlLines();
if (!controlLines.contains(UsbSerialPort.ControlLine.CTS)) ctsBtn.setVisibility(View.INVISIBLE); if (!controlLines.contains(UsbSerialPort.ControlLine.RTS)) rtsBtn.setVisibility(View.INVISIBLE);
if (!controlLines.contains(UsbSerialPort.ControlLine.DTR)) dtrBtn.setVisibility(View.INVISIBLE); if (!controlLines.contains(UsbSerialPort.ControlLine.CTS)) ctsBtn.setVisibility(View.INVISIBLE);
if (!controlLines.contains(UsbSerialPort.ControlLine.DSR)) dsrBtn.setVisibility(View.INVISIBLE); if (!controlLines.contains(UsbSerialPort.ControlLine.DTR)) dtrBtn.setVisibility(View.INVISIBLE);
if (!controlLines.contains(UsbSerialPort.ControlLine.CD)) cdBtn.setVisibility(View.INVISIBLE); if (!controlLines.contains(UsbSerialPort.ControlLine.DSR)) dsrBtn.setVisibility(View.INVISIBLE);
if (!controlLines.contains(UsbSerialPort.ControlLine.RI)) riBtn.setVisibility(View.INVISIBLE); if (!controlLines.contains(UsbSerialPort.ControlLine.CD)) cdBtn.setVisibility(View.INVISIBLE);
} catch (IOException e) { if (!controlLines.contains(UsbSerialPort.ControlLine.RI)) riBtn.setVisibility(View.INVISIBLE);
Toast.makeText(getActivity(), "getSupportedControlLines() failed: " + e.getMessage(), Toast.LENGTH_SHORT).show(); run();
} } catch (IOException e) {
if (refresh()) Toast.makeText(getActivity(), "getSupportedControlLines() failed: " + e.getMessage(), Toast.LENGTH_SHORT).show();
mainLooper.postDelayed(runnable, refreshInterval);
} }
} }
void stop() { void stop() {
mainLooper.removeCallbacks(runnable); mainLooper.removeCallbacks(runnable);
rtsBtn.setChecked(false);
ctsBtn.setChecked(false);
dtrBtn.setChecked(false);
dsrBtn.setChecked(false);
cdBtn.setChecked(false);
riBtn.setChecked(false);
} }
} }
} }