Styjun

I'm particularly interested in high contrast text, color correction, and magnification settings. I did some research online, couldn't find what I want. I saw one answer about detecting high contrast text:

AccessibilityManager am = (AccessibilityManager) this.getSystemService(Context.ACCESSIBILITY_SERVICE);
boolean isHighTextContrastEnabled = am.isHighTextContrastEnabled();

But somehow it gives me the error for isHighTextContrastEnabled() saying that it is undefined for the type AccessibilityManager.

Also didn't find solution for the other two settings detection.

 AccessibilityManager am = (AccessibilityManager) this.getSystemService(Context.ACCESSIBILITY_SERVICE);

 Class clazz = am.getClass();
 Method m = null;
 try 
 m = clazz.getMethod("isHighTextContrastEnabled",null);
 catch (NoSuchMethodException e) 
 Log.w("FAIL", "isHighTextContrastEnabled not found in AccessibilityManager");
 


 Object result = null;
 try 
 result = m.invoke(am, null);
 if (result != null && result instanceof Boolean) 
 Boolean b = (Boolean)result;
 Log.d("result", "b =" + b);
 
 catch (Exception e) 
 android.util.Log.d("fail", "isHighTextContrastEnabled invoked with an exception" + e.getMessage());
 return;
 

and I do test, it return false, so it works

use this for color correction:

int color_correction_enabled = 0;

try
color_correction_enabled = Settings.Secure.getInt(this.getContentResolver(), "accessibility_display_daltonizer_enabled");

catch (Exception e)

color_correction_enabled = 0; // means default false

What a did was

private fun checkForAcessibility(): Boolean 
 try 
 val accessibilityManager = context.getSystemService(Context.ACCESSIBILITY_SERVICE) as AccessibilityManager
 val accessibilityManagerClass = accessibilityManager.javaClass
 val isHighTextContrastEnabledMethod = accessibilityManagerClass.getMethod("isHighTextContrastEnabled")
 val result: Any = isHighTextContrastEnabledMethod.invoke(accessibilityManager) ?: return AccessibilityEnabledValue.ERROR_QUERYING_VALUE

 if (result !is Boolean) 
 return AccessibilityEnabledValue.ERROR_QUERYING_VALUE
 

 return if (result) 
 AccessibilityEnabledValue.TRUE
 else 
 AccessibilityEnabledValue.FALSE
 
 catch (e: Exception) 
 return AccessibilityEnabledValue.ERROR_QUERYING_VALUE
 





enum class AccessibilityEnabledValue(val value: String) 
 TRUE("true"),
 FALSE("false"),
 ERROR_QUERYING_VALUE("error_querying_value")

I've noticed that isHighTextContrastEnabled() method does not contain parameters.