Fixed Android mode

Author: Stefterv

app/src/processing/app/Platform.java

@@ -577,18 +577,25 @@ static public boolean deleteFile(File file) throws IOException {
 
   // . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
 
+  /**
+   * These methods were refactored to use the Preferences system instead of
+   * actual environment variables, since modifying environment variables at runtime
+   * proved problematic. This approach provides similar functionality
+   * while being compatible with various platforms and execution environments.
+   *
+   * This abstraction maintains a consistent API for environment-like variable storage
+   * while implementing it differently under the hood to work around runtime limitations.
+   */
 
-//  static public void setenv(String variable, String value) {
-//    inst.setenv(variable, value);
-//  }
-//
-//
-//  static public String getenv(String variable) {
-//    return inst.getenv(variable);
-//  }
-//
-//
-//  static public int unsetenv(String variable) {
-//    return inst.unsetenv(variable);
-//  }
+  static public void setenv(String variable, String value) {
+    Preferences.set(variable, value);
+  }
+
+  static public String getenv(String variable) {
+    return Preferences.get(variable);
+  }
+
+  static public int unsetenv(String variable) {
+    throw new RuntimeException("unsetenv() not yet implemented");
+  }
 }